Description:FIELD OF INVENTION
The present invention relates to the technical field of organic weedicides, in particular to an organic weedicide composition and a preparation method thereof.

BACKGROUND
Weed is any plant growing where it is not wanted and does not have any direct benefit to the human being. Weeds are having characteristic of fast growth, difficult to control, toxic to human beings and all his belongings. When weeds grow alongside crops, they compete with the crops for nutrients and ultimately dominate by reducing the output. Because of this, weed control is a big issue for all farmers.
There are different methods employed by the farmers to control the weeds. Some of the major ways to control the weeds are: (a) Mechanical methods, (b) Cultural methods, (c) Chemical methods and (d) Biological methods.
Weed control by the mechanical, cultural and biological is a labour-intensive operation that frequently takes a long time, costs a lot of money, and requires a lot of resources.
Chemical weed control is more significant than manual and mechanical methods. The most popular method for controlling weeds is chemical weed control. However, adverse effects of the chemicals on are notable on the environment, soil and crops cause farmers to consider and accept mechanical methods of weed control.
The use of weedicides to control undesirable plant growth is commonplace, both in domestic horticulture and commercial agriculture. Weedicides are also commonly used to control undesirable plant growth around infrastructure such as public amenities. Whilst being beneficial, if not essential, in modern day horticulture/agriculture and infrastructure maintenance, a major drawback of many weedicides currently used is that they are toxic to humans, animals, and the environment in general.
Glyphosate (N-(phosphonomethyl)glycine) is a widely used broad-spectrum systemic weedicide and plant desiccant. Despite being an effective weedicide, extensive use of it has given rise to glyphosate tolerance in the field. Furthermore, there is mounting evidence to suggest its use is having a deleterious effect on the environment and human health. Consequently, there is now a growing movement across the world to ban the use of glyphosate-based weedicide compositions.
Alternative and more environmentally friendly weedicide compositions are known. For example, compositions comprising fatty acids have been shown to exhibit weedicide activity. After application the active fatty acid component in such compositions has been found to quite quickly decompose into relatively nontoxic residues. As an active weedicide component, fatty acids therefore show promise. However, when used at recommended dosages conventional fatty acid-based weedicide compositions often require a relatively high concentration of fatty acid to promote an acceptable weedicidal activity. For example, application dosages for such conventional compositions are typically at least 30 kg/hectare fatty acid. Conventional fatty acid-based weedicide compositions also often require frequent application to achieve effective plant control. The need for higher active agent concentration and more frequent application can make use of such weedicide compositions economically unattractive. Despite fatty acids being less of an environmental concern (due to being naturally occurring and biodegradable) compared with other weedicide active agents, their use at relatively high concentration to achieve the desired weedicide effect presents at least an economic impediment, if not an environmental concern.
U.S. Pat. No. 6,413,909 suggests a composition comprising ametryn, atrazine and paraquat for burndown treatment. Paraquat, however is rather toxic to mammals and thus its use is restricted by legal regulations.
US 2005/0256004 discloses a herbicidal composition comprising an isoxazoline derivatives and at least one further weedicide.
All these problems kept the foundation to carry out the current invention on the Organic Weedicide/ herbicide preparation. Accordingly, there remains an opportunity to develop weedicide or herbicide compositions with improved efficacy, particularly the compositions, those are organic and can be used effectively at lower dosage rates and yet still prove effective.

SUMMARY
The present invention provides an organic weedicide composition having an acidic pH, the composition being aqueous composition comprising acetic acid, citric acid, sodium chloride, plant oil/s and excipients as emulsifiers and surfactants sticker wherein the requirement of maintaining the acidic pH of the weedicide by adding it in acidic solvent is nonessential.
The present invention also provides a method of preparing a weedicide composition, the method comprising blending the solid and liquid ingredients separately and then mixing the blended solid and liquid ingredients to form uniform mixture formulation.

BRIEF DESCRIPTION OF DRAWINGS
Fig 1 Result of Formulation 1 spraying on weeds
Fig 2 Result of Paraquat spraying on weeds

DETAILED DESCRIPTION
The present invention provides an organic weedicide composition. As used herein, the term “weedicide” is intended to take its conventional meaning and define a composition comprising one or more constituent components capable of killing a weed plant or retarding the weed plant’s growth. Application of the weedicide will generally be employed for killing or retarding the growth of one or more undesirable plant species, for example, one or more weeds. The expression “weedicide activity” therefore refers to the potential or realized function of the composition to act as a weedicide and kill a plant or retard a plant’s growth.
Due to environmental, regulatory action, and increasing consumer concerns, green industry professionals as well as homeowners are seeking alternative weedicide. Organic weedicides are viable alternative to chemical weedicides as they pose less environmental issue and are economical to use.
It is an object of the present invention to provide a weedicide composition, which allows efficient and reliable control of weeds and unwanted herbs. Moreover, the persistence of the weedicide activity of the composition should be sufficiently long in order to achieve control of the weeds over a sufficient long time period thus allowing a more flexible application. The composition should also have a low toxicity to humans or other mammals. The compositions should also show an accelerated action on unwanted plants, i.e. they should affect damaging of the unwanted plants more quickly in comparison with application of the individual weedicides.
These and further objects are achieved by the compositions described hereinafter.
The present invention relates to a weedicide composition comprising: organic acids, plant oils and metal salts as active ingredients and surfactants sticker and emulsifiers as excipients. The composition comprises organic acids that can be phenols (pentachlorophenol), benzoic acid, acetic acid, citric acid, propanoic acid and butanoic acid, one or more metals salts -specifically divalent cationic salts of chloride/ sulphate/ nitrate as anionic moiety, oils from plants such as clove oil (eugenol), thyme oil (thymol, carvacrol), Pongamia oil, mint oil (menthol, pulegone), lemongrass oil (citronellal, citral), neem oil, cinnamon oil (cinnamaldehyde), rosemary oil (1,8-cineole), Peppermint or Lavender or Sandalwood or Bergamot or Chamomile and oil of oregano (carvacrol), surfactant/s sticker and emulsifier/s. Particularly, the composition comprises acetic acid, citric acid, sodium chloride, neem oil, rosemary oil and excipients as emulsifiers and surfactants sticker. More particularly, the composition comprises acetic acid 150 -650 ml/lit, citric acid 40-150 gm/lit, sodium chloride 25-110 gm/lit, neem oil 1-10 ml/lit, rosemary oil 0.5-5 ml/lit, emulsifier 0.1-0.9 ml/lit and surfactant sticker1 -10 ml/lit. Still more particularly, the weedicide composition of the invention comprises acetic acid – 400 ml/lit, citric acid – 100 gm/lit, sodium chloride – 70 gm/lit, Neem Oil (3000 ppm) – 5 ml/lit, emulsifier – 0.5 ml/lit, rosemary oil -02 ml/lit and surfactant sticker – 5 ml/lit with distilled water as solvent.
In one aspect the composition of the weedicide, Formulation 1 comprises Acetic acid, Citric acid, NaCl, Neem Oil, Emulsifier, Rosemary oil and Surfactant. In other aspect, the composition Formulation 2 comprises acetic acid, citric acid, sodium chloride, rosemary oil, emulsifier/s and surfactant/s sticker. Both the formulations have been found to be effective in controlling weeds. Emulsifier/s can be any traditionally used emulsifiers as lecithin, soy lecithin, polysorbate 80, Emulsifier 9.5, emulsifier 4.5 and surfactant/s can be any traditionally used surfactants as fatty alcohol ethoxylate, alkyl phenol ethoxylate and fatty acid alkoxylate.
Both the formulations are tested for their weedicide property and control of weeds. Formulation 1 is found to be more effective than the Formulation 2. The Formulation 1 has also been compared with the commercially available weedicide and has found to give quick results.
The weedicide formulation being organic in its composition does not have any adverse effects on insects or pests. Also, the weedicide Formulation 1 does not show any adverse effect on soil microflora.
Organic Weedicide of the invention can be prepared by using double distilled pre-sterile solvents including methanol or ethanol or Distilled water or any of it or any combination of two or three solvents with variable concentrations ranging from 10 % to 99 %. The ingredients of the composition are dissolved in the solvent.
The invention furthermore relates to the use of a composition as defined herein for controlling undesirable vegetation i.e. for controlling undesirable vegetation in a locus, e.g. a field, where crops are planted, before planting or emergence of the crop. Application can be done before, during and/or after, preferably during and/or after, the emergence of the undesirable vegetation.
The invention also relates to a weedicide formulation, which comprises a weedicide active composition as defined herein and at least one carrier material, including liquid and/or solid carrier materials.
The composition of the present invention shows enhanced weedicide action against undesirable vegetation, in particular against difficult to control species such as Alopecurus myosuroides, Avena fatua, Bromus spec., Echinochloa spec. Ipomea spec., Lolium spec., Phalaris spec., Setaria spec., Digitaria spec., Brachiaria spec., Amaranthus spec., Chenopodium spec., Abutilon theophrasti, Galium aparine, Veronica spec., or Solanum spec. Moreover, the compositions of the invention show a persistent weedicide activity, even under difficult weathering conditions, which allows a more flexible application and minimizes the risk of weeds escaping. The compositions are generally non-toxic or of low toxicity against mammals as the compositions are organic. Apart from that, the compositions of the present invention show superior crop compatibility with certain conventional crop plants and with weedicide tolerant crop plants, i.e. their use in these crops leads to a reduced damage of the crop plants. Thus, the compositions of the invention can also be applied after the emergence of the crop plants provided crop plant are of more height than the weeds to be controlled. The compositions of the present invention may also show an accelerated action on harmful plants, i.e. they may affect damage of the harmful plants more quickly in comparison with solo application of the individual weedicides.
The present invention further provides a weedicide composition produced according to the method of the invention.
The present invention further comprises a method of controlling plant growth at a locus, the method comprising applying to the locus a weedicide composition according to the invention. The present invention also provides use of a weedicide composition according to the invention to kill a plant or retard its growth.
The weedicide compositions in accordance with the invention have been found to exhibit improved weedicide activity relative to conventional weedicide compositions, particularly in terms of the need for lower dosage rates and less frequent application.
The improved weedicide activity of compositions in accordance with the invention is believed to result from the unique combination of the constituent components of the composition. Collectively, all the constituent components of the composition have been surprisingly found to work synergistically and enhance the weedicide efficiency of the weedicide composition.
The type of constituent components in the weedicide composition according to the invention and the lower concentration of those components typically used in practice renders the compositions much more economically and environmentally acceptable.
The weedicide composition in accordance with the invention has an acidic pH; the pH of the composition is less than 7. The pH of the weedicide composition will range from about 1 to about 5, or from about 3 to about 4. 1 to 5
Weedicide compositions in accordance with the invention may be classified as a non-selective weedicide. In that context, the term “non-selective” refers to the spectrum of plant species against which the weedicide is active, with non-selective weedicides being active against most, if not all, plant species.
Common plant species to which the weedicide compositions according to the invention demonstrate weedicide activity include, but are not limited to, annual broadleaf weeds (e.g. Monocots, Dicots, Seasonal and perennial group of weeds i.e. Jungle Rice (Echinochloa colona), Hariyali grass (Cynodon dactylon), Congress Grass (Parthenium hysterophorous), Commelina (Commelina benghalensis), Datura (Datura stamonium), Dandelion, Amaranthus spinosus, Brchiaria reptans, Phyllanthus niruri, Lavhala (Cyprus retundus), Canaray grass little seed (Phalaris minor), & Castor mid-size plant.
Weedicide compositions in accordance with the invention can be liquid-based and can be conveniently applied to a target plant(s) or locus using conventional liquid-based weedicide application means. Such application means include, but are not limited to, spray, pour or rub applications. Weedicide compositions in accordance with the invention will generally be used as a post-emergent (i.e. application directly to a plant/s) weedicide.
The weedicide composition according to the invention will typically be applied to make contact with at least some part of the plant structure situated above the ground. For example, the composition may be applied to the plant foliage and/or stem structure.
The weedicide composition is used in an amount and at a concentration of the constituent components to achieve the desired weedicide activity. The desired weedicide activity may be to kill the plant or simply to retard its growth. If required, the desired weedicide activity may be achieved through single or multiple applications of the weedicide composition to a plant(s) or locus. The broad leaf weeds and dicot weeds can be easily managed in single application, the monocot weeds with small leaves may need more than one application.
As those skilled in the art will appreciate, the amount of and concentration of the constituent components in the weedicide composition to be used in a given application will vary depending on a number of factors such as the plant species and the desired weedicide activity outcome (i.e. to kill the plant or merely retard its growth). Having regard to the teaching herein, those skilled in the art will be able to readily select the amount of and concentration of the constituent components in the weedicide composition to be used in a given application.
The weedicide composition in accordance with the invention can advantageously be provided in a concentrate form that can be used directly or diluted with water depending upon the intended application. For example, the concentrate form of the composition may be used on hard wood plants by pouring it into root areas or application directly onto freshly cut stems, or the concentrate form may be diluted with water for use in spraying on, for example, broad leaf weeds or grasses.
Many of the commercially available weedicides need to be diluted using acid before application. The weedicide composition in accordance with the invention has acidic pH and there is no requirement of using acid during application of the weedicide thus making use of the weedicide economical.
The weedicide composition in accordance with the invention comprises water. In one embodiment, the water is de-mineralised or distilled water. The amount of water present will generally vary from about 0.1 wt% to about 98 wt%. When referred to as a concentrate, the weedicide composition will typically comprises less than about 10 wt%, or less than about 7 wt%, or less than about 5 wt% water, or less than about 2 wt% water.
In another embodiment, the weedicide composition is provided in the form of an emulsion whereby active weedicide agents are located in an oil phase of that emulsion.
The weedicide composition in accordance with the invention can give viable control of very small, young weeds that have only 1-2 leaves (or within 2 weeks of germination) as well as of larger weeds (with >3-4 leaves). The weedicide composition can typically be manufactured in a concentrate form and then diluted before use. The weedicide composition helps in economic management of the unwanted weeds.
The Examples are illustrative and not exhaustive.

EXAMPLE
The organic weedicide Formulation 1 of the invention comprises acetic acid, citric acid, sodium chloride, neem oil, rosemary oil and excipients as emulsifiers and surfactants sticker. Particularly, the composition comprises acetic acid 150 -650 ml/lit, citric acid 40-150 gm/lit, sodium chloride 25-110 gm/lit, neem oil 1-10 ml/lit, rosemary oil 0.5-5 ml/lit, emulsifier (emulsifier 9.5) 0.1-0.9 ml/lit and surfactant sticker (fatty alcohol ethoxylate) 1 -10 ml/lit. More particularly, the composition of the invention comprises acetic acid – 400 ml/lit, citric acid – 100 gm/lit, sodium chloride – 70 gm/lit, Neem Oil (3000 ppm) – 5 ml/lit, emulsifier – 0.5 ml/lit, rosemary oil -02 ml/lit and surfactant sticker – 5 ml/lit with distilled water as solvent.
The weedicide formulation 2 comprises acetic acid – 400 ml/lit, citric acid – 100 gm/lit, sodium chloride – 70 gm/lit, rosemary -02 ml/lit and surfactants sticker – 5 ml/lit in distilled water as solvent.
The solid and liquid ingredients of the formulation are blended together separately and the blends are dissolved in water forming the homogeneous weedicide formulation. Alternatively, each of the ingredients may be added independently into water and mixed to form the formulation.

EXAMPLE
The product efficacy trial for Formulation 1 and 2 was conducted on the weeded area of soyabean plot. The selected weedicide Formulations 1 and 2 were applied on the tagged area. The two Formulations 1 and 2 were used in three different concentrations for testing. The concentrations 5%, 10% & 15% of Formulation 1 and 2 were used for testing the weedicide efficacy. For preparing 5% solution 50ml of concentrate was diluted into (or in) a 1 litre of water; likewise for 10% solution, 100ml of concentrate was diluted in 1 litre and for 15% solution,150ml concentrate was diluted in 1 litre water. Careful mixing was performed to obtain uniformly mixed solution.
Uniform application was carried out on the seasonal and perennial weeds at two leaves stage and on mature weeds of dicots and monocots.
Both the Formulations 1 and 2 were effective and demonstrated good performance for contact destruction of weeds over the targeted area. The results are presented in Table 1 and Table 2. However, Formulation 1 with neem oil was found to demonstrate significant activity – visual dropping down of weeds in shorter time, in comparison to Formulation 2.

Table 1 Field trial of Formulation 1 and 2 for weedicide effect

Sr
No.
Product
Concentration
Targeted Weeds
Results
1

Formulation 1
5%

50ml/Litre Monocots, Dicots, Seasonal and perennial group of weeds i.e.
Jungle Rice (Echinochloa colona), Hariyali grass (Cynodon dactylon), Congress Grass (Parthenium hysterophorous), Commelina (Commelina benghalensis)
Datura (Datura stamonium),
Dandelion, Amaranthus spinosus, Brchiaria reptans, Phyllanthus niruri, Lavhala (Cyprus retundus), Canaray grass little seed (Phalaris minor), & Castor mid-size plant. Weed leaves dropped down within 5 minutes while in case of monocots i.e. hariyali grass showed visual symptoms of wilting in 20-24 24 hrs.

Formulation 2 5%

50ml/Litre Weed leaves dropped down within 15 minutes while in case of monocots i.e. hariyali grass showed visual symptoms of wilting in 20-24 24 hrs.
2

Formulation 1 10%

100ml/Litre Weed leaves dropped down within 5 minutes while in case of monocots i.e. hariyali grass showed visual symptoms of wilting in 20-24 hrs.

Formulation 2 10%

100ml/Litre
Weed leaves dropped down within 15 minutes while in case of monocots i.e. hariyali grass showed visual symptoms of wilting in 20-24 hrs.
3

Formulation 1

15%

150ml/Litre Weed leaves dropped down within less than 5 minutes while in case of monocots i.e. hariyali grass showed visual symptoms of wilting in 18-24 hrs.

Weed leaves dropped down within 7-8 minutes while in case of monocots i.e. hariyali grass showed visual symptoms of wilting in 20-24 hrs.

Formulation 2
15%
150ml/Litre

Table 2 Percentage Weedicide Effect of Formulation 1 and Formulation 2

Sr.
No. Parameters Formulation 1 - 5% Formulation 1 - 10% Formulation 1 - 15% Remarks

1
Weed (contact) mortality With Formulation 1
88%
90%
95% Symptoms noticed within 5 minutes in
dicots, & in 18-24 hrs in monocots.

2
Weed (contact) mortality with Formulation 2
88%
90%
95% Symptoms noticed within 8-15 minutes in
dicots, &20- 24 hrs in monocots.

The Formulation 1 was found to give better weedicide effect than Formulation 2. The weedicide effect of both formulations was found to increase with increase in the concentration.

EXAMPLE
The product efficacy trial for Formulation 1 was conducted on the weeded area of fallow land. The weedicide Formulation 1 and Paraquat Dichloride 24% SL, formulations were applied over the tagged area.
The Formulation 1 was used in 10% concentration. To prepare spraying solution of Formulation 1, 100ml of concentrate of Formulation 1 was uniformly mixed in the one litre of water. Paraquat Dichloride solution was prepared by mixing 10 ml of paraquat dichloride 24% SL, in the one litre of water. The two solutions are used for spraying on tagged area. Uniform spraying application was carried out on the seasonal and perennial weeds; of two leaf stage and on mature weeds of dicots and monocots plants. Results are shown in Table 3. The results of foliar application demonstrate the Formulation 1 as a Non-selective contact weedicide for Monocots and Dicots weeds.
Area treated with Formulation 1 weedicide showed quick results. Over the treated area, weed leaves were spotted dropping down in five minutes after foliar application; but in case of monocots i.e. hariyali grass takes up to 20-24 hrs. for visual symptoms of spot wilting. The spot wilting results were visible early in dicots and delayed in monocots.

Area sprayed with Paraquat Dichloride 24% SL formulation, also found to give response in respect of visual results on the targeted area, on the weeds like monocots and dicots. In Case of Monocots & Dicots it had taken 20 minutes to show visual results in respect of drooping down the leaves in whole plant foliage.

Table 3 Weedicide Effect of Formulation 1 and paraquat dichloride
Sr No. Product Concentration Targeted Weeds in each treatment Results

1

Formulation 1

100 ml per litre of water Monocots, Dicots, Seasonal and perennial group of weeds i.e.
Jungle Rice (Echinochloa colona), Hariyali grass (Cynodon dactylon), Congress Grass (Parthenium hysterophorous), Commelina (Commelina benghalensis) Datura (Datura stamonium), Dandelion,
Amaranthus spinosus, Brchiaria reptans,
Phyllanthus niruri, Lavhala (Cyprus retundus), Canaray grass little seed (Phalaris minor), & Castor mid size plant Weed leaves of dicots dropped down within five minutes after foliar application; but in case of monocots i.e hariyali grass visual wilting effect starts appearing in 15-25 minutes and spot wilting was observed in 20-24 hrs. The spot wilting results were visible early in dicots and delayed in monocots.

2

Paraquat Dichloride 24% SL
Formulation

10 ml per litre of water In Case of Dicots, it took 20 minutes to show visual results in respect of drooping down the leaves in whole plant foliage and in case of monocots visual results start appearing approx. at 20 mins and wilting took further time.

EXAMPLE
The effect of application of weedicide Formulation 1 on insects was evaluated. The insects (Mealy bugs and Lepidoptera Caterpillars) were topically exposed to Formulation 1 and the effect of the exposure of Formulation 1 on insects was analysed. Results of application of Formulation 1 on insects are shown in Table 5. At all three concentrations tested viz. 5%, 10% and 15% of Formulation 1, no mortality of insects was observed.

Table 5: Effect of Weedicide against Insect Pests

Sr. No. Treatment Details Mortality %
Mealybugs Caterpillar
1 Control (Water) Nil Nil
2 Formulation 1 - 5 % Nil Nil
3 Formulation 1 - 10% Nil Nil
4 Formulation 1 - 15% Nil Nil

EXAMPLE
The Formulation 1 was tested for its effect on the soil microflora. The Formulation 1 was applied on the soil and the soil was tested for any effect on the microflora at interval of 6th day and 15th day. The Results are as shown in Table 6. It was observed that application of organic weedicide of Formulation 1 on soil microflora does not cause any harmful effect.

Table 6 Effect of Weedicide on Soil Microflora

Sample Initial Soil microflora
w/o weedicide spray Weedicide concentrations Soil Microflora on 6th day of spraying

cfu/ml Soil microflora on 15th day of spraying

cfu/ml
Formulation 1 - 5 % 1.14x106 5% 1.73x105 1.84 x105
Formulation 1 - 10% 5.10x105 10% 2.12x105 2.02 x105
Formulation 1 - 15% 5.95x105 15% 2.98x105 1.68 x105
Sample 4 no treatment NA Control 2.65x105 1.47 x105

We Claim

1] An organic weedicide composition for controlling weeds comprising acetic acid, citric acid, sodium chloride, neem oil, rosemary oil and excipients dissolved in solvent.

2] The composition as claimed in claim 1 wherein excipients are emulsifier and surfactants sticker

3] The composition as claimed in claim 2 wherein acetic acid is 150 -650 ml/lit, citric acid is 40-150 gm/lit, sodium chloride is 25-110 gm/lit, neem oil is 1-10 ml/lit, rosemary oil is 0.5-5 ml/lit, emulsifier is 0.1-0.9 ml/lit and surfactant sticker is 1 -10 ml/lit.

4] The composition as claimed in claim 3 wherein acetic acid is 400 ml/lit, citric acid is 100 gm/lit, sodium chloride is 70 gm/lit, Neem Oil (3000 ppm) is 5 ml/lit, emulsifier is 0.5 ml/lit, rosemary oil is 02 ml/lit and surfactant sticker is 5 ml/lit with distilled water as solvent.

5] The composition as claimed in claim 4 wherein emulsifiers are a
ny one of lecithin, soy lecithin, polysorbate 80, Emulsifier 9.5, emulsifier 4.5
6] The composition as claimed in claim 4 wherein surfactant sticker are fatty alcohol ethoxylate, alkyl phenol ethoxylate and fatty acid alkoxylate.

7] A method of preparation of weedicide composition of claim 1 wherein a] solid ingredients as citric acid and sodium chloride are blended, b] liquid ingredients as acetic acid, neem oil, rosemary oil, emulsifier and surfactant sticker are blended and c] blends of step a] and step b] are added in water and dissolved to form homogeneous solution.
, Claims:1] An organic weedicide composition for controlling weeds comprising acetic acid, citric acid, sodium chloride, neem oil, rosemary oil and excipients dissolved in solvent.

2] The composition as claimed in claim 1 wherein excipients are emulsifier and surfactants sticker

3] The composition as claimed in claim 2 wherein acetic acid is 150 -650 ml/lit, citric acid is 40-150 gm/lit, sodium chloride is 25-110 gm/lit, neem oil is 1-10 ml/lit, rosemary oil is 0.5-5 ml/lit, emulsifier is 0.1-0.9 ml/lit and surfactant sticker is 1 -10 ml/lit.

4] The composition as claimed in claim 3 wherein acetic acid is 400 ml/lit, citric acid is 100 gm/lit, sodium chloride is 70 gm/lit, Neem Oil (3000 ppm) is 5 ml/lit, emulsifier is 0.5 ml/lit, rosemary oil is 02 ml/lit and surfactant sticker is 5 ml/lit with distilled water as solvent.

5] The composition as claimed in claim 4 wherein emulsifiers are a
ny one of lecithin, soy lecithin, polysorbate 80, Emulsifier 9.5, emulsifier 4.5
6] The composition as claimed in claim 4 wherein surfactant sticker are fatty alcohol ethoxylate, alkyl phenol ethoxylate and fatty acid alkoxylate.

7] A method of preparation of weedicide composition of claim 1 wherein a] solid ingredients as citric acid and sodium chloride are blended, b] liquid ingredients as acetic acid, neem oil, rosemary oil, emulsifier and surfactant sticker are blended and c] blends of step a] and step b] are added in water and dissolved to form homogeneous solution.