The present invention relates to a synergistic herbicidal composition for weeds control in pre-emergence, early post emergence to late post emergence weed stage. More particularly, the present invention relates to a synergistic herbicidal composition comprising bioactive amounts of at least one phenoxyacetic herbicide or its agrochemically acceptable salts, at least one sulfonylurea herbicide or its agrochemically acceptable salts and at least one another triazine herbicide or its agrochemically acceptable salts, for control of broad-leaved weeds, sedges and grasses in various crops. The present invention also relates to process for preparing the said composition and its use as herbicide.
BACKGROUND OF THE INVENTION
Weeds are undesirable plants that can severely damage yield in crops. Farmers usually control these plants at the pre-plant stage as well as after sowing. The weeds can reduce field crop yields by competing for water, sunlight and nutrients. Profitable crop production depends on effective weed control. Herbicides are pesticides useful for killing or controlling unwanted plants/weeds. The agriculture industry uses a wide range of herbicides, primarily to control undesired growth of weeds which interfere with growth, development, yield and quality of agricultural crops. More so, they are used to provide an optimum environment for growth and propagation of plant varieties. Modern herbicides are used to either control or suppress these undesirable plants so as to allow sown crops a greater share of nutrient.
However, there still exists a scope for research and development of novel formulations for agriculture which are environmentally safe, cost-effective and which can be used for protection of crops during the critical periods of cultivation capable of acting both on the narrow-leaved and broad-leaved weeds, grasses and sedges. The control of undesired vegetation is extremely important in achieving high crop efficiency. Achievement of selective control of the growth of weeds especially in such useful crops as rice, soybean, Sugar beet, corn (maize), potato, wheat, barley, tomato and plantation crops such as sugarcane, among others, is very desirable. Unchecked weed growth in such useful crops can cause significant reduction in productivity and thereby result in increased costs to the consumer. The control of undesired vegetation in non-crop areas is also

important. Many products are commercially available for these purposes, but the need continues for new products that are more effective, less costly, less toxic, environmentally safer or have different modes of action.
More so, a wide range of herbicide compositions contain only a single active ingredient and cannot contain two or more active ingredients due to several reasons like adverse reactions, non-synergistic effects, non-compatibility of intermixed ingredients etc. However, the combinations currently known are not sufficient to control the resistant and persistent weeds. Growers, increasingly face complex weed situations that may not be controlled with just one herbicide.
Further, a majority of the commercially available chemical herbicides are selective in their action. A common problem with selective herbicides is its weed control spectrum, meaning the range of weed species effectively controlled by the herbicide, does not cover the full diversity of weeds affecting the crop and are not broad spectrum in nature. It is therefore, a practice to apply two or more herbicides simultaneously in order to achieve maximum spectrum of control. But it requires a lot of human ingenuity and rigorous efforts to identify compatibility between the active ingredients and the specific ratios in which these components must be mixed so as to obtain the maximum desired results.
Combinations of herbicides are used to control a broader range of weeds. However, the combination of herbicides may not always result in the desired effect. Combination of herbicides may lead to an additive effect or an antagonistic effect. It may also result in phytotoxicity to the crops making it an undesirable combination. Agronomists must therefore, carefully select the herbicides that can be combined to offer a synergistic effect that would control weeds while having no phytotoxic effect on the crop, and reduce the chances of development of herbicide resistant weeds. Thus, there still remains a need for improved herbicidal combinations that can effectively control weeds thereby improving yield and plant health, with reduced phytotoxicity.
Another common problem with many commercially available herbicides is the narrow window of application. Most of them provide either a pre-emergence or a post-emergence weed control. An effective weed control can be achieved by usage of herbicides appropriately, which can be applied as an early post emergence to late post emergence (3-12 leaf stage of weeds) as a one shot application. The activity of herbicides can be enhanced in various ways to achieve the maximum benefit. One of the ways is to use combinations. There is always a need in the art for improved herbicidal combinations with enhanced weed control efficacy, which are safe to crops and have no adverse effect on germination or growth of succeeding crops. Thus, there arises a need in the

art to combine herbicides with varied modes of action, which allows for broader spectrum of control, targeted effect with reduced or no phytotoxicity in one shot application and good resistance management apart from good residual effect on succeeding crops using lower application rates.
Therefore, to develop sound and practicable herbicidal recommendation, it is very important to study the residual effects of herbicides on succeeding crops in the rotation. However, identifying appropriate combinations, their agrochemical application rates and ratio of the combinations is essential to achieve efficacious control, which is not straight forward. The selection of a particular formulation type is more cumbersome for an agrochemical combination. However, there remains a great need for improved broadleaf, sedges and grassy weed control compositions and a method of controlling such noxious vegetation in pre and early post emergence to late post emergence (3-12 leaf stage of weeds.) without adversely affecting desirable plants and which reduces the amount of chemical herbicidal agent necessary to obtain the acceptable weed control. However, the activity and selectivity behaviour of a composition with multiple herbicides is difficult to predict since the behaviour of each single herbicide in such a composition is often affected by the presence of the other(s) and the activity of such a composition may also vary considerably depending on chemical character, plant species, growth stage, and environmental conditions, mostly this practice results in reduced activity of the herbicides in such type of compositions.
Further the environmental and economic requirements imposed on modern-day crop protection compositions are continually increasing, with regard, for example, to the spectrum of action, toxicity, selectivity, application rate, formation of residues, and favourable preparation ability, and since, furthermore, there may be problems, for example, with resistances, a constant task is to develop new compositions, in particular herbicidal agents, which in some areas at least help to fulfil the abovementioned requirements. Also, in particular, where different type of weeds such as grassy weeds, broad leaved weeds and sedges are required to be controlled together in a single application of herbicidal composition, which are dose friendly and efficacious and less phytotoxic to various crops & plants.

However, there still exists a scope for research and development of novel formulations for agriculture which are environmentally safe, cost-effective and which can be used for protection of crops during the critical periods of cultivation capable of acting both on the narrow-leaved and broad-leaved weeds, grasses and sedges.
Further, certain species of weeds are specifically resistant to specific herbicides and are therefore hard to kill. Such kind of weeds include various species of Cyperus genera weeds which affect useful crops like maize, Sorghum, potato and sugarcane. Thus, it is the need of the art to combine herbicides with varied modes of action, which effectively kill such weeds in a targeted manner in single shot application without causing phytotoxicity and using lower dose of application rate.
Certain applications disclose certain combinations of herbicides, but their compositions post a lot of issues.
For instance, Reference can be made to EP3664609A1 wherein, it discloses a herbicidal combination comprising at least two synthetic auxins, or at least two synthetic auxins with at least one ALS inhibitor, a composition comprising these combinations, a method of use of these combinations and a kit comprising the components of these combinations.
Reference can be made to IN201821025016 wherein, it discloses a synergistic herbicidal composition comprising A) Topramezone B) at least one herbicide selected from Atrazine and Metribuzin C) at least one more herbicide selected from Nicosulfuron, Rimsulfuron, Halosulfuron methyl, Mesotrione, Tembotrione, Sulcotrione, 2,4-D and salts thereof with one or more inactive excipients.
Reference can be made to US20020004457A1 wherein, it discloses a herbicidal synergistic composition for controlling broad-leaved weeds and grasses in crops of useful plants resistant to protoporphyrinogen oxidase inhibitors, comprising, in addition to customary inert formulation auxiliaries, as active compounds a) a herbicide which inhibits the action of protoporphyrinogen oxidases and b) at least one further pesticide selected from the group consisting of co-herbicides, fungicides and insecticides/acaricides.
Reference can be made to CN104186492 wherein, it discloses a weeding composition composed of one of 2, 4-D DIOA, 2,4-D isobutyl paraben or 2,4-D butyl ester and Ametryn. Compared with

a single dose, the weeding composite generates an obvious synergism; the dosage of effective components is reduced and the safety is strengthened.
Herbicidal activity is exhibited by the compounds of the synergistic composition when they are applied directly to the plant or to the locus of the plant at any stage of growth or before planting or emergence. The effect observed depends upon the plant species to be controlled, the stage of growth of the plant, the application parameters of dilution and spray drop size, the particle size of solid components, the environmental conditions at the time of use, the specific compound employed, the specific adjuvants and carriers employed, the soil type, and the like, as well as the amount of chemical applied.
Agriculturalist usually control or supress weed growth by using herbicides at either the pre-plant stages or after sowing or both depending on the weed type and the level of infestation. Combinations of herbicides are used to control a broader range of weeds. However, the combination of herbicides may not always result in the desired effect. Combination of herbicides may lead to an additive effect or an antagonistic effect. It may also result in phytotoxicity to the crops making it an undesirable combination. Agronomists must therefore, carefully select the herbicides that can be combined to offer a synergistic effect that would control weeds while having no phytotoxic effect on the crop, and reduce the chances of development of herbicide resistant weeds.
However, there remains a great need for improved broadleaf, sedges and grassy weed control compositions and a method of controlling such noxious vegetation in pre and early post emergence to late post emergence (3-12 leaf stage of weeds.) without adversely affecting desirable plants and which reduces the amount of chemical herbicidal agent necessary to obtain the acceptable weed control. However, the activity and selectivity behaviour of a composition with multiple herbicides is difficult to predict since the behaviour of each single herbicide in such a composition is often affected by the presence of the other(s) and the activity of such a composition may also vary considerably depending on chemical character, plant species, growth stage, and environmental conditions, mostly this practice results in reduced activity of the herbicides in such type of compositions.
Also, there still remains a need for improved herbicidal combinations that can effectively control weeds thereby improving yield and plant health, with reduced phytotoxicity and increased stability and shelf life.

Accordingly, it is desirable to develop compositions and processes comprising combinations of herbicides having different mode of action to give improved herbicidal bio-efficacy, broad-spectrum activity with better weed control, increased crop yield and reduced weed resistance and reduced or no phytotoxicity.
Phenoxyacetic herbicide such as 2,4-D, are reportedly very effective post emergence herbicide for controlling broadleaf weeds but have little effect on grasses such as Bermuda grass and sedges. Further, application of Phenoxyacetic herbicide such as 2,4-D and its agrochemically acceptable salts, esters have known to cause phytotoxicity on various crops and thus cause severe damage to susceptible crops such as cotton, grapes, tomatoes, oilseed crops and ornamentals Further, their efficacy have not been tested with selected sulfonylurea herbicide and triazine herbicide, for wide spectrum weed control in various crops.
However, still there is a need for a synergistic herbicidal composition which overcomes some of the existing problems mentioned above and can be prepared easily without much complex manufacturing process and exhibits synergism. Accordingly, it is desirable to develop compositions and processes comprising combination of herbicides having different mode of action to give improved herbicidal bio-efficacy, broad-spectrum activity with better weed control, increased crop yield and reduced weed resistance and better crop safety by having targeted action on weeds and minimum damage to succeeding crops.
Therefore, present invention aims to overcome the problems of the prior art and provide a synergistic herbicidal composition comprising bioactive amounts of at least one phenoxyacetic herbicide or its agrochemically acceptable salts, at least one sulfonylurea herbicide or its agrochemically acceptable salts and at least one another triazine herbicide or its agrochemically acceptable salts, which can demonstrate excellent synergistic and advantageous, unexpected effects against the undesired vegetation including weeds such as grassy weeds, broad leaved weeds and sedges.
This invention also provides a method of controlling undesired vegetation comprising applying to the locus of the undesired vegetation a herbicidally effective amount of the aforesaid synergistic herbicidal composition comprising bioactive amounts of at least one phenoxyacetic herbicide or its agrochemically acceptable salts, at least one sulfonylurea herbicide or its agrochemically acceptable salts and at least one another triazine herbicide or its agrochemically acceptable salts. This invention also relates to the aforesaid composition and method of controlling undesired

vegetation comprising applying to the locus of the undesired vegetation a herbicidally effective amount of said composition.
OBJECTS AND ADVANTAGES OF THE INVENTION:
It is an object of the present invention to provide a novel and effective synergistic herbicidal composition demonstrating high weed control efficacy.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition as one shot application for controlling harmful weeds in plants including grassy weeds, broad leaved weeds and sedges.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition which can be easily formulated.
It is another object of the present invention to provide a synergistic herbicidal composition which can be quickly absorbed by the treated leaves of the weeds.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition which is ideal for weed resistance management and provides enhanced weed control efficacy.
It is another object of the present invention to provide a novel and effective synergistic composition which provides a better control of weeds at lower use rates, and excellent residual control.
It is another object of the present invention to provide a novel and effective synergistic combination which provides broader and more complete spectrum of weed control.
Thus, an object of the present invention is to provide a novel and effective synergistic herbicidal composition and a method of controlling pre-emergence, early post emergence to late post emergence (3-12 leaf stage of weeds) weeds.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition having wide application window from early post-emergence to late post emergence (3-12 leaf stage of weeds) weeds.

It is another object of the present invention to provide a novel and effective synergistic herbicidal composition for improved broadleaf, sedges and grassy weed control without adversely affecting desirable plants.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition which reduces the amount of chemical herbicidal agent necessary to obtain the acceptable weed control.
It is another object of the present invention to provide a novel and effective synergistic composition showing improved resistance management as a result of broad spectrum activity of the combination of herbicides having different modes of action.
It is another object of the present invention to provide a novel and effective synergistic composition which provide excellent crop safety in terms of no phytotoxicity and no adverse effect on germination or growth of succeeding crops due to reduced amount of dosage.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition which is effective against hard to kill and resistant weeds including Cyperus genera weeds.
It is another object of the present invention to provide a novel and effective synergistic combination which has increased shelf life and stability.
It is another object of the present invention to provide a novel process for preparing a herbicidal composition comprising synergistic combination of herbicides, mentioned above.
It is another object of the present invention to provide a novel and effective herbicidal composition which is environmentally safe, possesses broad spectrum bio-efficacy and is less toxic in terms of phytotoxicity.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition which uses green surfactants including organo-silicone surfactants including silicone ethoxylated oils, bio-based efficacy enhancing agents including blend of polyterpene oils.
It is another object of the present invention to provide a novel and effective synergistic herbicidal composition which has enhanced efficacy and penetration capacity.

Yet another object of the present invention is to provide a method of improving plant health and increasing crop yield by using herbicidal composition comprising combination of herbicides selected from at least one of phenoxyacetic herbicide or its agrochemically acceptable salts, at least one sulfonylurea herbicide or its agrochemically acceptable salts and at least one another triazine herbicide or its agrochemically acceptable salts.
Some or all these and other objects of the invention can be achieved by way of the invention described hereinafter.
SUMMARY OF THE INVENTION
The present invention relates to a herbicidal composition comprising synergistic and bio-effective amount of a) at least one phenoxyacetic herbicides or its agrochemically acceptable salts b ) at least one sulfonylurea herbicide or its agrochemically acceptable salts and c) at least one another triazine herbicide or its agrochemically acceptable salts.
In one embodiment of the present invention, the herbicidal composition comprises:
a) at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts;
b) at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron, Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron, Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts; and
c) at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin, Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts; and
d) One or more of agrochemically acceptable excipients
In one embodiment of the present invention, the herbicidal composition comprises:
a) at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts;
b) at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron, Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron, Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts; and
c) at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin, Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts; and

d) organosilicone surfactants as spreading and sticking agents and bio based efficacy enhancing agents; and
e) One or more of agrochemically acceptable excipients
In one embodiment of the present invention, the herbicidal composition comprises:
a. at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D
ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts in the range of 5-
50% by weight of the formulation; and
b. at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron,
Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron,
Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts in the
range of 0.1-30% by weight of the formulation; and
c. at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin,
Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts in
the range of 5-75% by weight; and
d. One or more of agrochemically acceptable excipients
In another embodiment of the present invention, it is provided a process for preparation of the synergistic herbicidal composition comprising:
a) at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts;
b) at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron, Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron, Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts; and
c) at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin, Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts; and
d) One or more of agrochemically acceptable excipients
In one embodiment of the present invention, the present herbicidal composition controls various weeds in field crops, turf grass, horticulture & forestry, etc.
In one embodiment of the present invention, the present herbicidal composition is stable and has enhanced shelf life.

In one embodiment of the present invention, the present herbicidal composition has enhanced efficacy and penetration capacity.
In one aspect/ another embodiment of the present invention, the present herbicidal composition can be applied to a plant/crop by spraying, rubbing, atomizing, irrigating, evaporating, dusting, fogging, broadcasting, pouring, mist blowing, soil mixing, foaming, painting, spreading-on, drenching, dipping or drip irrigation, etc.
In another embodiment of the present invention, higher dosage of the composition of the present invention is applied to the soil for treatment of weeds in non-crop areas.
In yet another embodiment of the present invention, the present herbicidal composition can be applied as a foliar spray to cotton, wheat, soyabean, pulses and vegetables including but not limited to okra, tomato, sugar beet, egg-plants, lettuce, iceberg lettuce, pepper, cucumber, squash, melon, bean, dry-beans, peas, leek, garlic, onion, cabbage, carrot, tuber such as potato, sugar cane, tobacco, coffee, turf and forage, cruciferous, cucurbits, grapevines, pepper, fodder beet, oil seed rape, pansy, impatiens, petunia and geranium, etc.
In further embodiment of the present invention, herbicidal composition of the present invention further comprises agriculturally acceptable excipients selected from the group consisting of antifreeze, dispersing agents, wetting agents, antifoaming agents, biocides, thickeners, surfactants and solvents. Additional components may also be included, e.g., protective colloids, adhesives, thickeners, thixotropic agents, penetration agents, stabilisers, sequestering agents. More generally, the active materials can be combined with any solid or liquid additive, which complies with usual formulation techniques.
In yet another embodiment of the present invention, the composition can be formulated as one or more of Capsule suspension (CS), Dispersible concentrate (DC), Dustable powder (DP), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsifiable granule (EG), Emulsion water-in-oil (EO), Emulsifiable powder (EP), Emulsion for seed treatment (ES), Emulsion oil-in-water (EW), Flowable concentrate for seed treatment (FS), Granules (GR), Micro-emulsion (ME), Oil-dispersion (OD), Oil miscible flowable concentrate (OF), Oil miscible liquid (OL), Oil dispersible powder (OP), Suspension concentrate (SC), Suspension concentrate for direct application (SD), Suspo-emulsion (SE), Water soluble granule (SG), Soluble concentrate (SL), Spreading oil (SO), Water soluble powder (SP), Water soluble tablet (ST), Ultra-low volume

(ULV) suspension, Tablet (TB), Ultra-low volume (ULV) liquid, Water dispersible granules (WG), Wettable powder (WP), Water dispersible powder for slurry seed treatment (WS), Water dispersible tablet (WT), a mixed formulation of CS and SC (ZC) or A mixed formulation of CS and SE (ZE) and a mixed formulation of CS and EW (ZW).
DETAILED DESCRIPTION OF THE INVENTION
Discussed below are some representative embodiments of the present invention. The invention in its broader aspects is not limited to the specific details and representative methods. The illustrative examples are described in this section in connection with the embodiments and methods provided. The invention according to its various aspects is particularly pointed out and distinctly claimed in the appended claims read in view of this specification and appropriate equivalents.
All technical and scientific terms used herein have the same meanings as commonly understood by someone ordinarily skilled in the art to which the present subject matter belongs.
It is to be noted that, as used in the specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to a composition containing "a compound" includes a mixture of two or more compounds. It should also be noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
The expression of various quantities in terms of "% w/w" or "%" means the percentage by weight, relative to the weight of the total solution or composition unless otherwise specified.
The term "control" as used in the present disclosure and claims, means to prevent the appearance of undesired vegetation or to reduce its growth or vigor.
The term "active ingredient" (a.i.) or "active agent" used herein refers to that component of the composition responsible for control and killing of weeds.
The term "formulation" and "composition" as used herein conveys the same meaning and can be used interchangeably.
The terms "plants" and "vegetation" include, but are not limited to, germinant seeds, emerging seedlings, plants emerging from vegetative propagules, and established vegetation.

The term "locus" as used herein shall denote the vicinity of a desired crop in which weed control, typically selective weed control, of weeds is desired. The locus includes the vicinity of desired crop plants wherein the weed infestation has either emerged or is yet to emerge.
The term "crop" shall include a multitude of desired crop plants or an individual crop plant growing at a locus.
The term "non-crop" areas shall include airport, railway stations, metro areas, between trees, horticulture areas, industrial areas, etc
The term "synergistic", as used herein, refers to the combined action of two or more active agents blended together and administered conjointly that is greater than the sum of their individual effects.
"Bioactive amounts" as mentioned herein means that amount which, when applied for treatment of crops, is sufficient to give effect in such treatment.
The term "seed treatment" comprises all suitable seed treatment techniques known in the art, such as, but not limited to, seed dressing, seed coating, seed dusting, seed soaking, seed film coating, seed multilayer coating, seed encrusting, seed dripping, and seed pelleting.
The term "herbicide" is used herein to mean an active ingredient that kills, controls or otherwise adversely modifies the growth of plants. An herbicidally effective or vegetation controlling amount is an amount of active ingredient which causes a "herbicidal effect," i.e., an adversely modifying effect and includes deviations from natural development, killing, regulation, desiccation, retardation, and the like.
The term "health of a plant" or "plant health" is defined as a condition of the plant and/or its products. As a result of the improved health; yield, plant vigour, quality and tolerance to abiotic or biotic stress is increased. It is noteworthy that the health of a plant when applying the composition according to the present invention, is increased independently of the pesticidal properties of the active ingredients used; because the increase in health is not based upon the reduced pest pressure but instead on complex physiological and metabolic reactions which result for example in an activation of the plant's own natural defence system. As a result, the health of a plant is increased even in the absence of pest pressure.
According to the present invention, "increased yield" of a plant, in particular of an agricultural, silvicultural and/or horticultural plant means that the yield of a product of the respective plant is

increased by a measurable amount over the yield of the same product of the plant produced under the same conditions, but without the application of the mixture according to the invention.
Increased yield can be characterized, among others, by the following improved properties of the plant: increased plant weight, increased plant height, increased biomass such as higher overall fresh weight (FW), increased number of flowers per plant, higher grain yield, more tillers or side shoots (branches), larger leaves, increased shoot growth, increased protein content, increased oil content, increased starch content, increased pigment content, increased leaf are index.
Phenoxy herbicides have been commercially available for over 60 years and are the most widely used family of herbicides worldwide. 2,4-Dichlorophenoxyacetic acid (2,4-D), the most common of the phenoxy herbicides, is one of the best-studied agricultural chemicals. Phenoxyacetic herbicides are synthetic auxins widely used in agriculture. They control broadleaf weeds by affecting growth of the plant's vascular tissue and are being often applied to protect grass and grain crops. The most common representatives are 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxyacetic acid (MCPA). For agricultural application, phenoxy herbicides are usually used as quaternary ammonium salts or esters, which can be more readily taken up by plants. Salts, long chain, or other low volatile esters of 2,4-D, such as the butoxyethyl ester, must be used because some lower molecular weight esters may have sufficiently high vapor pressures to volatilize and cause damage to adjacent crops. (2,4-DB) is more selective than 2,4-D because it must be activated by oxidation to 2,4-D in susceptible plants. The difference among various species in their ability to oxidize 2,4-DB to 2,4-D forms a basis for selectivity in its application. Various phenoxyacetic herbicdes are known in the art. Chemical structure of some of such herbicides are provided below:


CH3
/ V.. CI—(\ ,)—O OH HN
^ //
n /W 0H "^ / vCHj
Sulfonylurea herbicides inhibit the action of the enzyme acetolactate synthase (ALS), which is essential in the biosynthesis of three branched-chain amino acids—isoleucine, leucine, and valine. ALSase is key enzyme in branched amino acid (i.e. valine, leucine, isoleucine) biosynthesis pathway. Plants die due to starvation for needed proteins in new growth because they cannot form these needed proteins without the amino acids valine, leucine, isoleucine. This inhibition leads to the rapid cessation of plant cell division and growth. Crop-selective sulfonylurea herbicides have been commercialized for use in wheat, barley, rice, corn, soybeans and oilseed rape, with additional crop-selective compounds in cotton, potatoes, and sugarbeet having been noted. There exists some limitation as regards usage and application of Sulfonylurea herbicides, which includes plant injury such as chlorosis, necrosis, terminal bud and meristem death (below), stunting, vein discoloration. Various sulfonylurea herbicides are known in the art. Chemical structure of some of such herbicides are provided below:


Triazine herbicide is a kind of broad-spectrum herbicide with the basic chemical structure of triazine. The major mechanism is to inhibit the photosynthesis, affecting the synthesis of the assimilation product. For example, the order of the several inhibitory effects of propazine, prometon, and prometryn on the metabolic processes of bean is photosynthesis, lipid synthesis, RNA synthesis and protein synthesis. Chlorophyll may be the major pigment on which triazine herbicides exert its toxic effect. The degree of toxicity is directly proportional to the light intensity and the herbicide doesn't work in the dark. Even triazine herbicide blocks the stream of electrons from water from to the chlorophyll, causing oxidation of chlorophyll, leading to the gradually destruction of the layered structure of chloroplasts. In addition, the herbicide can inhibit the electron transport system during photosynthesis, causing the accumulation of nitrate inside the blade, strengthening the damage to the sensitive plant. Chlorosis is the main symptom of this class of herbicides, first the blade tip will get chlorosis and withered, the leaf edge will then turn yellow, and finally the whole plant dead. The most prominent example is the benzoxazinone existing inside the corn body is able to cause the hydroxylation and inactivation of atrazine; triazine

herbicide can also from conjugate with the glutathione inside the resistant crops so that the crops get detoxification. Triazine herbicide can also undergo photolysis. In the soil, it can also get dehalogenation, N- dealkylation, deamination and ester hydrolysis, pyrolysis and other reactions to be degraded. Various triazine herbicides are known in the art. Chemical structure of some of such herbicides are provided below:

Since the 1960s, three triazine compounds have been particularly important in the sugarcane industry. These include simazine, atrazine, and Ametryn. Ametryn was introduced in 1962 and is still an established pre-emergence and early post-emergence herbicide. Ametryn is effective against annual broadleaf weeds and grasses and is often used in tank mixes and in prepacks with other products. Ametryn is a thiotriazine selective systematic herbicide absorbed principally through the roots, but also through the foliage, translocated acropetally in the xylem and accumulated in the apical meristems and leaves. Ametryn binds to the plastoquinone-binding protein in photosystem II, inhibiting electron transport. It also is used in banana, citrus, palm, and coffee and has had limited use as a post directed spray on corn. Ametryn is used for pre-emergence and post-emergence control of both monocotyledonous and dicotyledonous weeds in corn, sugarcane, banana, pineapple, and non-crop areas.

In one embodiment of the present invention, the at least one phenoxyacetic herbicide is selected from 2,4-D dimethyl amine salt, 2.4-D ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts.
In another embodiment of the present invention, the at least one phenoxyacetic acid herbicide is present in an amount of about 5-50% weight of the total composition.
In one embodiment of the present invention, the at least on sulfonylurea herbicide is selected from Chlorimuron-ethyl, Cyclosulfuron, Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron, Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts.
In another embodiment of the present invention, the at least on sulfonylurea herbicide is present in an amount of about 0.1-30% weight of the total composition.
In one embodiment of the present invention, the at least one another triazine herbicide is selected from Ametryn, Atrazine, Metribuzin, Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts.
In another embodiment of the present invention, the at least one another triazine herbicide is present in an amount of about 5-75% weight of the total composition.
In another embodiment of the present invention, the herbicidal composition of the present invention further comprises trisiloxane ethoxylate as organosilicone surfactant/adjuvant.
In another embodiment of the present invention, the herbicidal composition of the present invention further comprises blend of polyterpene resin (natural oils) as bio-based efficacy enhancing agents.
In accordance with an embodiment of the invention, there is provided a synergistic herbicidal composition comprising active ingredients present in the weight ratios as given below; and one or more customary formulation adjuvants.

Phenoxyacetic Sulfonylurea Triazine herbicide
herbicide herbicide
2,4-D Dimethyl Halosulfuron Methyl Ametryn
amine salt Metsulfuron Atrazine
2,4-D Ethyl Ester Chlorimuron-ethyl Metribuzin

2,4-D Sodium Salt Prosulfuron Cyanazine
Thifensulfuron- Prometon
methyl Hexazinone
Cyclosulfuron Sulfometuron Primisulfuron Simazine
5% to 50% 0.1% to 30% 5% to75%
Surprisingly it has been found that by combining the herbicides of the present synergistic composition, the pesticide residue in soil and pesticide drift are reduced, the environmental sustainability is facilitated; moreover, the weeding composition provided by the invention has dual functions of foliage treatment and soil closing, thereby being capable of extensive application in agricultural field.
Further, the present synergistic herbicidal composition also exhibits pre and post-emergence/ selective, non-selective use, reduction in spray drift.
In preferred embodiment of the present invention, at least one phenoxyacetic herbicide is 2,4-D or its agrochemically acceptable salts.
In still another preferred embodiment of the present invention, 2,4-D or its agrochemically acceptable salts is 2, 4-D dimethyl amine.
In yet another preferred embodiment, 2-4-D is present in an amount of 36.6% weight of the total composition
In preferred embodiment of the present invention, the at least one sulfonylurea herbicide is Halosulfuron-methyl.
In another preferred embodiment, Halosulfuron-methyl is present in an amount of 1.3% weight of the total composition
In preferred embodiment of the present invention, the at least one another triazine herbicide is Ametryn.
In another preferred embodiment, Ametryn is present in an amount of 40% weight of the total composition.

In another preferred embodiment, the composition of the present invention is effective against highly resistant and hard to kill weeds including Cyperus genera weeds.
In another preferred embodiment, the composition of the present invention is applied in one shot application for killing/ controlling highly resistant broad leaved weeds, grasses and sedges at lower application rates.
In yet another embodiment of the present invention, the present herbicidal composition can be formulated as one or more of Capsule suspension (CS), Dispersible concentrate (DC), Dustable powder (DP), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsifiable granule (EG), Emulsion water-in-oil (EO), Emulsifiable powder (EP), Emulsion for seed treatment (ES), Emulsion oil-in-water (EW), Flowable concentrate for seed treatment (FS), Granules (GR), Micro-emulsion (ME), Oil-dispersion (OD), Oil miscible flowable concentrate (OF), Oil miscible liquid (OL), Oil dispersible powder (OP), Suspension concentrate (SC), Suspension concentrate for direct application (SD), Suspo-emulsion (SE), Water soluble granule (SG), Soluble concentrate (SL), Spreading oil (SO), Water soluble powder (SP), Water soluble tablet (ST), Ultra-low volume (ULV) suspension, Tablet (TB), Ultra-low volume (ULV) liquid, Water dispersible granules (WG), Wettable powder (WP), Water dispersible powder for slurry seed treatment (WS), Water dispersible tablet (WT), a mixed formulation of CS and SC (ZC) or A mixed formulation of CS and SE (ZE) and a mixed formulation of CS and EW (ZW).In an especially preferred embodiment of the invention, the yield of the treated plant is increased.
The herbicidal synergistic composition of present invention controls all kind of monocots, dicots and sedges weeds. The most common weeds controlled are selected from Abutilon indicum, Acalypha indica, Acanthospermum hispidum, Achyranthes aspera, Aerva tomentosa, Ageratum conyzoides, Alhagi camelorum, Amaranthus hybridus, Amaranthus spinosus, Amaranthus viridis, Ammannia baccifera, Anagallis arvensis, Argemone mexicana, Artemisia nilagiricia, Asphodelus tenuifolius, Avena fatua, Avena ludoviciana, Bidens pilosa, Boerhaavia diffusa, Boerhavia repanda, Brachiaria mutica, Brassica kaber, Bromus tectorum, Calotropis gigantea, Cannabis sativa, Carthamus axyacantha, Cassia tora, Celosia argentea, Centella asiatica, Chenopodium album, Chenopodium murale, Chloris barbata, Chrozophora rottlerii, Cichorium intybus, Cirsium arvense, Clitoria ternatea, Cnicus arvensis, Commelina benghalensis, Commelina communis, Convolvulus arvensis, Conyza canadensis, Corchorus acutangulus, Coronopus didymus, Crotalaria serice, Cucumis callosus, Cuscuta campestris, Cuscuta chinensis, Cynodon dactylon, Cyanotis axillaris, Cyperus esculenthus, Cyperus iria, Cyperus rotundus, Dactyloctenium

aegyptium, Datura stramonium, Daucus carota, Digera arvensis, Digitaria sanguinalis, Dinebra retroflexa, Echinochola colonum, Echinochola crusgalli, Eclipta alba, Eichhornia crassipes, Elephantopus scaber, Eleusine indica, Eragrostis major, Euphorbia geniculata, Euphorbia hirta, Fimbristylis miliacea, Fumaria indica, Gynandropsis gynandra, Heliotropium indicum, Indigofera glandulosa, Ipomea aquatica, Lantana camara, Lathyrus aphaca, Launaea asplenifolia, Launaea nudicaulis, Leucas aspera, Marsilea quadrifoliata, Medicago denticulate, Mimosa pudica, Melilotus alba, Melilotus indica, Ocimum canum, Oenothera biennis, Opuntia dillenil, Orobanche ramosa, Oryza longistaminata, Oryza sativa, Oxalis corniculata, Oxalis latifolia, Parthenium hysterophorus, Paspalum sanguinale, Phalaris minor, Phyllanthus niruri, Physalis minima, Polypogon monspeliensis, Portulaca oleracea, Prosopis juliflora, Rumex dentatus, Saccharum spontaneum, Stearia glauca, Seteria viridis, Sida spinosa, Silene antirrhina, Sisymbrium irio, Solanum nigrum, Solanum surattense, Sonchus oleraceous, Sorghum halepense, Spergula arvensis, Sphenocleazeylanica Gaertn, Striga asiatica, Tagetes minuta, Trianthema monogyna, Trianthema portulacastrum, Tribulus terrestris, Trigonelia polycerata, Vernonia cinerea, Vicia sativa and Xanthium strumarium.
In one embodiment of the present invention, the synergistic herbicidal composition of present invention is effective in controlling the growth of undesirable vegetation, e.g., in monocot and dicot crops including genetically modified and conventional or non-genetically modified varieties of sugarcane (Saccharum officinarum), corn/maize (Zea mays), Sorghum (Sorghum bicolor), Pearl millet (Pennisetum glaucum), Soybean (Glycin max), Peanut (Arachis hypogaea), Sunflower (Helianthus annuus), Green gram (Vigna radiata), Black gram (Vigna mungo), Chickpea (Cicer aritinum), Cowpea (Vigna unguiculata), Redgram (Cajanus cajan), Frenchbean (Phaseolus vulgaris), Indian bean (Lablab purpureus), Horse gram (Macrotyloma uniflorum), Field pea (Pisum sativum), Cluster bean (Cyamopsis tetragonoloba), Lentils (Lens culinaris), Apple (Melus domestica), Banana (Musa spp.), Citrus groups (Citrus spp.), Grape (Vitis vinifera), Guava (Psidium guajava), Litchi (Litchi chinensis), Mango (Mangifera indica), Papaya (Carica papaya), Pineapple (Ananas comosus), Pomegranate (Punica granatum), Sapota (Manilkara zapota), Tea (Camellia sinensis), Coffea (Coffea Arabica), Coconut (Coco nucifera).
The synergistic herbicidal compositions can be also employed to promote non-selection and selective herbicidal action in fallow land, non-cropped industrial land, road and highway sides.

In one embodiment of the present invention, the synergistic herbicidal composition of present invention is effective against monocots, dicots and sedges weeds and are selected from Abutilon indicum, Acalypha indica, Acanthospermum hispidum, Achyranthes aspera, Aerva tomentosa, Ageratum conyzoides, Alhagi camelorum, Amaranthus hybridus, Amaranthus spinosus, Amaranthus viridis, Ammannia baccifera, Anagallis arvensis, Argemone mexicana, Artemisia nilagiricia, Asphodelus tenuifolius, Avena fatua, Avena ludoviciana, Bidens pilosa, Boerhaavia diffusa, Boerhavia repanda, Brachiaria mutica, Brassica kaber, Bromus tectorum, Calotropis gigantea, Cannabis sativa, Carthamus axyacantha, Cassia tora, Celosia argentea, Centella asiatica, Chenopodium album, Chenopodium murale, Chloris barbata, Chrozophora rottlerii, Cichorium intybus, Cirsium arvense, Clitoria ternatea, Cnicus arvensis, Commelina benghalensis, Commelina communis, Convolvulus arvensis, Conyza canadensis, Corchorus acutangulus, Coronopus didymus, Crotalaria serice, Cucumis callosus, Cuscuta campestris, Cuscuta chinensis, Cynodon dactylon, Cyanotis axillaris, Cyperus esculenthus, Cyperus iria, Cyperus rotundus, Dactyloctenium aegyptium, Datura stramonium, Daucus carota, Digera arvensis, Digitaria sanguinalis, Dinebra retroflexa, Echinochola colonum, Echinochola crusgalli, Eclipta alba, Eichhornia crassipes, Elephantopus scaber, Eleusine indica, Eragrostis major, Euphorbia geniculata, Euphorbia hirta, Fimbristylis miliacea, Fumaria indica, Gynandropsis gynandra, Heliotropium indicum, Indigofera glandulosa, Ipomea aquatica, Lantana camara, Lathyrus aphaca, Launaea asplenifolia, Launaea nudicaulis, Leucas aspera, Marsilea quadrifoliata, Medicago denticulate, Mimosa pudica, Melilotus alba, Melilotus indica, Ocimum canum, Oenothera biennis, Opuntia dillenil, Orobanche ramosa, Oryza longistaminata, Oryza sativa, Oxalis corniculata, Oxalis latifolia, Parthenium hysterophorus, Paspalum sanguinale, Phalaris minor, Phyllanthus niruri, Physalis minima, Polypogon monspeliensis, Portulaca oleracea, Prosopis juliflora, Rumex dentatus, Saccharum spontaneum, Stearia glauca, Seteria viridis, Sida spinosa, Silene antirrhina, Sisymbrium irio, Solanum nigrum, Solanum surattense, Sonchus oleraceous, Sorghum halepense, Spergula arvensis, Sphenocleazeylanica Gaertn, Striga asiatica, Tagetes minuta, Trianthema monogyna, Trianthema portulacastrum, Tribulus terrestris, Trigonelia polycerata, Vernonia cinerea, Vicia sativa and Xanthium strumarium.
In another embodiment of the present invention, the invention further provides the process for preparation of the said formulation, wherein, the formulation can be one or more of Capsule suspension (CS), Dispersible concentrate (DC), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsion, water in oil (EO), Emulsion for foliar spray (ES), Emulsion, oil in water (EW), Flowable suspension/concentrate for foliar spray (FS), Granule/ soil applied (GR),

Controlled (Slow or Fast) release granules (CR), Jambo balls or bags (bags in water soluble pouch), Solution for foliar spray (LS), Micro-emulsion (ME), Oil dispersion (OD), Oil miscible flowable concentrate (oil miscible suspension (OF), Oil miscible liquid (OL), Suspension concentrate (flowable concentrate) (SC), Suspo-emulsion (SE), Water soluble granule (SG), Soluble concentrate (SL), Water soluble powder (SP), Water dispersible granule (WG or WDG), Wettable powder (WP), Water dispersible powder for slurry treatment (WS), A mixed formulation of CS and SC (ZC), A mixed formulation of CS and SE (ZE), A mixed formulation of CS and EW (ZW).
The present inventors believe that the combination of the present invention surprisingly results in a synergistic action. The combination of the present invention allows for a broad spectrum of pre-emergence, early post emergence or late post emergence. It can be also applied as blanket spray over the crop and weed or in between the rows as directed application. The present compositions can be applied to weeds or their locus by the use of conventional ground or aerial duster, sprayers, and granules applicators by addition to irrigation and by other conventional means known to those skilled in art.
The present inventors believe that the composition of the present invention surprisingly results in a synergistic action. The composition of the present invention allows for a broad spectrum of weed control and has surprisingly improved plant yield.
The composition of the present invention in addition to bioactive amounts of active ingredients, further comprises inactive excipients including but not limited to surfactant/dispersing agent, anti-freezing agent, anti-foaming agent, wetting agent, suspension aid, antimicrobial/anti-bacterial agent, thickener, quick coating agent or sticking agents/sticker, spreader, binders, adjuvants, fillers, emulsifiers, coloring pigments, dyes, preservatives, buffering agent and mixtures thereof.
Suitable liquid carriers that may be employed in a composition of the present invention may include water or organic solvents. The organic solvents include, but are not limited to, petroleum fractions or hydrocarbons such as mineral oil, aromatic solvents, paraffinic oils, and the like; vegetable oils such as soybean oil, rapeseed oil, olive oil, castor oil, sunflower seed oil, coconut oil, corn oil, cottonseed oil, linseed oil, palm oil, peanut oil, safflower oil, sesame oil, tung oil and the like; esters of the above vegetable oils; esters of monoalcohols or dihydric, trihydric, or other lower polyalcohols (4-6 hydroxy containing), such as 2-ethyl hexyl stearate, n-butyl oleate, isopropyl myristate, propylene glycol dioleate, di-octyl succinate, di-butyl adipate, di-octyl phthalate and the like; esters of mono, di and polycarboxylic acids and the like. Organic solvents

include, but are not limited to toluene, xylene, petroleum naphtha, crop oil, acetone, methyl ethyl ketone, cyclohexanone, trichloroethylene, perchloroethylene, ethyl acetate, amyl acetate, butyl acetate, propylene glycol monomethyl ether and diethylene glycol monomethyl ether, methyl alcohol, ethylalcohol, isopropyl alcohol, amyl alcohol, ethylene glycol, propylene glycol, glycerine, N-methyl-2-pyrrolidinone, N,N-dimethyl alkylamides, dimethyl sulfoxide.
Solid carriers that may be employed in the compositions of the present invention may include but are not limited to attapulgite, pyrophyllite clay, silica, kaolin clay, kieselguhr, chalk, diatomaceous earth, lime, calcium carbonate, bentonite clay, Fuller's earth, talc, cottonseed hulls, wheat flour, soybean flour, pumice, wood flour, walnut shell flour, lignin, cellulose etc.
Surfactants that are used as dispersants have the ability to adsorb strongly onto a particle surface and provide a charged or stearic barrier to re-aggregation of particles. The most commonly used surfactants are anionic, non-ionic, or mixtures of the two types. For wettable powder formulations, the most common dispersants are sodium lignosulphonates. For suspension concentrates, very good adsorption and stabilization are obtained using polyelectrolytes, such as sodium naphthalene sulphonate formaldehyde condensates. Tristyrylphenolethoxylate phosphate esters are also used. Nonionics such as alkylaryl ethylene oxide condensates and EO-PO 10 block copolymers are sometimes combined with anionics as dispersants for suspension concentrates. In recent years, new types of very high molecular weight polymeric surfactants have been developed as dispersants. These have very long hydrophobic 'backbones' and a large number of ethylene oxide chains forming the 'teeth' of a 'comb' surfactant. These high molecular weight polymers can give very good long-term stability to suspension concentrates because the hydrophobic backbones have many anchoring points onto the particle surfaces. Examples of dispersants used herein include but not limited to sodium lignosulphonates; Tristyrylphenol Ethoxylate Amine salt of phosphate tristyryl phenol ethylated /Acrylic Copolymer/ Ethoxylated Tristryl phenol Sulphate,Naphthalene sulfonic acid,sodium salt condensate with formaldehyde,Ethoxylated oleyl cetyl alcohol, Polyalkelene glycol ethersodium naphthalene sulphonate formaldehyde condensates; tristyrylphenolethoxylate phosphate esters; aliphatic alcohol ethoxylates; alky ethoxylates; EO-PO block copolymers; and graft copolymers or mixtures thereof.
In one embodiment of the present invention, surfactants/dispersing agents are present in the range of 0.5-10% of the total composition.
Emulsifiers are added to buffering agent as used herein is selected from group consisting of calcium hydroxyapatite, Potassium Dihydrogen Phosphate, Sodium Hydroxide, carbonated

apatite, calcium carbonate, sodium bicarbonate, tricalcium phosphate, calcium phosphates, carbonated calcium phosphates, amine monomers, lactate dehydrogenase and magnesium hydroxide.
Emulsifier are further added to Oil Dispersion formulations for uniform emulsions and are selected from Castor oil ethoxylates, Calcium alkyl benzene sulfonate or mixtures thereof, in the range from 0.1-10% of the total composition.
Anti-freezing agent as used herein can be selected from the group consisting of polyethylene glycols, methoxypolyethylene glycols, propylene glycol, polypropylene glycols, polybutylene glycols, glycerine, ethylene glycol and mixtures thereof.
In one embodiment of the present invention, Anti-freezing agents are present in the range of 0.1-20% of the total composition.
Water-based formulations often cause foam during mixing operations in production. In order to reduce the tendency to foam, anti-foam agents are often added either during the production stage or before filling into bottles. Generally, there are two types of anti-foam agents, namely silicones and non-silicones. Silicones are usually aqueous emulsions of dimethyl polysiloxane while the nonsilicone anti-foam agents are water-insoluble oils, such as octanol and nonanol, or silica. In both cases, the function of the anti-foam agent is to displace the surfactant from the air-water interface.
A wetting agent is a substance that when added to a liquid increases the spreading or penetration power of the liquid by reducing the interfacial tension between the liquid and the surface on which it is spreading. Wetting agents are used for two main functions in agrochemical formulations: during processing and manufacture to increase the rate of wetting of powders in water to make concentrates for soluble liquids or suspension concentrates; and during mixing of a product with water in a spray tank or other vessel to reduce the wetting time of wettable powders and to improve the penetration of water into water-dispersible granules. Examples of wetting agents used in wettable powder, suspension concentrate, and water-dispersible granule formulations include but not limited to sodium lauryl sulphate; sodium dioctylsulphosuccinate; Tristyrylphenol ethoxylate non-ionic emulsifier/ mixture of non-ionic surfactants & alkoxylated Alcohol/Block copolymer, alkyl phenol ethoxylates; and aliphatic alcohol ethoxylates and the salts thereof and mixtures thereof, which are standard in agriculture or mixtures thereof.

In one embodiment of the present invention, wetting agents are present in the range of 0.5-10% of the total composition.
Suspension aid in the present description denotes a natural or synthetic, organic or inorganic material with which the active substance is combined in order to facilitate its application to the plant, to the seeds or to the soil. This carrier is hence generally inert, and it must be agriculturally acceptable, in particular to the plant being treated. The carrier may be solid (clays, natural or synthetic silicates, silica, resins, waxes, solid fertilizers, and the like or mixtures thereof) or liquid (water, alcohols, ketones, petroleum fractions, aromatic or paraffinic hydrocarbons, chlorinated hydrocarbons, liquefied gases, and the like or mixtures thereof).
Biocides / Microorganisms cause spoilage of formulated products. Therefore, antimicrobial/anti-bacterial agents are used to eliminate or reduce their effect. Examples of such agents include, but are not limited to: propionic acid and its sodium salt; sorbic acid and its sodium or potassium salts; benzoic acid and its sodium salt; p-hydroxy benzoic acid sodium salt; methyl p-hydroxy benzoate; and biocide such as sodium benzoate, l,2-benzisothiazoline-3-one, 2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, potassium sorbate, parahydroxy benzoates, Benzisothiazolin-3-one / Formaldehyde or mixtures thereof.
In one embodiment of the present invention, antimicrobial/anti-bacterial agents are present in the range of 0.01-1% of the total composition.
Thickeners or gelling agents are used mainly in the formulation of suspension concentrates, emulsions and suspo-emulsions to modify the rheology or flow properties of the liquid and to prevent separation and settling of the dispersed particles or droplets. Thickening, gelling, and anti-settling agents generally fall into two categories, namely water-insoluble particulates and water-soluble polymers. It is possible to produce suspension concentrate formulations using clays and silicas. Examples of these types of materials, include, but are limited to, montmorillonite, bentonite clay; magnesium aluminum silicate; and attapulgite. Water soluble polysaccharides have been used as thickening-gelling agents for many years. The types of polysaccharides most commonly used are natural extracts of seeds and seaweeds are synthetic derivatives of cellulose or mixtures thereof. Examples of these types of materials include, but are not limited to, guar gum; locust bean gum; carrageenam; xanthan gum; alginates; polysaccharides, methyl cellulose; sodium carboxymethyl cellulose (SCMC); hydroxyethyl cellulose (HEC), bentonite clay or mixtures thereof. Other types of anti-settling agents are based on modified starches, polyacrylates, polyvinyl alcohol and polyethylene oxide or mixtures.

In one embodiment of the present invention, thickeners or gelling agents are present in the range of 0.01-3% of the total composition.
Defoamer/Antifoaming agent are used in agro-chemical formulations to prevent foaming during mixing and spraying stage and generally added to the composition as foam formation prevents the efficient filling of a container. Antifoaming agent are selected form the group consisting of silicon emulsion based anti-foam agents, Siloxane polyalkyleneoxide, trisiloxane ethoxylates and mixtures thereof
In one embodiment of the present invention, antifoaming agents are present in the range of 0.01-1% of the total composition.
Filler is added to the composition to improve the handling and storage characteristics of the composition. Fillers also add mass and/or volume to the active ingredient in order to facilitate precise measurement of the doses. Suitable fillers that may be used in the composition of the present invention include, but not limited to, Silicon Dioxide, bentonite clay, china clay, silica, kaolin, talc, starch, diatomaceous earth and mixtures thereof.
In one embodiment of the present invention, fillers are present in the range of 0.1-5% of the total composition.
An adjuvant used in the present invention is any material that is added to an agrochemical formulation to enhance or modify the performance of the formulation. An adjuvant used in the present invention to make it a safer to ecological environmental, having low toxicity and having no phytotoxicity effects on any part of the plant.
Extender or sticker/sticking agent keeps herbicide active on a target for an extended period or on waxy foliage. Sticker allows pesticides to stay on a treated surface longer. Some stickers help to hold solid particles to a treated surfaces. This reduces the amount that washes off due to rain or irrigation. Others reduce evaporation and/or slow breakdown by sunlight.
Spreader allows a pesticide to form a uniform layer over a treated surface. Spreaders such as Silicone Ethoxylated Oil lowers the surface tension of spray solutions beyond that which is achievable with conventional non-ionic surfactants. In fact, it has the potential to provide adequate coverage in many low volume spray applications at rates between 0.025% and 0.1% . It decreases the surface tension of spray solutions to much lower values, in comparison to conventional adjuvants. This results in significantly enhanced spreading of spray solutions over the treated plant

surfaces which carries tank mix products to morphologically complex and thus difficult-to-reach parts of the plant.
Advantages of organosilicone adjuvants (OSSA):
Quick spreading and wetting
Uniform droplet distribution
Absorption on leaf and stem surfaces
Known benefits: Increases pesticide efficacy
In yet another embodiment of the present invention, the agrochemically acceptable adjuvants-Silicone Ethoxylated Oil, Polyvinyl Pyrrolidon, Polyvinyl Alcohol, Blend of poly terpene resin or mixtures thereof, are present in the range of 0.1-10%
In another embodiment of the present invention, the herbicidal composition of the present invention further comprises organosilicone surfactants/adjuvant as spreading and sticking agents and bio based efficacy enhancing agents.
In another embodiment of the present invention, the herbicidal composition of the present invention further comprises trisiloxane ethoxylate as organosilicone surfactant/adjuvant.
In another embodiment of the present invention, the herbicidal composition of the present invention further comprises blend of polyterpene resin (natural oils) as bio based efficacy enhancing agents.
The quick coating agent can be a conventionally available sticker, for example polyesters, polyamides, poly- carbonates, polyurea and polyurethanes, acrylate polymers and copolymers, styrene copolymers, butadiene copolymers, polysaccharides such as starch and cellulose derivatives, vinylalcohol, vinylacetate and vinylpyrrolidone polymers and copolymers, polyethers, epoxy, phenolic and melamine resins, polyolefins and define copolymersand mixtures thereof. Examples of preferred polymers are acrylate polymers such as poly(methacrylate), poly(ethyl methacrylate), poly(methylmethacrylate), acrylate copoylmers and styrene-acrylic copolymers as defined herein below, poly(styrenecomaleic anhydride), cellulosic polymers such as ethyl cellulose, cellulose acetate, cellulose acetatebutyrate, acetylated mono, di, and triglycerides, polyvinylpyrrolidone), vinyl acetate polymers and copolymers, poly(alkylene glycol), styrene butadiene copolymers, poly(orthoesters), alkyd resins, and mixtures of two or more of these.

Polymers that are biodegradable are also useful in the present invention. As used herein, a polymer is biodegradable if is not water soluble, but is degraded over a period of several weeks when placed in an application environment. Examples of biodegradable polymers that are useful in the present invention include biodegradable polyesters, starch, polylactic acid starch blends, polylactic acid, poly(lactic acid-glycolic acid) copolymers, polydioxanone, cellulose esters, ethyl cellulose, cellulose acetate butyrate, starch esters, starch esteraliphatic polyester blends, modified corn starch, polycaprolactone, poly(namylmethacrylate), wood rosin, polyanhydrides, polyvinylalcohol, polyhydroxybutyratevalerate, biodegradable aliphatic polyesters, and polyhydroxybutyrate or mixtures thereof.
The solvent for the formulation of the present invention may include water, water soluble alcohols and dihydroxy alcohol ethers. The water-soluble alcohol which can be used in the present invention may be lower alcohols or water-soluble macromolecular alcohols. The term "lower alcohol", as used herein, represents an alcohol having 1-4 carbon atoms, such as methanol, ethanol, n-propanol, isopropanol, n-butanol, tert-butanol, etc. Macromolecular alcohol is not limited, as long as it may be dissolved in water in a suitable amount range, polyethylene glycol, sorbitol, glucitol, etc. The examples of suitable dihydroxy alcohol ethers used in the present invention may be dihydroxy alcohol alkyl ethers or dihydroxy alcohol aryl ethers. The examples of dihydroxy alcohol alkyl ether include ethylene glycol methyl ether, diethylene glycol methyl ether, propylene glycol methyl ether, dipropylene glycol methyl ether, ethylene glycol ethyl ether, diethylene glycol ethyl ether, propylene glycol ethyl ether, dipropylene glycol ethyl ether, etc. The examples of dihydroxy alcohol aryl ethers include ethylene glycol phenyl ether, diethylene glycol phenyl ether, propylene glycol phenyl ether, dipropylene glycol phenyl ether, and the like. Any of the above mentioned solvent can be used either alone or in combination thereof.
In an embodiment, the combination of the present invention may be combined with at least another active ingredient such as those selected from but not limited to herbicide, insecticide, fungicide, biological agent, plant growth activator, fertilizers or combinations thereof.
The method of control of the present invention may be carried out by spraying the suggested tank mixes, or the individual herbicides may be formulated as a kit-of-parts containing various components that may be mixed as instructed prior to spraying.
In a specific embodiment, the herbicidal composition of the present invention may be applied in an amount of about 3750 g/ha.

The described compositions may be made at the time of use, or diluted, or else they can be concentrated compositions, or so-called "ready-to-use" compositions, that is to say, ready for marketing. In an embodiment, the formulation may be obtained by combining a synergistic amount of the active ingredients with an agriculturally acceptable carrier, a surfactant or other application-promoting adjuvant customarily employed in formulation technology. The compositions according to the invention do not only comprise ready-to-use compositions which can be applied with suitable apparatus to the plant or the seed, but also commercial concentrates which have to be diluted with water prior to use.
The treatment according to the invention of the plants and plant parts with the active compounds or compositions is carried out directly or by action on their surroundings, habitat or storage space using customary treatment methods, for example by spraying, rubbing, atomizing, irrigating, evaporating, dusting, fogging, broadcasting, pouring, mist blowing, soil mixing, foaming, painting, spreading-on, drenching, dipping or drip irrigation and, in the case of propagation material, in particular in the case of seeds, a water-soluble powder for slurry treatment, by incrusting, by coating with one or more layers, etc. It is furthermore possible to apply the active compounds by the ultra-low volume method, or to inject the active compound preparation or the active compound itself into the soil.
In an embodiment, the kit-of-parts comprises an instructions manual, said instructions manual comprising instructions directing a user to admix the components before being used.
The synergistic herbicidal composition of the present invention can be also employed to promote non selection and selective herbicidal action in fallow land, non-cropped industrial land, road and highway sides.
The process for preparing the present novel synergistic herbicidal composition can be modified accordingly by any person skilled in the art based on the knowledge of manufacturing of the formulation. However, all such variation and modification are still covered by the scope of present invention.
Thus, before describing the present invention in detail, it is to be understood that this invention is not limited to particularly exemplified systems or process parameters that may of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments of the invention only and is not intended to limit the scope of the invention in any manner. The use of examples anywhere in this specification including examples of any terms

discussed herein is illustrative only, and in no way limits the scope and meaning of the invention or of any exemplified term. Likewise, the invention is not limited to various embodiments given in this specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the case of conflict, the present document, including definitions will control.
In order that the present invention may be more readily understood, reference will now be made, by way of example, to the following description. It will be understood that the specification and examples are illustrative but not limitative of the present invention and that other embodiments within the spirit and scope of the invention will suggest themselves to those skilled in the art. Other embodiments can be practiced that are also within the scope of the present invention. The following illustrations of examples are intended to illustrate a stable synergistic fungicidal composition, but in no way limit the scope of the present invention.
The process for preparing the present novel synergistic composition can be modified accordingly by any person skilled in the art based on the knowledge of manufacturing of the formulation. However, all such variation and modification are still covered by the scope of present invention.
Inventors of the present invention succeeded in providing stable compositions of the synergistic combination of:
a) at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts;
b) at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron, Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron, Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts; and
c) at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin, Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts.
d) One or more of agrochemically acceptable excipients
In one embodiment of the present invention, the herbicidal composition comprises:
a. at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts in the range of 5-50% by weight of the formulation; and

b. at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron,
Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron,
Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts in the
range of 0.1-30% by weight of the formulation; and
c. at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin,
Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts in
the range of 5-75% by weight; and
d. One or more of agrochemically acceptable excipients
The invention is illustrated by the experiments as exemplified below. Examples
A stable Suspension Concentrate (SC) of Ametryn, 2, 4-D, dimethyl amine salt and Halosulfuron methyl according to the present invention was prepared as follows:

SC (Suspension Concentrate)
Sr.
No. Component Composition

1 2 3 4 5
1 Ametryn Technical 30 35 25 5 40
2 2,4-D, Dimethyl Amine Salt Technical 5 6 7 5 5
3 Halosulfuron Methyl Technical 0.1 0.1 0.1 0.1 0.1
4 Acrylic Copolymer 3.00 3.00 3.00 3.00 3.00
5 Naphthalene sulfonic acid,sodium salt condensate with formaldehyde 4.00 4.00 4.00 4.00 4.00
6 Blend of Poly terpene Resin 1.00 1.00 1.00 1.00 1.00
7 Silicone Antifoam 0.50 0.50 0.50 0.50 0.50
8 Benzisothiazoline 0.10 0.10 0.10 0.10 0.10
9 Glycol 5.00 5.00 5.00 5.00 5.00
10 Polysaccharides 0.10 0.10 0.10 0.10 0.10
11 DM water QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100
Example 1:

Sr. No. Recipe % w/w
1 Ametryn Technical 5-75%
2 2,4-D, Dimethyl Amine Salt Technical 5-50%
3 Halosulfuron Methyl Technical 0.1-
30%

4 Dispersing Agent- Tristyrylphenol Ethoxylate Amine salt of phosphate tristyryl phenol ethylated /Acrylic Copolymer/ Ethoxylated Tristryl phenol Sulphate,Naphthalene sulfonic acid,sodium salt condensate with formaldehyde,Ethoxylated oleyl cetyl alcohol, Polyalkelene glycol ether 0.5-10%
5 Wetting Agent- Tristyrylphenol ethoxylate nonionic
emulsifier/ Mixture of non-ionic surfactants
& Alkoxyleted Alcohol/Block copolymer,Lauryl sulphate
Salts 0.5-10%
6 Antifoaming Agent-Siloxane polyalkyleneoxide 0.01-
1%
7 Antifreezing Agent- Glycol,Propylene Glycol,Mono ethylene glycol,Glycerin 0.1-
10%
8 Adjuants-Silicone Ethoxylated Oil, Polyvinyl Pyrrolidon,Poly vinyl Alcohol,Blend of poly terpene resin 0.1-
10%
9 Filler- Silicon Dioxide/China -Clay/Kaolin/Talc/starch 0.1-5%
10 Anti-bacterial - Benzisothiazolin-3-one / Formaldehyde 0.01-
1%
11 Polysaccharides/carboxymethyl cellulose/Bentonite Clay 0.01-
3%
12 DM water Q.sto make 100
Total 100
Example 2:

Sr. No. Recipe % w/w
1 Ametryn Technical 30.00%
2 2,4-D, Dimethyl Amine Salt Technical 5.00%
3 Halosulfuron Methyl Technical 0.10%
4 Dispersing Agent- Tristyrylphenol Ethoxylate Amine salt of phosphate 3%
5 Wetting Agent- Block copolymer, 2%
6 Antifoaming Agent-Siloxane polyalkyleneoxide 0.20%
7 Antifreezing Agent- Propylene Glycol 5%
8 Adjuants-Blend of poly terpene resin 1%
9 Filler- China -Clay 1%
10 Anti-bacterial - Benzisothiazolin-3-one 0.10%
11 Polysaccharides 0.10%
12 DM water Q.sto
make
100
Total 100

Process: Required quantity of water, biocide, and defoamer followed by addition of gum powder are homogenized with stirring to obtain a gum solution (Gum Solution should be made 12-18 hour prior to use). Required quantity of DM water, wetting agent, dispersing agent & suspending agents, colourant/dye was added into the charged vessel followed by homogenization for a period of ranging between 45 - 60 minutes using high shear homogeniser to obtain a homogenized slurry. Technical and other remaining adjuvants excluding 'antifreeze & thickeners' were added into the homogenized slurry to obtain a uniform slurry. Half of the quantity of required antifoam agent was added into the slurry. The uniform slurry mixture was then passed through appropriate particle size reduction equipment (Dyno-Mill) until the granule material of the desired particle size was achieved. Remaining half of the quantity of required antifoam agent along with the antifreeze agent was added to the granule material as obtained. Gum solution as obtained in the first step was then added to obtain the suspension concentrate.
A stable Granule (GR) formulation of Ametryn, 2, 4-D, dimethyl amine salt and Halosulfuron methyl according to the present invention was prepared as follows:

GR (Granule)
Sr.
No. Component Composition

1 2 3 4 5
1 Ametryn Technical 10 5 5 15 10
2 2,4-D, Dimethyl Amine Salt Technical 5 10 5 5 5
3 Halosulfuron Methyl Technical 2 5 6 3 7
4 Sodium Polycarboxylate 3.00 3.00 3.00 3.00 3.00
5 Sodium Lauryl Sulfate 4.00 4.00 4.00 4.00 4.00
6 Pigment blue 0.10 0.10 0.10 0.10 0.10
7 Blend of poly terpene resin China Clay 0.50 0.50 0.50 0.50 0.50
9
5.00 5.00 5.00 5.00 5.00
10 DM water 1.00 2.00 1.00 2.00 1.00
11 Sand QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100
Example 3:

Sr. No. Recipe % w/w
1 Ametryn Technical 5.00%
2 2,4-D, Dimethyl Amine Salt Technical 5.00%
3 Halosulfuron Methyl Technical 2.00%
4 Dispersing Agent- Calcium Ligno sulphate 3%

5 Pigment Blue 0.20%
6 Filler- China -Clay 5%
7 Adjuvants-Polyvinyl pyrolliddone 0.10%
8 DM water 1%
9 Sand Q.sto
make
100
Total 100
Process: Required quantity of filler, wetting agent, dispersing agent, and suspending agent, & technical was mixed in a premixing blender for homogenization for a period of 30 minutes to obtain a pre-blended material. The pre-blended material as obtained in the first step was blended through Jet mill/ air classifier mills followed by blending in post blender for a period of ~1.5 hour to obtain a homogeneous mixture. Then required quantity of sand was charged in the granulator, later DM water sticking agent and remaining material was added till it became homogeneous. The finely grinded material was then completely coated on sand and the resulting formulation was blended for 30 minutes to obtain the granule formulation.
A stable Water Dispersible Granule (WG) of Ametryn, 2, 4-D, dimethyl amine salt and Halosulfuron methyl according to the present invention was prepared as follows:

WG (Water Dispersible Granule)
Sr.
No. Component Composition

1 2 3 4 5
1 Ametryn Technical 75 20 20 20 5
2 2,4-D, Dimethyl Amine Salt Technical 5 10 15 20 20
3 Halosulfuron Methyl Technical 0.1 30 20 25 0.2
4 Sodium Polycarboxylate 8.00 11.00 10.00 1.00 10.00
5 Sodium Lauryl Sulfate 6.00 7.00 4.00 5.00 4.00
6 Sodium ligno sulfonate 2.00 1.00 1.00 1.00 1.00
7 Sodium alkylnaphthalenesulfonate, formaldehyde condensate 0.50 0.50 0.50 0.50 0.50
8 Silicone based antifoam 0.10 0.10 0.10 0.10 0.10
9 Blend of poly terpene resin 0.10 0.10 0.10 0.10 0.10
10 Precipitated Silica 0.10 20.00 20.00 20.00 20.00
11 China Clay QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100

Example 4:

Sr.
No. Recipe % w/w
1 Ametryn Technical 30.00%
2 2,4-D, Dimethyl Amine Salt Technical 10.00%
3 Halosulfuron Methyl Technical 30.00%
5 Dispersing Agent-Sodium Polycarboxylate 3.00
6 Wetting Agent-Sodium Lauryl Sulfate 4.00
7 DispersingSodium alkyl naphthalene sulfonate blend 1.00
8 Adjuvants-Polyvinyl pyrolliddone 0.10
9 Antifoam-Polydimethyl Siloxane 0.10
10 Filler-China Clay QSto
Make
100
Process: Required quantity of filler, wetting agent, dispersing agent, and suspending agent, & technical was mixed in a premixing blender for homogenization for a period of 30 minutes to obtain a pre-blended material. The pre-blended material as obtained in the first step was blended through Jet mill/ air classifier mills followed by blending in post blender for a period of ~1.5 hour to obtain a homogeneous mixture. Required quantity of water (qs) was then added to make a dough. The dough was then passed through the extruder to obtain granules of required size. Wet granules as obtained were passed through the fluidised bed drier followed by grading using vibrating screens to obtain the wettable granules.
A stable Wettable Powder (WP) of Ametryn, 2, 4-D, dimethyl amine salt and Halosulfuron methyl according to the present invention was prepared as follows:

WP (Wettable Powder)
Sr.
No. Component Composition

1 2 3 4 5
1 Ametryn Technical 75 20 20 20 5
2 2,4-D, Dimethyl Amine Salt Technical 5 7 10 10 10
3 Halosulfuron Methyl Trechnical 0.1 30 20 25 0.2
4 Sodium Polycarboxylate 8.00 8.00 8.00 8.00 8.00
5 Sodium Lauryl Sulfate 5.00 5.00 5.00 5.00 5.00
6 Blend of poly terpene resin 1.00 1.00 1.00 1.00 1.00
7 Sodium alkylnaphthalenesulfonate, formaldehyde condensate 0.50 0.50 0.50 0.50 0.50
8 Silicone based antifoam 0.10 0.10 0.10 0.10 0.10

9 Starch 5.00 5.00 5.00 5.00 5.00
10 Precipitated Silica 0.10 0.10 0.10 0.10 0.10
11 China Clay QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100 QSto
Make
100
Example 5:

Sr.
No. Recipe % w/w
1 Ametryn Technical 40.00%
2 2,4-D, Dimethyl Amine Salt Technical 5.00%
3 Halosulfuron Methyl Technical 20.00%
5 Dispersing Agent-Sodium ligno sulfonate 3.00
6 Wetting Agent-Sodium Lauryl Sulfate 4.00
7 Dispersing Sodium alkyl naphthalene sulfonate blend 1.00
8 Adjuvants-Polyvinyl pyrolliddone 1.00
9 Antifoam-Polydimethyl Siloxane 0.10
10 Filler-China Clay QSto
Make
100
Process: Required quantity of filler, wetting agent, dispersing agent, and suspending agent, & technical were charged in premixing blender for homogenization for a period of 30 minutes to obtain a pre-blended material. The pre-blended material was grinded through Jet mill/ air classifier mills followed by blending in post blender for a period of -1.5 hr to obtain a homogeneous material. The homogenous material as obtained was unloaded and analysed.
Biological Examples:
Bio-efficacy studies
Bio-efficacy of the herbicidal composition of the present invention:
The synergistic effect and efficacy of herbicidal action of the inventive composition can be demonstrated by the experiments below. A synergistic effect exists wherever the action of a combination of active ingredients/components is greater than the sum of the action of each of the active ingredients/components taken alone. Therefore, a synergistically effective amount or an effective amount of a synergistic composition or combination is an amount that exhibits greater pesticide activity than the sum of the pesticide activities of the individual components. In the field

of agriculture, it is often understood that the term "synergy" is as defined by Colby S.R. in an article entitled "Calculation of the synergistic and antagonistic responses of herbicide combinations" published in the journal Weeds, 1967, 15, p.20-22, incorporated herein by reference in its entirety. The action expected for a given combination of two active components can be calculated as follows:

Mean Weed Count in untreated Plot-Mean Weed Count in treated plot ~\ „
r
-I
j. , , - i^tLm vrttu Luunt i« Hfiu tuttu nut J»K:UH ruin Luunt iuif cutcu pti/L v -4 f\f% Weed Control- 1 - J Mean Weed Count ln untreated plot 1 X 100
In the field of agriculture, it is often understood that the term "synergy" is as defined by Colby S.R. in an article entitled "Calculation of the synergistic and antagonistic responses of herbicide combinations" published in the journal Weeds, 25 1967, 15, p.20-22, incorporated herein by reference in its entirety. The action expected for a given combination of two active components can be calculated as follows:
Where E = Expected % control by mixture of three products A, B and C in a defined dose
E = X + Y + Z-{XY + YZ + XZ}+( X Y Z )
100 10000
X = Observed % control by product A Y = Observed % control by product B Z = Observed % control by product C
Ratio = Observed Control % Expected Control %
Ratio of O/E > 1, means synergism observed.
In the Colby method, the expected (or predicted) response of a combination of herbicides is calculated by taking the product of the observed response for each individual component of the combination when applied alone divided by 100 and subtracting this value from the sum of the observed response for each component when applied alone. An unexpected enhancement in

efficacy of the combination is then determined by comparing the observed response of the combination to the expected (or predicted) response as calculated from the observed response of each individual component alone. If the observed response of the combination is greater than the expected (or predicted) response, or stated conversely, if the difference between the observed and expected response is greater than zero, then the combination is said to be synergistic or unexpectedly effective, (Colby, S. R,: 25 Weeds, 1967(15), p. 20-22}. The Colby method requires only a single dose of each herbicide applied alone and the mixture of both doses. The formula used to calculate the expected efficacy (EE) which was compared with the observed efficacy (OE) to determine the efficacy of the present invention is explained herein below.
The herbicidal action of the present invention was demonstrated by the following field experiments.
Field experiment on Bio-efficacy and phytotoxicity on Sugarcane crop
The field experiment was conducted on Sugarcane crop in Village Almorah, Uttar Pradesh and the experimental details are as below:

Crop & Variety: Sugarcane
RBD Experimental design with 3 Replications
No.of Treatments: 37
Treatment Plot size in Sugarcane field.: 8X8 M
Application Time: 30 DAP (Days after planting Sugarcane crop), when weeds are 3-7 leaf stage and active growing stage.
Observations: 20 DAA (days after application) of herbicide treatments for phytotoxicity and 10 and 20 DAA (Days after Application) for bio-efficacy against mixed weed flora.
Spray Volume: 500 litre water per hectare
Application Equipment: Hand operated Knapsack sprayer fitted with Flat fan nozzle.
Experiment Details: Sugarcane crop was raised as per the standard agronomic practices in the field to conduct a trial to assess phytotoxicity of different inventive synergistic mixtures as tank

mixture as well ready to use ternary composition of the present invention. The trial was laid out in Randomized Block Design (RBD) with 33 treatments including untreated check (UTC), replicated three times. For each treatment plot size of 40 sq. mt was maintained. The application of different treatments with prescribed doses was done with manually operated knapsack sprayer fitted with flat fan nozzle. The spray volume was used at 375 1/h for spraying. The Untreated check plot was sprayed with water alone. Observations on phytotoxicity viz., yellowing, stunting, epinasty and hyponasty was recorded at 10 and 20 days after spraying, by adopting 0-10 rating scale as below:
0= No phytotoxicity, 1 =1-10%, 2=11-20%, 3=21-30%, 4=31-40%, 5=41-50%, 6=51-60%, 7=61-70%, 8=71-80%, 9=81-90% and 10=91-100% phytotoxicity Percent phytotoxicity was calculated by following formula:

% Phytotoxicity^ (
LNo.of

Sum of All Scores
samples X Highest rating scale

}

100

Class wise (Broad leaved weeds, grassy and sedges) as well as Species wise weed count recorded at 15 and 30 DAA (Days After Application) by using 0.25 m2 quadrant at minimum 3 places randomly selected in the each treatment plot. The average of each variable was used together with the sum of all the variables per plot to calculate the percentage of weed control.
Efficacy was tested against following weeds:

Broad Leaved Weeds Grasses & sedges
Boerhaavia diffusa, Trianthema
portulacastrum, Chenopodium album,
Amaranthus spp., Phyllanthus niruri,
Tribulus terristris, Portulaca oleracea,
Xanthium spp., Convonvulus arevensis,
Digera arvensis, Celosia argentina Echinochloa sp., Brachiaria sp.,
Cyperus rotundus, Cyperus iria,
Digitaria spp., Eleusine spp.
53% of total weed flora 47% of total weed flora

Table 1

Second
active
Compound Dose Rate First active compound -methyl - Halosulfuron Third active Compound Dose Rate
g a.i./ha Dose Rate (g a.i./ha)
g a.i./ha
2.4-D (Dimethyl amine salt) 0 0 25 50 100 Ametryn 0.00

688 0 25 50 100
750.00
1375 0 25 50 100
1500.00
2750 0 25 50 100
2000.00
Table 2

Halosulfuron
methyl @ 20
DAT 2,4-D I amine
20] )im ethyl ; salt @ DAT Ametryn @ 20 DAT Halosulfuron methyl + 2,4-D Dimethyl amine salt + Ametryn @ 20DAT
tmen
s g a.i./h %
Weed
Control g a.i./h %
Weed
Control g a.i./h %
Weed
Control g a.i./h %
Weed
Control Colby
Expecte
d%
Weed Control Colby
ratio =
observed
%/
Expected
%
i 25 37.55 688 10 750 19.33 25+688+ 750 53.33 54.66 0.98
\ 25 37.55 1375 28.66 1500 34 25+1375+ 1500 70 70.60 0.99
"3 25 37.55 2750 30 2000 44.55 25+2750+ 2000 73.67 75.76 0.97
"4 50 65.11 688 10 750 19.33 50+688+ 750 63.87 74.67 0.86
"5 50 65.11 1375 28.66 1500 34 50+1375+ 1500 92.67 83.57 1.11
6 Exemplary composition of present invention @
(Halosulfuron methyl 1.33% + 2,4-D amine 36.67 % +
Ametryn 40) WG @ 3750 g/ha 50+1375+ 1500 97.87 83.57 1.17
"V 50 65.11 2750 22 2000 44.55 50+2750+ 2000 94.33 84.91 1.11
8 100 65.92 688 10 750 19.33 100+688+ 750 72.33 75.26 0.96
9 100 65.92 1375 28.66 1500 34 100+1375 +1500 93.67 83.95 1.12
10 100 65.92 2750 25 2000 44.55 100+2750 +2000 94 85.83 1.10
11 50 65.11 1375 32.33 0 0 50+1375+ 0 71.33 76.39 0.93

12 50 65.11 0 0 1500 34 50+0+ 1500 67 76.97 0.87
13 0 0 1375 28.66 1500 34 0+1375+ 1500 43.87 52.92 0.83
14 0 0 3500 43.33 0 0 0+3500+0 43.33 - -
From Table 2 it can be observed that Halosulfuron methyl solo @ 25g, 50g and lOOg a.i./ha was very effective against sedges and annual grasses and the average % weed control was 37.55%, 65.11% and 66%) respectively. Similarly in case of solo 2,4-D amine salt at various doses ranging from 688g to 2750g a.i/ha, the average % weed control was 10%> to 43.33%. It was found mainly effective against broad leaved weeds. In case of solo Ametryn at various doses ranging from 750g to 1500g i.i/ha the % weed control was recorded from 19%> to 44%. However, when applied as ternary combination the most promising dose of application was found to be the exemplary embodiment of the present invention i.e. Halosulfuron methyl 1.33%+ 2,4- D Amine salt 36.67%+ Ametryn 40% WD @ (50 + 1375 + 1500) i.e. a total of 3750g/ha.
Thus, in view of the table above synergistic and effective weed control was observed by the composition of the present invention as compared to the compositions known in the art.
Phytotoxicity Observations
For phytotoxicity evaluation on sugarcane and potato, following observations were made by observing temporary or long lasting damage to the leaves if any viz., leaf injury on tips and leaf surface, wilting, epinasty and hyponasty at 10 and 20 days after spray of the synergistic herbicidal composition of the present invention. Crop injury was observed on visual rating from 1-10 scale as given in table below:
Table 3

Rating Crop Injury (%) Verbal Description
0 - No symptoms
1 1-10 Very slight discoloration
2 11-20 More severe, but not lasting
3 21-30 Moderate and more lasting
4 31-40 Medium and lasting
5 41-50 Moderately heavy

6 51-60 Heavy
7 61-70 Very Heavy
8 71-80 Nearly destroyed
9 81-90 Destroyed
10 91-100 Completely destroyed
Table 4

lents Dose Dose Formulations Yellowing % Stunting % Epinasty % Hyponasty %

g a.i./ha g/Ha 10 DAA 20 DAA 10 DAA 20 DAA 10 DAA 20 DAA 10 DAA 20 DAA
25+688+750 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (33.33+1185+937) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
25+1375+1500 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (33.33+2370+1875) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
25+2750+2000 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (33.33+4741+2500) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
50+688+750 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (67+1185+937) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
50+1375+1500 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (67+2370+1875) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

50+1375+1500 (Halosulfuron methyl 1.33% + 2,4-D amine salt 36.67% + Ametryn 40%) WS @ 3750 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
50+1375+1500 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (67+4741+2500) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
100+688+750 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (133+1185+937) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
100+1375+1500 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (133+2370+1875) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0 100+2750+2000 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (133+4741+2500) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1 50+1375+0 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (67+2370+0) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
2 50+0+1500 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (67+0+1875) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
3 0+1375+1500 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (0+2370+1875) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

4 0+3500+0 Halosulfuron methyl 75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG @ (0+6035+0)g/ha 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
The results of the field trial on sugarcane phytotoxicity presented in Table 4 indicates that the inventive composition of present invention did not cause any significant visible damage to sugarcane crop in terms of loss of pigmentation, crop growth, crop vigour etc.
Study of the residual effect on the succeeding crop:
The impact of the above treatments on the succeeding crop of Potato was also studied in the following season after the harvest of Sugarcane crop, and germination and crop growth parameters were studied and evaluated. It was found that the emergence of Potato crop was unaffected in treated as compared to the control plots. In particular, no crop abnormality in crop emergence (germination) as well on the crop foliage for potato crop was found.
Table 5

Dose Dose Formulations Emerge nce% 15DAS Yellowing (%) Stunting % Epinasty % Hyponasty %
g a.i./ha g/Ha
10 DAA 20 DAA 10 DAA 20 DAA 10 DAA 20 DAA 10 DAA 20 DAA
25+688+ 750 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (33.33+1185+ 937) 100 0 0 0 0 0 0 0 0
25+1375 +1500 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (33.33+2370+ 1875) 100 0 0 0 0 0 0.00 0.00 0

25+2750 +2000 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (33.33+4741+ 2500) 100 0 0 0 0 0 0.00 0.00 0
50+688+ 750 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (67+1185+937 ) 100 0 0 0 0 0 0.00 0.00 0
50+1375 +1500 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (67+2370+187 5) 100 0 0 0 0 0 0.00 0.00 0
50+1375 +1500 (Halosulfuron methyl 1.33% + 2,4-D amine salt 36.67% + Ametryn 40%) WS @ 3750 2100 0 0 0 0 0 0.00 0.00 0
50+1375 +1500 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (67+4741+250 0) 100 0 0 0 0 0 0.00 0.00 0
100+688 +750 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (133+1185+93 7) 100 0 0 0 0 0 0.00 0.00 0

T9 100+137 5+1500 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (133+2370+18 75) 100 0 0 0 0 0 0.00 0.00 0
Tio 100+275 0+2000 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (133+4741+25 00) 100 0 0 0 0 0 0.00 0.00 0
Tn 50+1375 +0 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (67+2370+0) 100 0 0 0 0 0 0.00 0.00 0
T12 50+0+15 00 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (67+0+1875) 100 0 0 0 0 0 0.00 0.00 0
T13 0+1375+ 1500 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ (0+2370+1875 ) 100 0 0 0 0 0 0.00 0.00 0
T14 0+3500+ 0 Halosulfuron methyl
75%WG + 2,4-D Amine salt 58% SL + Ametryn 80% WDG@ 99.13 0 0 0 0 0 0.00 0.00 0

(0+6035+0)g/ ha
5 *DAS: Days after sowing
Storage stability and shelf life study
Table 6 (Storage Stability test of the composition of present invention)

Parameters Specification (In House) Initial Cold
storage
stability at
0 + 2°C
for 14
days Heat stability study at
54 + 2 °C
for 14
days Heat stability study at
54 + 2 °C
for 21
days Heat stability study at
54 + 2°C
for 28
days Heat stability study at
54 + 2 °C
for 35
days Heat stability study at
54 + 2 °C
for 42
days
Description Off-white to light brown Complies Complies Complies Complies Complies Complies Complies
Ametryn Content 38-42 40.9 40.9 40.7 40.6 40.4 40.2 40.1
Ametryn Suspensibility Min 60% 97.6 97.5 97.4 97.3 97.2 97.5 97.1
2,4-D, Dimethyl amine salt Content 29.93-33.07 32.5 32.5 32.4 32.3 32.1 32 31.8
2,4-D, Dimethyl amine salt Suspensibility Min 60% 99.3 99.3 98.7 98.5 98.4 98.2 97.9
Halosulfuron
Methyl
Content 1.43-1.65 1.63 1.63 1.61 1.59 1.58 1.57 1.55
Halosulfuron
Methyl
Suspensibility Min. 60 99.9 99.8 99.8 99.7 99.7 99.6 99.5
pH(l%
aqeous
Solution) 4 to 9 6.5 6.5 6.5 6.5 6.5 6.5 6.5
Wettability Max 120 s 67 67 67 67 67 67 67
Wet
Sieve(Passes through 75 micron) Min 98.0% 99.5 99.4 99.4 99.4 99.4 99.4 99.4
Bulk Density 0.25-0.85 0.54 0.54 0.54 0.54 0.54 0.54 0.54
Moisture Content Max 5.0% 1.6 1.6 1.6 1.6 1.6 1.6 1.6
10

5 Shelf Life/Room Temperature storage data- Details Table 7

Parameters Specification Study Duration

In House 1 month 6 months 12 months 24 months 30 months 36 months 42 months
Description Off-white to light brown Complies Complies Complies Complies Complies Complies Complies
Ametryn Content 38-42 40.9 40.9 40.7 40.6 40.5 40.3 40.1
Ametryn Suspensibility Min 60% 97.6 97.4 97.4 97.3 97.2 97.5 97.1
2,4-D, Dimethyl amine salt Content 29.93-33.07 32.5 32.5 32.4 32.3 32.2 32 31.8
2,4-D, Dimethyl amine salt Suspensibility Min 60% 99.3 99.1 98.9 98.5 98.4 98.2 97.9
Halosulfuron Methyl Content 1.43-1.65 1.63 1.62 1.62 1.6 1.58 1.57 1.55
Halosulfuron
Methyl
Suspensibility Min. 60 99.9 99.8 99.8 99.7 99.7 99.6 99.5
pH(l%aqeous Solution) 4 to 9 6.5 6.5 6.5 6.5 6.5 6.5 6.5
Wettability Max 120 s 67 67 67 67 67 67 67
Wet
Sieve(Passes through 75 micron) Min 98.0% 99.5 99.4 99.4 99.4 99.4 99.4 99.4
Bulk Density 0.25-0.85 0.54 0.54 0.54 0.54 0.54 0.54 0.54
Moisture Content Max 5.0% 1.6 1.6 1.6 1.6 1.6 1.6 1.6
The shelf life of commercially available formulation comprising individual/solo herbicides is 2
10 years. However, the composition of the present invention is found to be stable for at least 42
months.
From the foregoing it will be observed that numerous modifications and variations can be
effectuated without departing from the true spirit and scope of the novel concepts of the present
invention. It is to be understood that no limitations with respect to the specific embodiments
15 illustrated is intended or should be inferred. It should be understood that all such modifications
and improvements have been deleted herein for the sake of conciseness and readability but are properly within the scope of the following claims.

WE CLAIM:
[CLAIM 1]. A synergistic herbicidal composition comprising of:
a. at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D
ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts; and
b. at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron,
Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron,
Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts; and
c. at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin,
Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts
and
d. One or more of agrochemically acceptable excipients
[CLAIM 2]. A synergistic herbicidal composition as claimed in claim 1 comprising of:
a. at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D
ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts in the range of 5-
50% by weight of the formulation; and
b. at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron,
Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron,
Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts in the
range of 0.1-30% by weight of the formulation; and
c. at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin,
Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts in
the range of 5-75% by weight; and
d. One or more of agrochemically acceptable excipients
[CLAIM 3]. A synergistic herbicidal composition comprising of:
a. at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D
ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts in the range of 5-
50%) by weight of the formulation; and
b. at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron,
Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron,

Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts in the range of 0.1-30% by weight of the formulation; and c. at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin, Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts in the range of 5-75% by weight; and
d. organosilicone surfactants as spreading and sticking agents and bio based efficacy
enhancing agents.
e. One or more of agrochemically acceptable excipients
[CLAIM 4]. The herbicidal composition as claimed in claim 1 or 3, wherein phenoxyacetic herbicide is 2, 4-D dimethyl amine.
[CLAIM 5]. The herbicidal composition as claimed in claim 1 or 3, wherein sulfonylurea herbicide is Halosulfuron-methyl.
[CLAIM 6]. The herbicidal composition as claimed in claim 1 or 3, wherein triazine herbicide is Ametryn.
[CLAIM 7]. The herbicidal composition as claimed in claim 1 or 3, wherein the agrochemically acceptable excipients are excipients are surfactant/dispersing agent, anti-freezing agent, anti-foaming agent, wetting agent, suspension aid, antimicrobial/anti-bacterial agent, thickener, quick coating agent or sticking agents/sticker, spreader, binders, adjuvants, fillers, emulsifiers, coloring pigments, dyes, preservatives and buffering agent thereof.
[CLAIM 8]. The herbicidal composition as claimed in claim 3, wherein the agrochemically acceptable adjuvants are selected from Silicone Ethoxylated Oil, Polyvinyl Pyrrolidon, Polyvinyl Alcohol, blend of poly terpene resin or mixtures thereof and present in the range of 0.1-10% weight of the total composition.
[CLAIM 9]. The herbicidal composition as claimed in claim 3, wherein organosilicone surfactant/adjuvant is trisiloxane ethoxylate and present in the range of 0.1-10%) weight of the total composition.

[CLAIM 10]. The herbicidal composition as claimed in claim 3, wherein bio based efficacy enhancing agent is blend of polyterpene resin (natural oils) and present in the range of 0.1-10% weight of the total composition.
[CLAIM 11]. The herbicidal composition as claimed in claim 1 or 3, wherein agrochemically acceptable wetting agent is selected form the group consisting of sodium lauryl sulphate; sodium dioctylsulphosuccinate; Tristyrylphenol ethoxylate non-ionic emulsifier/ mixture of non-ionic surfactants & Alkoxylated Alcohol/Block copolymer, alkyl phenol ethoxylates; and aliphatic alcohol ethoxylates, their salts and mixtures thereof and is present in the range of 0.5-10% weight of the total composition.
[CLAIM 12]. The herbicidal composition as claimed in claim 1 or 3, wherein agrochemically acceptable surfactants/dispersing agent is selected form the group consisting of sodium lignosulphonates; Tristyrylphenol Ethoxylate Amine salt of phosphate tristyryl phenol ethylated /Acrylic Copolymer/ Ethoxylated Tristryl phenol Sulphate,Naphthalene sulfonic acid,sodium salt condensate with formaldehyde,Ethoxylated oleyl cetyl alcohol, Polyalkelene glycol ethersodium naphthalene sulphonate formaldehyde condensates; tristyrylphenolethoxylate phosphate esters; aliphatic alcohol ethoxylates; alky ethoxylates; EO-PO block copolymers; and graft copolymers or mixtures thereof and present in the range of 0.5-10%) weight of the total composition.
[CLAIM 13]. The herbicidal composition as claimed in claim 1 or 3, wherein agrochemically acceptable antifoaming agent is selected form the group consisting of silicon emulsion based anti-foam agents, Siloxane polyalkyleneoxide, trisiloxane ethoxylates and mixtures thereof and present in the range of 0.01-1%) weight of the total composition.
[CLAIM 14]. The herbicidal composition as claimed in claim 1 or 3, wherein agrochemically acceptable antifreezing agent is selected from the group consisting of polyethylene glycols, methoxypolyethylene glycols, propylene glycol, polypropylene glycols, polybutylene glycols, glycerine, ethylene glycol and mixtures thereof and present in the range of 0.1-20%> weight of the total composition.
[CLAIM 15]. The herbicidal composition as claimed in claim 7, wherein emulsifiers are selected from Castor oil ethoxylates, Calcium alkyl benzene sulfonate or mixtures thereof and present in the range of 0.1-10%) weight of the total composition.

[CLAIM 16]. The herbicidal composition as claimed in claim 1 or 3, wherein agrochemically acceptable thickening agent/thickener is selected from the group consisting of montmorillonite, bentonite clay; magnesium aluminum silicate; attapulgite; natural extracts of seeds and seaweeds; guar gum; locust bean gum; carrageenam; xanthan gum; alginates; polysaccharides, methyl cellulose; sodium carboxymethyl cellulose (SCMC); hydroxyethyl cellulose (HEC), bentonite clay, modified starches, polyacrylates, polyvinyl alcohol and polyethylene oxide or mixtures thereof and present in the range of 0.01-3% weight of the total composition
[CLAIM 17]. The herbicidal composition as claimed in claim 1 or 3, wherein agrochemically acceptable antimicrobial/anti-bacterial agent is selected from the group consisting of propionic acid and its sodium salt; sorbic acid and its sodium or potassium salts; benzoic acid and its sodium salt; hydroxy benzoic acid sodium salt; methyl p-hydroxy benzoate; and biocide such as sodium benzoate, l,2-benzisothiazoline-3-one, 2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, potassium sorbate, parahydroxy benzoates, Benzisothiazolin-3-one / Formaldehyde or mixtures thereof and present in the range of 0.01-1% weight of the total formulation.
[CLAIM 18]. The herbicidal composition as claimed in claim 1 or 3, wherein agrochemically acceptable filler is selected from the group consisting of Silicon Dioxide, bentonite clay, china clay, silica, kaolin, talc, starch and diatomaceous earth and mixtures thereof and present in the range of 0.1-5%) weight of the total composition.
[CLAIM 19]. The herbicidal composition as claimed in claim 1 or 3, wherein the formulation is in the form of Capsule suspension (CS), Dispersible concentrate (DC), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsion, water in oil (EO), Emulsion for foliar spray (ES), Emulsion, oil in water (EW), Flowable suspension/concentrate for foliar spray (FS), Granule/ soil applied (GR), Controlled (Slow or Fast) release granules (CR), Jambo balls or bags (bags in water soluble pouch), Solution for foliar spray (LS), Micro-emulsion (ME), Oil dispersion (OD), Oil miscible flowable concentrate (oil miscible suspension (OF), Oil miscible liquid (OL), Suspension concentrate (flowable concentrate) (SC), Suspo-emulsion (SE), Water soluble granule (SG), Soluble concentrate (SL), Water soluble powder (SP), Water dispersible granule (WG or WDG), Wettable powder (WP), Water dispersible powder

for slurry treatment (WS), A mixed formulation of CS and SC (ZC), mixed formulation of CS and SE (ZE), mixed formulation of CS and EW (ZW) or combination thereof.
[CLAIM 20]. The herbicidal composition as claimed in claim 1 or 3, wherein the formulation is applied to a plant/crop by spraying, rubbing, atomizing, irrigating, evaporating, dusting, fogging, broadcasting, pouring, mist blowing, soil mixing, foaming, painting, spreading-on, drenching, dipping or drip irrigation.
[CLAIM 21]. The herbicidal composition as claimed in claim 1 or 3, wherein higher dosage of the composition is applied to the soil for treatment of weeds in non-crop areas.
[CLAIM 22]. The herbicidal composition as claimed in claim 1 or 3, exhibits herbicidal activity against broad leaved weeds, grasses and sedges.
[CLAIM 23]. The herbicidal composition as claimed in claim 1 or 3, which is safe to crop and has no adverse effect on germination or growth of succeeding crops.
[CLAIM 24]. The herbicidal composition as claimed in claim 1 or 3, which is applied as an early post emergence to late post emergence (3-12 leaf stage of weeds)
[CLAIM 25]. The herbicidal composition as claimed in claim 1 or 3, which exhibits herbicidal activity against highly resistant and hard to kill weeds including Cyperus genera weeds.
[CLAIM 26]. The herbicidal composition as claimed in claim 1 or 3, which is applied in one shot application for killing/ controlling highly resistant broad leaved weeds, grasses and sedges at lower application rates.
[CLAIM 27]. The herbicidal composition as claimed in claim 1 or 3, which provides excellent crop safety in terms of no phytotoxicity and no adverse effect on germination or growth of succeeding crops due to reduced amount of dosage.
[CLAIM 28]. A kit-of-parts comprising a plurality of components, wherein said plurality of components comprises:
a. at least one phenoxyacetic herbicide selected from 2,4-D dimethyl amine salt, 2.4-D ethyl ester, 2,4-D sodium salt or its agrochemically acceptable salts in the range of 5-50% by weight of the formulation; and

b. at least one sulfonylurea herbicide selected form Chlorimuron-ethyl, Cyclosulfuron,
Halosulfuron, Halosulfuron-methyl, Metsulfuron, Prosulfuron, Primisulfuron,
Sulfometuron, Thifensulfuron-methyl or its agrochemically acceptable salts in the
range of 0.1-30% by weight of the formulation; and
c. at least one another triazine herbicide selected from Ametryn, Atrazine, Metribuzin,
Cyanazine, Prometon, Hexazinone, Simazine or its agrochemically acceptable salts in
the range of 5-75% by weight; and
d. One or more of agrochemically acceptable excipients