DESC:FORM 2

THE PATENTS ACT, 1970
(SECTION 39 OF 1970)
&
The Patents Rules, 2003

COMPLETE SPECIFICATION
(Section 10 and Rule 13)

SYNERGISTIC INSECTICIDAL ORGANOTHIOPHOSPHATE AND PYRETHROID COMBINATION FORMULATIONs, PROCESS FOR PREPARING AND USE THEREOF

We, COROMANDEL INTERNATIONAL LIMITED,
an Indian company incorporated under Companies Act of 1956, having its principal place of business at Coromandel House, Sardar Patel Road, Secunderabad – 500 003, Telangana, India.

The following specification particularly describes the invention and the manner in which it is to be performed:
FIELD OF THE INVENTION
The present invention relates to synergistic insecticidal composition comprising combination of an organothiophosphate and a pyrethroid.

The present invention also relates to synergistic insecticidal composition comprising combination of an organothiophosphate, a pyrethroid, silicone wetting agent and surfactant.

The present invention also relates to synergistic insecticidal composition comprising combination of an organothiophosphate, a pyrethroid, silicone wetting agent, surfactant and other agrochemical auxiliaries.

The present invention specifically relates to emulsifiable concentrate (EC) composition comprising combination of Phenthoate, Cypermethrin, silicone wetting agent, surfactant and other agrochemical auxiliaries.

The present invention specifically relates to emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio of 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, more preferably in the ratio of 1 : 7.5 to 7.5 : 1, silicone wetting agent, surfactant and other agrochemical auxiliaries.

The present invention also relates to a process for the preparation of emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin, wherein the emulsifiable concentrate is prepared by simple mixing process.

BACKGROUND OF THE INVENTION
Phenthoate is a non-systemic organophosphorus insecticide; a cholinesterase inhibitor with contact and stomach poisoning; moderately toxic to mammals with no residual activity. Phenthoate formulation has a board spectrum of effectiveness on crop pests especially against a wide range of chewing and piercing-sucking phytophagous insect pests on vegetables, rice, cotton, pulses etc. It is used against Lepidoptera, Jassids, Aphids, Soft scales, Mosquitoes, Blowflies, Houseflies, and Ked. Phenthoate was first registered for use by the United States Environmental Protection Agency (U.S.EPA) in September, 1974.

Phenthoate is chemically known as S-a-ethoxy carbonyl benzyl O,O-dimethyl phosphorodithioate and has the following structure:

Cypermethrin is a pyrethroid insecticide, which is a synthetic chemical similar to the pyrethrins in pyrethrum extract (which comes from the chrysanthemum plant). Pyrethroids, including Cypermethrin were designed to be effective longer than pyrethrins. Cypermethrin was first registered for use by the United States Environmental Protection Agency (U.S.EPA) in October, 2002.

Cypermethrin is chemically known as 3-(2, 2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylic acid cyano(3-phenoxyphenyl) methyl ester and has the following structure:

Phenthoate insecticide works by contact and stomach poisoning, has no systemic action and has broad spectrum of effectiveness on crop pests (High level of activity against a wide range of chewing and piercing-sucking Phytophathogen insects).

Phenthoate insecticide used to control common insects in rice, vegetables and other crops including brassicas, eggplant, peppers, radish, turnips, carrot, Soybean, Potatoes, Tea, Citrus by controlling insects including Aphids, Houseflies, Blowflies; Scale insects, Leafhoppers, Mealybugs and Mosquitoes.

Cypermethrin is registered for agricultural use as a foliar application on food and feed crops including cotton, pecans, peanuts, broccoli and other Brassicas, and sweet corn. Cypermethrin can be applied to livestock in eartags, and to horses. Cypermethrin is also registered for use on industrial, commercial, and residential sites. It is registered for outdoor use as a soil residual termiticide and to control insect pests such as ants in and on structures, impervious surfaces (in perimeter and crack and crevice treatments) and lawns. Cypermethrin can also be applied indoors to control ants, cockroaches, fleas, and other insects.

Though, conventionally each of these Active ingredients are used individually, combination product is not approved which has applications compared to the mono product. Hence, there is increased interest in the use of active ingredients in combination to give synergistic results.

The given below prior-art references show the use of combinations of Phenthoate and Cypermethrin generically in different ratios.

CN 1229585 A generically enables the combination of organic phosphorus and pyrethroid. However, the specific compositions of Phenthoate and Cypermethrin combination are not disclosed.
US 2008/0176746 A1 generically enable the combination of Phenthoate and Cypermethrin oil suspension concentrate. However, the use of silicone wetting agents was not disclosed.

Accordingly, there is a need in the art to provide insecticidal synergistic compositions which are environmentally safer and stable insecticidal / acaricidal compositions having two active ingredients with different physical and chemical properties with enhanced efficacy and stable product during storage.

It was surprisingly and unexpectedly found by the present inventors that a selective combination composition of two active ingredients comprising Phenthoate and Cypermethrin at a weight in the ratio of 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, silicone wetting agent and surfactant and other agrochemical auxiliaries, possesses enhanced efficacy, improved penetration and long duration control of phytopathogens as compared to its other traditional formulations with long storage stability across a wide temperature range and having no adverse impact on photosynthetic activity in plant and seed quality.

OBJECTIVE OF INVENTION
The main objective of the present invention is to provide synergistic insecticidal composition comprising combination of organothiophosphate and a pyrethroid.

Another objective of the present invention is to provide synergistic insecticidal composition comprising combination of an organothiophosphate, a pyrethroid, silicone wetting agent and surfactant.

Another objective of the present invention is to provide synergistic insecticidal comprising combination of an organothiophosphate, a pyrethroid, silicone wetting agent, surfactant and other agrochemical auxiliaries.

Another objective of the present invention is to provide emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin.

Another objective of the present invention is to provide emulsifiable concentrate composition comprising combination of Phenthoate, Cypermethrin, silicone wetting agent, surfactant and other agrochemical auxiliaries.

Another objective of the present invention is to provide emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio of 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, silicone wetting agent, surfactant and other agrochemical auxiliaries.

Another objective of the present invention is to provide a process for the preparation of emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin wherein the emulsifiable concentrate is prepared by simple mixing process.

SUMMARY OF INVENTION
Accordingly, the present invention provides a synergistic insecticidal composition comprising combination of an organothiophosphate, and a pyrethroid.

In one embodiment, the present invention provides a synergistic insecticidal composition comprising combination of an organothiophosphate, a pyrethroid and a silicone wetting agent.

In another embodiment, the present invention provides a synergistic insecticidal composition comprising combination of an organothiophosphate, a pyrethroid, silicone wetting agent, surfactant and other agrochemical auxiliaries, wherein said organothiophosphate is Phenthoate and said pyrethroid is Cypermethrin.

In another embodiment, the present invention provides synergistic insecticidal composition comprising:
a. an organothiophosphate,
b. a pyrethroid,
c. a silicone wetting agent, and
d. other agrochemical auxiliaries.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising combination of Phenthoate, Cypermethrin and a silicone wetting agent.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising combination of Phenthoate, Cypermethrin, silicone wetting agent, surfactants and other agrochemical auxiliaries.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio of 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, more preferably in the ratio of 1 : 7.5 to 7.5 : 1.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio of 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, more preferably in the ratio of 1 : 7.5 to 7.5 : 1, silicone wetting agent, surfactants and other agrochemical auxiliaries, wherein said other agrochemical auxiliaries are selected from stabilizers and solvents.
In yet another embodiment, the present invention provides an emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, more preferably in the ratio of 1 : 7.5 to 7.5 : 1, poly alkyleneoxide modified trisiloxane and polyalkylene oxide as silicone wetting agent, mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate surfactants, soya oil as stabilizer and C-9 solvent as solvent.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising:
a. 10% to 55% (w/w) of Phenthoate,
b. 1% to 15% (w/w) of Cypermethrin,
c. 0.1% to 5% (w/w) of silicone wetting agent,
d. 1% to 20% (w/w) of surfactants, and
e. 0.1% to 50% (w/w) other additives / auxiliaries.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising:
a. 10% to 55% (w/w) of Phenthoate,
b. 1% to 15% (w/w) of Cypermethrin,
c. 0.1% to 5% (w/w) of silicone wetting agent,
d. 1% to 15% (w/w) of surfactants,
e. 0.1% to 5 % (w/w) of stabilizer, and
f. 0.1% to 45% (w/w) of solvent.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising:
a. 10% to 55% (w/w) of Phenthoate,
b. 1% to 15% (w/w) of Cypermethrin,
c. 0.1% to 5% (w/w) of poly alkyleneoxide modified trisiloxane and polyalkylene oxide,
d. 1% to 15% (w/w) of mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate,
e. 0.1% to 50% (w/w) other additives / auxiliaries.

In another embodiment, the present invention provides an emulsifiable concentrate composition comprising:
a. 10% to 55% (w/w) of Phenthoate,
b. 1% to 15% (w/w) of Cypermethrin,
c. 0.1% to 5% (w/w) of poly alkyleneoxide modified trisiloxane and polyalkylene oxide,
d. 1% to 15% (w/w) of mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate,
e. 0.1% to 5 % (w/w) of soya oil, and
f. 0.1% to 45% (w/w) of C-9 solvent.

In another embodiment, the present invention provides a process for preparing emulsifiable concentrate composition comprising the steps of:
a. adding all the active ingredients, surfactants, silicone wetting agent, stabilizer, hydrocarbon solvent along with other auxiliaries in a vessel, and
b. mixing all the ingredients under continuous stirring to obtain homogenous clear solution.

In another embodiment, the present invention provides a process for preparing emulsifiable concentrate composition comprising the steps of:
a. adding Phenthoate Technical, Cypermethrin Technical, poly alkyleneoxide modified trisiloxane and polyalkylene oxide, mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate, soya oil and C9 solvent in a vessel, and
b. mixing all the ingredients under continuous stirring to obtain homogenous clear solution.

DETAILED DESCRIPTION OF THE INVENTION
The term "comprising", which is synonymous with "including", "containing", or "characterized by" here is defined as being inclusive or open-ended, and does not exclude additional, unrecited elements or method steps, unless the context clearly requires otherwise.

The present invention provides synergistic composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio of 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, more preferably in the ratio of 1 : 7.5 to 7.5 : 1. However, variables of the ratios of each of the active ingredients can be used and the selection of the particular amount is dependent upon many factors including, for example, type of formulations, the crop, disease sought to be controlled and environmental conditions. The selection of the proper quantity of active agent to be applied, however, is within the expertise of one skilled in the art.

The combination compositions of the present invention can be used on a number of fruits, Vegetables and ornamental varieties such as Brassicas, Eggplant, Peppers, Radish, Turnips, carrot, Soybean, Potatoes, Tea and Citrus.

The composition of the present invention could be applied to plants, seeds, fruits, soil as preventive and curative state.

The silicone wetting agent aids in the incorporation to improve the wetting, spreading and penetration of agricultural chemicals especially in the emulsion concentrate formulations. Silicone wetting agents were cost effective and very high performance super wetting and spreading agent and also used as Plant Adjuvant, Sticker, and Spreader.

The silicone wetting agent as used herein is selected from and not limited to poly alkylatedoxide modified trisiloxane >85% and poly alkyleneoxide >10% (RESICARE MSW), Sag-1572, SILFOAM®, SILFAR®, PULPSIL® and WACKER® AK , BREAK-SHOOT. Preferred silicone wetting agent used in the composition of the present invention is poly alkylatedoxide modified trisiloxane >85% and poly alkyleneoxide >10% (RESICARE MSW).

The silicone wetting agent is present in the composition in a range of about 0.1 to 5%, more preferably 0.5 to 4% of the total weight of the composition.

The surfactant is required to maintain the particles in emulsion and prevent them from agglomerating once the emulsion. The surfactant employed in the formulation composition is selected from the group consisting of non-ionic surfactants, anionic surfactant, a mixture of anionic and non-ionic surfactant and polymeric surfactant. Among these preferred surfactant is non-ionic surfactant.

The non-ionic surfactants as used herein are selected from and not limited to fatty acid alkanolamides, the condensation products of fatty acid esters, fatty alcohols, fatty acid amides or fatty amines with ethylene and/or propylene oxide, alkyl- , alkenyl or polyaryl-substituted phenols with ethylene and/or propylene oxide, fatty esters of polyhydric alcohol esters e.g. sorbitan fatty acid esters, condensation product of such esters with ethylene oxide, e.g. polyoxyethylene sorbitan fatty acid esters, block copolymers of ethylene oxide and propylene oxides, ethoxylated lanolin alcohols or ethoxylated lanolin acids from the group consisting of homo- or copolymers of C2-C3-alkylene oxides, polyoxy-C2-C3-alkylene C8-C22-alkyl ethers, polyoxy-C2-C3-alkylene C1-C16-alkylbenzene ethers, polyoxy- C2-C3-alkylene mono-, di- or tristyryl phenyl ethers, polyoxy-C2-C3-alkylene mono- or distyryl phenyl ether-formaldehyde condensates, and acetylene glycols, mixture or blend of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate (Geronil FF4 and Geronil FF6). Preferred non-ionic surfactants used in the composition of the present invention is mixture or blend of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate (Geronil FF4 and Geronil FF6).

Geronil FF4 and Geronil FF6 comprise of same components but in different concentrations.

Geronil FF4 comprising blend of:
calcium dodecylbenzene sulphonate = 40% to < 50%,
2-methylpropan-1-ol (isobutanol) = 30% to < 40%,
poly(oxy-1,2-ethanediyl), .alpha.-[tris(1- phenylethyl)phenyl]-.omega.-hydroxy- (tristyrylphenol ethoxylate) = 15% to < 20%.

Geronil FF6 comprising blend of:
calcium dodecylbenzene sulphonate = 10% to < 15%,
2-methylpropan-1-ol (isobutanol) = 5% to < 10%,
poly(oxy-1,2-ethanediyl), .alpha.-[tris(1-phenylethyl)phenyl]-.omega.-hydroxy- (tristyrylphenol ethoxylate) = 70% to < 80%.

The non-ionic surfactants are present in the composition in a range of about 1% to 15%, more preferably 2% to 10% of the total weight of the composition.

The stabilizer as used herein is selected from and not limited to soya oil, organic phosphoric acid, phosphoamide, butylated hydroxytoluene (BHT), polyethyleneglycol or polypropyleneglycol chain or an ethyleneglycol-propyleneglycol copolymeric chain, or a mixture thereof. Preferred stabilizer used in the composition of the present invention is soya oil.

The stabilizer is present in the composition in a range of about 0.1% to 5%, more preferably 0.1% to 4% of the total weight of the composition.

The hydrocarbon solvent as used herein is selected from and not limited to C1 to C5 alkyl groups, aliphatic or aromatic hydrocarbons, paraffins or toluene, xylenes and naphthalene derivatives, in particular 1-methyl-naphthalene, 2-methylnaphthalene, mixtures of C6-C16-aromatic compounds, C9-solvent, cyclohexanol, butanol, methyl ethyl ketone, isopropanol. Preferred hydrocarbon solvent used in the composition of the present invention is C9-solvent.

The hydrocarbon solvent is present in the composition in a range of about 0.1% to 45%, more preferably 10% to 40% of the total weight of the composition.

Phenthoate and Cypermethrin may be present in the composition or applied in any amounts relative to each other, to provide the enhanced or synergistic effect of the mixture. Phenthoate and Cypermethrin may be present in the synergistic insecticidal composition in any suitable amount, and is generally present in an amount of from 75% to 5% by weight of the composition, preferably from 55% to 5% by weight of the composition. However, variables of the ratios of each of the active ingredients can be used and the selection of the particular amount is dependent upon many factors including, for example, type of formulations, the crop, disease sought to be controlled and environmental conditions. The selection of the proper quantity of active agent to be applied, however, is within the expertise of one skilled in the art.

The EC composition according to the invention can comprise from 0.5 to 20 wt% of adjuvants commonly used in this field and well known to those expert in the art, such as antidrift agents, adhesives, penetrants, stickers and spreaders.

The EC compositions of the present invention can be diluted with water in the spray tank they form a spontaneous emulsion, with emulsion droplets in the size range of 0.1 to 1.0µm. The spontaneous emulsion can be achieved by selecting one or more surfactants based upon their ability to emulsify the solvent system, including the active ingredient, into water. It is by means of balancing the water soluble and oil soluble surfactant components at the water/solvent interface that a physically stable emulsion is formed. When sprayed, the dilute emulsion gives a uniform and accurate application of active ingredient on the crop at a concentration of at least 0.001 g/l, which is essential for effective pest control.

A particular mode of administering the composition of the present invention is the administration to the aboveground parts of plants, in particular to the leaves thereof (leaf-application). The number of applications and the administered doses are chosen in accordance with the biological and climatic conditions of life of the causative agent. The antifungal compositions though, can also be applied to the soil and get into the plants through the root system (systemic activity), in case the locus of the plants is applied with the components are added to the soil in a solid formulation or sprayed with a liquid composition e.g. in the form of emulsion concentrate (EC).

When using the active compound combinations according to the invention, the application rate can be varied within a relatively wide range, depending on the kind of application. For the treatment of parts of plants, the active-compound combination application rates are generally between 0.1 and 10000 g/ha, preferably between 100 and 2500 g/ha. For seed dressing, the active compound combination application rates are generally between 0.001 and 50 g per kilogram of seed, preferably between 0.01 and 20 g per kilogram of seed. For the treatment of the soil, the active-compound combination application rates are generally between 0.1 and 10000 g/ha preferably between 1 and 5000 g/ha.

The following examples describe the nature of the invention which are given only for the purpose of illustrating the present invention in more detail and are not limitative.
EXAMPLES
Example 1: Composition of Phenthoate 45% and Cypermethrin 6% EC:
Ingredients/Raw Materials Quantity % (w/w)
Phenthoate Technical 49.5
Cypermethrin Technical 7.0
Poly alkyleneoxide modified trisiloxane and polyalkylene oxide (Resicare MSW) 1.0
Mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate (Geronol FF4) 5.0
Mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate (Geronol FF6) 5.0
Soya oil 1.0
C-9 Solvent 31.5

Manufacturing process

All the raw materials were weighed, dispensed and the mixture was mixed in vessel under continuous stirring and all the materials thoroughly mixed for around 30 minutes to obtain homogenous clear solution. The obtained solution was collected and packed.

Field Efficacy trials
Trial 1: Rice trial
Stem Borer: Its damage can reduce the number of reproductive tillers. At late infection, plants develop whiteheads. Yellow stemborer (Scirpophaga incertulas) damage can lead to about 20% yield loss in early planted rice crops, and 80% in late-planted crops. White stemborer is an important pest in rain fed wetland rice.
Leaf folder: Its damage includes leaves fold longitudinally and larvae remains inside, when such folded leaves are opened, larvae can be seen inside. Larvae scrape the green tissues of the leaves, becomes white and dry, during severe infestation the whole field exhibits scorched appearance.

The field trials were conducted to evaluate the efficacy of innovative mixtures of Phenthoate + Cypermethrin EC against stem borer and leaf folder these two important pests of rice. These can affect serious crop stand and yield. Trials were conducted to evaluate the efficacy of innovative mixtures of Phenthoate + Cypermethrin. Trials were conducted with randomized block design with net plot size of 5m x 6m. Rice crop was raised with all standard agronomic practices. Spraying was done with manual operated backpack sprayer with 500 liter of water spray volume per hectare at 15-25 days after transplanting. The observations were recorded before spraying, 10 DAA (Days after application).

Table 1: Pest control in Rice

Compositions
Dose Gram Active/ha
% Insect Control at 10 DAA

Stem borer Leaf folder
Phenthoate 45% + Cypermethrin 6% EC (Example 1) 450+60 90.0 91.5
Phenthoate 50% EC 450 34.5 33.5
Cypermethrin 5% EC 60 39.5 42.5
EC- Emulsifiable Concentrate, DAA Days After Application

The trial result shows excellent efficacy of Phenthoate + Cypermethrin EC combination insecticide against Rice stem borer and Rice leaf folder. The solo application as well as the combination of two active ingredients tested here against stem borer and leaf folder but solo alone was not able to provide satisfactory control of stem borer as well as leaf folder. The synergistic effect had seen in Phenthoate + Cypermethrin combination which has shown excellent efficacy as well as residual control against Stem borer and leaf folder.

Trial 2: Soybean trial
Soybean Glycine max is one of the major oilseed crops of India having first rank in both the area and production. India contributes approximately 51 per cent share to the total area under soybean cultivation in Asia and 10 per cent of the world. This crop will be attacked by number of Insects pests, few very economic important pests we did trials to see results of our product.
Tobacco caterpillar: Spodoptera litura: Larvae feed on the chlorophyll of the leaves. The eaten leaves give the appearance of whitish yellow web. Spodoptera litura (Fabricius) is one of the serious defoliators of soybean. It reduces crop value both quantitatively and qualitatively.
Semilooper: The semilooper feeds on soybean crops and causes yield losses up to 30-40%. It affects the crop at the vegetative stage and if the infestation is at the podding or flowering stage, it can cause considerable yield losses. Usually, the infestation occurs before late August and early September.
Girdle Beetle: The incidence of girdle beetles is observed at the seedling stage. The presence of 2 circular cuts on the branch or stem is a characteristic symptom. Larvae bore into the stem of soybean. The inside of the stem is eaten by the larvae, forming tunnels within the stem. The infected portion above the circular cut is unable to get any nutrition so it dries up. In the later stages of infestation, the plant is severed at about 15 to 25 cm above the ground.
Stem-fly: The adult stem fly is shiny, black, about two millimetres long and looks very similar to the bean fly (Ophiomyia phaseoli), which is a major pest of navy bean seedlings. The damage occurs when the white stem fly larva (maggot) feeds inside the stem.

The field trials were conducted to evaluate the efficacy of innovative mixtures of Phenthoate + Cypermethrin EC against Spodoptera litura, Chrysodeixis includens (Walker) and Girdle beetle and Stem fly these four important pests of Soybean. These can affect serious crop stand and yield loss. Trials were conducted to evaluate the efficacy of innovative mixtures of Phenthoate + Cypermethrin, in randomized block design with net plot size of 5m x 6m. Soybean crop was raised with all standard agronomic practices. Spraying was done with manual operated backpack sprayer with 500 liter of water spray volume per hectare. Pest specific spraying were done as per pest stages. The observations were recorded before spraying, 10 DAA (Days After Application).

Table 2: Pest control in Soybean

Compositions Dose Gram Active/ha % Insect Control at 10 DAA

S. litura C. includens
Phenthoate 45% + Cypermethrin 6% EC 450+60 76.0 73.5
Phenthoate 50% EC 450 28.5 27.0
Cypermethrin 5% EC 60 30.0 29.5
EC- Emulsifiable Concentrate, DAA-Days After Application

The trial result shows excellent efficacy of Phenthoate + Cypermethrin EC combination insecticide against Spodoptera litura and Chrysodeixis includens. The solo application as well as the combination of two active ingredients tested here against Spodoptera litura and Chrysodeixis includens but solo alone was not able to provide satisfactory control of Spodoptera litura as well as Chrysodeixis includens. The synergistic effect had seen in Phenthoate + Cypermethrin EC combination which has shown excellent efficacy as well as residual control against Spodoptera litura and Chrysodeixis includens.

Table 3:

Compositions
Dose Gram Active/ha
% Insect Control at 10 DAA

Stem Fly Girdle beetle
Phenthoate 45% + Cypermethrin 6% EC 450+60 80.0 81.5
Phenthoate 50% EC 450 34.5 33.5
Cypermethrin 5% EC 60 39.5 42.5
EC- Emulsifiable Concentrate, DAA-Days After Application

The trial result shows excellent efficacy of Phenthoate + Cypermethrin EC combination insecticide against Soybean stem fly and girdle beetle. The solo application as well as the combination of two active ingredients tested here against stem fly and girdle beetle but solo alone was not able to provide satisfactory control of stem fly as well as Girdle beetle. The synergistic effect had seen in Phenthoate + Cypermethrin EC combination which has shown excellent efficacy as well as residual control against Stem fly and Girdle beetle.

,CLAIMS:WE CLAIM

1. A synergistic insecticidal composition comprising;
a. an organothiophosphate,
b. a pyrethroid,
c. a silicone wetting agent, and
d. agrochemical auxiliaries.

2. The composition as claimed in claim 1, wherein said organothiophosphate is Phenthoate and said pyrethroid is Cypermethrin.

3. The composition as claimed in claim 1, wherein said composition is in the form of emulsifiable concentrate.

4. The composition as claimed in claims 1 to 3, wherein said emulsifiable concentrate composition comprising combination of Phenthoate, Cypermethrin, silicone wetting agent, surfactants and other agrochemical auxiliaries.

5. The composition as claimed in claims 1 to 3, wherein said emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio of 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, more preferably in the ratio of 1 : 7.5 to 7.5 : 1, silicone wetting agent, surfactants and other agrochemical auxiliaries.

6. The composition as claimed in claim 1, wherein said silicone wetting agent is selected from poly alkylatedoxide modified trisiloxane and poly alkyleneoxide.

7. The composition as claimed in claims 4 and 5, wherein said surfactants are selected form fatty acid esters, fatty alcohols, fatty acid amides or fatty amines with ethylene and/or propylene oxide, alkyl-, alkenyl or polyaryl-substituted phenols with ethylene and/or propylene oxide, fatty esters of polyhydric alcohol esters e.g. sorbitan fatty acid esters, condensation product of such esters with ethylene oxide, e.g. polyoxyethylene sorbitan fatty acid esters, block copolymers of ethylene oxide and propylene oxides, ethoxylated lanolin alcohols or ethoxylated lanolin acids from the group consisting of homo- or copolymers of C2-C3-alkylene oxides, polyoxy-C2-C3-alkylene C8-C22-alkyl ethers, polyoxy-C2-C3-alkylene C1-C16-alkylbenzene ethers, polyoxy- C2-C3-alkylene mono-, di- or tristyryl phenyl ethers, polyoxy-C2-C3-alkylene mono- or distyryl phenyl ether-formaldehyde condensates, and acetylene glycols, mixture or blend of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate.

8. The composition as claimed in claims 4 and 5, wherein said other agrochemical auxiliaries are selected from stabilizers and solvents.

9. An emulsifiable concentrate composition comprising combination of Phenthoate and Cypermethrin at a weight in the ratio 1 : 10 to 10 : 1 of first active ingredient to the second active ingredient, more preferably in the ratio of 1 : 7.5 to 7.5 : 1, poly alkyleneoxide modified trisiloxane and polyalkylene oxide as silicone wetting agent, mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate surfactants, soya oil as stabilizer and C-9 solvent as solvent.

10. The process for the preparation of emulsifiable concentrate composition as claimed in claim 9, wherein said process comprising steps of:
a. adding Phenthoate, Cypermethrin, poly alkyleneoxide modified trisiloxane and polyalkylene oxide, mixture of calcium dodecyl benzene sulphonate, isobutanol and tristyrylphenol ethoxylate, soya oil and C9 solvent in a vessel, and
b. mixing all the ingredients under continuous stirring to obtain homogenous clear solution.

Dated this Twelfth (12th) day of August, 2021

__________________________________
Dr. S. Padmaja
Agent for the Applicant
IN/PA/883