Field of the Invention
[0001] The present disclosure, in general relates to herbicidal formulation for crop. More particularly, the present invention provides an improved synergistic formulation comprising Pretilachlor and Oxadiargyl and methods for manufacturing the same.

Background of the Invention
[0002] Background description includes information that may be useful in understanding the present disclosure. It is not an admission that any of the information provided herein is prior art or relevant to the present disclosure, or that any publication specifically or implicitly referenced is prior art.

[0003] Weeds are becoming a challenge for growth of many crops in tropical agriculture and the efficacy of available means to control them is not sufficient. To control the weeds, currently we are largely focused on agronomic practices, the use of resistant/tolerant cultivars and the use of herbicides, although success has been not very satisfactory. Therefore, there is urgent need to devise an innovative technique to resolve such issues.

[0004] There are various approaches have been taken to resolve such challenges. Various formulation and method have been developed by employing specific herbicides or combining two or more herbicides and using such formulation for pesticide and weed control.

[0005] WO2015059580A1 titled Controlled release formulations of herbicides granular formulations of herbicides that provide a means to apply non-selective herbicides to field, paddy crops and turf. Granules can be formulated with sub-particles to allow differential release of one or other active ingredient. Granules or sub-particles allow for controlled release of active ingredient such that while up to 30% of the active ingredient is available within 24h, the remainder requires 3 to 40 days to become available. Sub-particles may also be used as conventional sprays to reduce uptake by leaves of desirable crops.

[0006] CN106508903A titled Herbicide used for paddy rice and application and preparation method thereof discloses herbicide formulation comprises a weeding active component, a solvent, an emulsifier and a filling material; the emulsifier is calcium dodecyl benzene sulphonate and/or tristyrylphenol polyoxyethylene ether; and the filling material is one or more selected from tristyrylphenol polyoxyethylene ether, polyvinyl alcohol, gum or polyethylene glycol. The herbicide is a wax, and is a novel dosage form, and can be directly used in the paddy rice while in use, emulsification, diffusion and uniform distribution of the herbicide in paddy rice, so that weeding effect is achieved. The herbicide has the advantages of convenient usage, labor saving and time saving. Compared with the other dosage form, the herbicide can obviously increase the weeding effectiveness of the active component, and can be used for preventing and treating annual gramineous weeds and broadleaf weeds in paddy field.

[0007] IN353841A1 titled Novel synergistic herbicide composition of pendimethalin and pyrazosulfuron discloses a novel herbicide composition comprising Pendimethalin, Pyrazosulfuron-ethyl and Zinc. The present invention also relates to process for preparing the said composition comprising of synergistic bioactive amounts of Pendimethalin and Pyrazosulfuron-ethyl along with one or more inactive excipients. The present invention also relates to process for preparing the said composition comprising of synergistic bioactive amounts of Pendimethalin, Pyrazosulfuron -ethyl and Zinc along with one or more inactive excipients.

[0008] However, such formulation is not that much effective to handle all the harmful effects of weed on the crop plants and still alternative approach has to be worked upon to develop a synergistic herbicidal composition having more effective and broader spread ability.

[0009] Considering the existing challenges according to the current methods, there is need to devise and evaluate the efficacy of suitable herbicides and develop a composition for effective control of broad range of unwanted weeds control.

Summary of the Invention
[0010] This summary is provided to introduce concepts related to synergetic herbicidal formulations and the concepts are further described below in the detailed description. This summary is neither intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.

[0011] It is a primary objective of the present invention to provide a synergetic herbicidal formulation which enable active ingredients to distribute homogeneously on field surface & penetration into soil which restrict weeds emergence accordingly product effectiveness increases.

[0012] It is another objective of the present invention to provide a synergetic herbicidal formulation which enable ease of application for farmer during broadcasting process.

[0013] It is another objective of the present invention to provide a synergetic herbicidal formulation which is capable of increasing the soil fertility.

[0014] It is another objective of the present invention to provide a synergetic herbicidal formulation employing non-ionic biodegradable adjuvant which is more environmental friendly and cost effective.

[0015] The above and other objectives of the present invention are achieved according to the following embodiments of the present invention. However, the disclosed embodiments are exemplary based on the preferred and best mode of the invention and not limit the scope of the present invention.

[0016] In accordance with one embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising Emulsion-in-water (EW) phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water and Suspension concentrate (SC) phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer, wherein said formulation results in suspoemulsion formulated into stable granules with better soil penetration.

[0017] In accordance with another embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising EW phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water and SC phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer, wherein said formulation is resulted in suspoemulsion formulated into stable homogenous granules with better soil penetration and wherein nonionic surfactant is 0.01 % to 25 % of Poly (oxy-1,2-ethanediyl). alpha. -(2-propylheptyl)-. omega. – hydroxyl & equivalent adjuvant comprising wetting property.

[0018] In accordance with one other embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising EW phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water and SC phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer, wherein said formulation is resulted in suspoemulsion formulated into stable granules with better soil penetration and wherein the naphtha solvent used herein is 0.00 to 20 % of Petroleum naphtha solvent.

[0019] In accordance with another embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising EW phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water and SC phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer, wherein said formulation is resulted in suspoemulsion formulated into stable granules with better soil penetration and wherein the silicone defoamer used herein is in an amount of 0.01 to 10 % by wt.

[0020] In accordance with another embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising EW phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water and SC phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer, wherein said formulation is resulted in suspoemulsion formulated into stable granules with better soil penetration and wherein the biocide used herein is in amount of 0.001 to 2 % by wt.

[0021] In accordance with yet other embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase, wherein the formulation comprising a blend of emulsifier to develop the formulation. The emulsifier used herein preferably Calcium salt of alkyl benzene sulphonic acid & poly oxyethylene condensate of saturated triglycerides in butanol/ proprietary acrylic graft copolymer or equivalent.

[0022] In accordance with one other embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase, wherein the formulation comprising a blend of dispensing agents while developing the formulation. The dispensing agents used herein preferably fatty alcohol ethoxylate, poly oxyethylenated triglycerides & alcohol ethoxylate/blend polymeric non-ionic surfactants or equivalent.

[0023] In accordance with one other embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising EW phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water and SC phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer, wherein said formulation is resulted in suspoemulsion formulated into stable granules with better soil penetration and wherein the particle size of suspension phase/ suspo-emulsion phase in the range of 0.1 micron to 200 micron.

[0024] In accordance with another embodiment of the present invention, there is provided a method for preparing granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising developing EW phase by blending oil phase of herbicide Pretilachlor with water phase by stirring along with Xantham gum, wherein oil phase is prepared comprising 60 % of Pretilachlor with 0.01 to 25 % of non-ionic surfactant in presence of naphtha solvent until a clear solution is achieved; and water phase is prepared by mixing 60 % of Pretilachlor in water along with silicon defoamer and biocide, developing SC of Oxadiargyl by wet milling the surfactants along with silicon defoamer, blending resultant EW phase of Pretilachlor and SC phase of Oxadiargyl under continuous stirring to get a homogeneous stable suspoemulsion phase by adding rheology modifier and adding black bentonite in the resultant and granulating to get free-flowing granules.

[0025] These and other objectives, embodiments of the subject matter will become more fully apparent when the following detailed description is read with the accompanying experimental details. However, both the foregoing summary of the subject matter and the following detailed description of it represent one potential objective or embodiment and are not restrictive of the present disclosure or other alternate objectives or embodiments of the subject matter.

Detailed Description of the Invention
[0026] The following is a detailed description of implementations of the present disclosure depicted in the accompanying experiments. The implementations and embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the implementations and embodiments but it is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure. While aspects of described a synergistic herbicidal formulation and method thereof are described further in the context of the following experimental details.

[0027] Various terms as used herein in the invention is not defined and it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.

[0028] In the description herein, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.

[0029] In accordance with embodiments of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising EW phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water and SC phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer, wherein said formulation is resulted in suspoemulsion formulated into stable granules with better soil penetration.

[0030] The method of preparing a granular formulation of herbicides according to present invention having homogenous blend of oil phase and aqueous phase comprising developing EW phase by blending oil phase of herbicide Pretilachlor with water phase by stirring along with Xantham gum, wherein oil phase is prepared comprising 60 % of Pretilachlor with 0.01 to 25 % of non-ionic surfactant in presence of naphtha solvent until a clear solution is achieved; and water phase is prepared by mixing 60 % of Pretilachlor in water along with silicon defoamer and biocide, developing SC of Oxadiargyl by wet milling with surfactants along with silicon defoamer, blending resultant EW phase of Pretilachlor and SC phase of Oxadiargyl under continuous stirring to get a homogeneous stable suspoemulsion phase by adding rheology modifier and adding black bentonite in the resultant and granulating to get free-flowing granules.

[0031] The nonionic surfactant used herein in the formulation and method is 0.01 % to 25 % of Poly (oxy-1,2-ethanediyl) alpha. -(2-propylheptyl)- omega. – hydroxyl & equivalent adjuvant comprising wetting property.

[0032] The solvent used herein in the formulation and method is the naphtha solvent of about 0.00 to 20 % of Petroleum naphtha solvent.

[0033] The silicone defoamer used herein is in an amount of 0.01 to 10 % by wt, wherein the biocide used herein is in amount of 0.001 to 2 % by wt.

[0034] In accordance with one embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase, wherein the formulation comprising a blend of emulsifier to develop the formulation. The emulsifier used herein preferably Calcium salt of alkyl benzene sulphonic acid & poly oxyethylene condensate of saturated triglycerides in butanol/ proprietary acrylic graft copolymer or equivalent, wherein resultant formulation herein enable in reduction of surface tension on contact with water.

[0035] In accordance with one embodiment of the present invention, there is provided a granular formulation of herbicides having homogenous blend of oil phase and aqueous phase, wherein the formulation comprising a blend of dispensing agents while developing the formulation. The dispensing agents used herein preferably fatty alcohol ethoxylate, poly oxyethylenated triglycerides & alcohol ethoxylate/blend polymeric non-ionic surfactants or equivalent, wherein the resultant formulation achieves stable granules with better soil penetration.

[0036] The formulation and method thereof according to the present invention achieve a particle size of suspension phase/ suspo emulsion phase in the range of 0.1 micron to 200 micron.

[0037] According the present invention formulation disclosed herein can be formulated in Granular Form (GR), Suspoemulsion (SE), Emulsifiable Concentrate (EC), Wettable Powder (WP) & Water-dispersible Granules (WG) are also possible formulations.

[0038] Below are the various examples for preparing different compounds according to the present invention. However, the below examples are not limited and will be further worked on within the scope of the current invention and filed:

Experiment 1

Pretilachlor 6.0 % + Oxadiargyl 1.0 % GR BY ACTIVE IN SUSPOEMULSION PROCESS

S. No. INGREDIENTS QUANTAITY

1 Pretilachlor Technical Active content 0.1 to 60 %
2 Oxadiargyl Active content 0.1 to 20 %
3 Poly (oxy-1,2-ethanediyl). alpha. -(2-propylheptyl)-. omega. - hydroxy or an equivalent nonionic surfactant 0.01 % to 25 %
4 Blend of Calcium salt of alkyl benzene sulphonic acid & poly oxyethylene condensate of saturated triglycerides in butanol/ proprietary arylic graft copolymer or equivalent 0.01 to 10 %
5 Blend of fatty alcohol ethoxylate, poly oxyethylenated triglycerides & alcohol ethoxylate/blend polymeric non-ionic surfactants or equivalent 0.01 to 25 %
6 Petroleum naphtha solvent 0.00 to 20 %
7 Silicone defoamer 0.01 to 10 %
8 Xantham gum or equivalent polysaccharides as a thickener 0.001 to 0.5 %
9 Biocide 0.001 to 2 %
10 Bentonite black granules Q S
11 Diatomaceous earth 0.1 to 5 %

Manufacturing steps: -
OIL Phase:
Weigh required qty of Pretilachlor technical & defined surfactants qty in presence of naphtha solvent stir well at room temperature to get a clear solution.

Aqueous Phase:
Weigh in a beaker water, silicon defoamer, biocide and mix well.

1. EW Phase:
Mix Oil Phase into Aqueous phase slowly under high-speed stirring at least for 30 min on selected RPM add Xantham gum & stir well to get stable Pretilachlor EW.

2. Preparation of Oxadiargyl SC:
Weigh water qty and add selected surfactants along with silicon defoamer, homogenize and carry out wet milling till get a particle size < 10 micron or at selected defined particle size in the range of 0.1 micron to 100 micron.

3. Preparation of SE Phase:
Now combine both EW & SC phase under continuous stirring. as per requirement homogenization can also be done to get a homogeneous suspoemulsion phase, finally added rheology modifier for stable suspemulsion the final particle size of SE may be 0.1 micron to 100 micron.

4. Preparation of Stable Granules formulation:
Weigh the require qty of black bentonite granules into a revolving mixer blender & spray the specified qty of suspoemulsion phase & keep revolving the mixer till fine granules are produced. Finally diatomaceous powder can be added & mix to get a free-flowing granules.

Experiment 2

Pretilachlor 6.0 % + Oxadiargyl 1.0 % GR formulation by Active IN WP process
S. No. INGREDIENTS QUANTAITY

1 Pretilachlor Technical Active content 0.1 to 50 %
2 Oxadiargyl Active content 0.1 to 20 %
3 Wetting & dispersing agent, Non-ionic wetting agent 2 to 25 %
4 China Clay 1 to 30 %
5 Mono ethylene glycols 1 to 5 %
6 Bentonite granules QS

Manufacturing steps: -
1. Weigh the specified quantity of Oxadiargyl technical into mixing blender & start mixing now add wetting agent & dispersing agent keep the mixing on add China clay & continue mixing.

2. Now grind the dry mass through ACM or jet mill to find micronized powder.

3. Now charge the bentonite blank granules into revolving mixer and add mono ethyl glycol to keep the granules wet & mix properly.

4. Keep the mixing on and add Pretilachlor Technical & Oxadiargyl micronized powder & keep mixing on till free-flowing final granules are produced.

Experiment 3

Pretilachlor + Oxadiargyl EC formulation
S. No. INGREDIENTS QUANTAITY

1 Pretilachlor Technical Active content 0.1 to 50 %
2 Oxadiargyl Active content 0.1 to 20 %
3 Co-Solvent 2 to 25 %
4 Solvent Naphtha QS
5 Emulsifiers 1 to 5 %

An EC formulation prepared of Pretilachlor & Oxadiargyl combination by dissolving Oxadiargyl technical in a selected co- Solvent either polar or non-polar in nature, while keep stirring the mass add Pretilachlor technical, suitable emulsifiers & make up with solvent naphtha. Mix the whole mass properly to get an emulsifiable concentrate formulation.

Experiment 4

Pretilachlor + Oxadiargyl SE formulation
S. No. INGREDIENTS QUANTAITY

1 Pretilachlor Technical Active content 0.1 to 60 %
2 Oxadiargyl Active content 0.1 to 20 %
3 Poly (oxy-1,2-ethanediyl). alpha. -(2-propylheptyl)-. omega. - hydroxy a nonionic surfactant 0.01 % to 25 %
4 Blend of Calcium salt of alkyl benzene sulphonic acid & poly oxyethylene condensate of saturated triglycerides in butanol/ proprietary arylic graft copolymer. 0.01 to 10 %
5 Blend of fatty alcohol ethoxylate, poly oxyethylenated triglycerides & alcohol ethoxylate/blend polymeric non-ionic surfactants. 0.01 to 25 %
6 Petroleum naphtha solvent 0.00 to 20 %
7 Silicone defoamer 0.01 to 10 %
8 Xantham gum or equivalent polysaccharides as a thickener 0.001 to 0.5 %
9 Biocide 0.001 to 2 %
10 Water QS

Manufacturing process:
OIL Phase:
Weigh required qty of Pretilachlor technical & defined surfactants qty in presence of naphtha solvent stir well at room temperature to get a clear solution.

Aqueous Phase:
Weigh in a beaker water, silicon defoamer, biocide and mix well.

1. EW Phase:
Mix Oil Phase into Aqueous phase slowly under high-speed stirring at least for 30 min on selected RPM add Xantham gum & stir well to get stable Pretilachlor EW.

2. Preparation of Oxadiargyl SC:
Weigh water qty and add selected surfactants along with silicon defoamer, homogenize and carry out wet milling till the particle size is < 10 micron or at selected defined particle size in the range of 0.1 micron to 100 micron.

3. Preparation of SE Phase:
Now combine both EW & SC phase under continuous stirring. as per requirement homogenization can also be done to get a homogeneous suspoemulsion phase, finally added rheology modifier for
stable suspemulsion the final particle size of SE may be 1 micron to 100 micron

Experiment 5

Pretilachlor 6.0 % + Oxadiargyl 1.0 % GR
S. No. INGREDIENTS QUANTAITY
1. Pretilachlor Technical Active content 6.0 %
2. Oxadiargyl Active content 1.0 %
3. Poly(oxy-1,2-ethanediyl), alpha.-(2-propylheptyl)- omega- hydroxy 1.0 %
4. Blend of calcium salt of dodecyl benzene sulphonate & polyethanoxy ether derivatives in organic solvent. 1.0 %
5. Poly(1-vinyl-2-pyrrolidinone) 0.2 %
6. Polar Co-Solvent 5.0 %
7. Bentonite black granules Q S
8. Diatomaceous earth 0.5 %

Manufacturing steps:
Spray solution: -

Dissolve Oxadiargyl Technical into selected polar solvent till a clear transparent solution is produced & add PVK-30. Under stir add Poly(oxy-1,2-ethanediyl), .alpha.-(2-propylheptyl)-. omega.- hydroxy , blend of calcium salt of dodecyl benzene sulphonate & polyethanoxy ether derivatives in organic solvent. Stir the mass properly & finally add Pretilachlor tech & mix.

Steps to make Final GR formulation:
1. Charge black bentonite granules into the PAN revolving mixture and start.
2. Now spray the above made solution onto the bentonite black granules and revolve the revolving mixture for at least 20 min.
3. Finally add high flow powder to make granules dry & free flowing.
4. Draw sample for quality analysis.

Experiment 6

Effect of addition of surfactant to premix granular formulation of Oxadiargyl and Pretilachlor on weed control in transplanted system of paddy Cultivation – (25 Days after Application (pooled data from 3 locations))

Methodology:
The study was conducted on the farmer field at three different locations viz Kalna, West Bengal, Davanagere Karnataka and Warangal, Telangana during the month of February to determine the bio-efficacy of pre-emergence herbicides on the weeds of paddy. The experiment was laid down in RBD with three replications and 10 treatments including control plot. One-month old rice seedlings were transplanted in the main field on February with two seedlings hill-1 at a spacing of 20cm x 20cm. Herbicide was applied in the crop field at 3 DAT. Water level of 4-6cm was maintained during herbicide application. After application the weed count was taken 15 and 25 DAA. The observation of weed population was taken from 1 m2 area.

Observation on Weed Count per m2:
A quadrat with the dimension of 1 X 1 sqm was placed randomly at 5 places in each plot and the weeds from that area were counted and expressed a number per sq meter. Weed count of individual weed species was recorded and statistically analysed at 95% confidence Limit. Data is also converted to percent weed control and overall Mean percent control was calculated.

Results:
At 25 Days after application, all the treatments recorded statistically different population of individual weed species as compared to control. However, statistically superior efficacy was reported with Pretilachlor and Oxadiargyl granular pre-mix with added surfactant as compared to pre-mix granular formulation without surfactant.

While the invention is amenable to various modifications and alternative forms, some embodiments have been illustrated by way of example in the experiments and are described in detail above. The intention, however, is not to limit the invention by those examples and the invention is intended to cover all modifications, equivalents, and alternatives to the embodiments described in this specification.

The embodiments in the specification are described in a progressive manner and focus of description in each embodiment is the difference from other embodiments. For same or similar parts of each embodiment, reference may be made to each other.

It will be appreciated by those skilled in the art that the above description was in respect of preferred embodiments and that various alterations and modifications are possible within the broad scope of the appended claims without departing from the spirit of the invention with the necessary modifications.

Based on the description of disclosed embodiments, persons skilled in the art can implement or apply the present disclosure. Various modifications of the embodiments are apparent to persons skilled in the art, and general principles defined in the specification can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments in the specification but intends to cover the most extensive scope consistent with the principle and the novel features disclosed in the specification.

We Claim:

1. A granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising:
EW phase consists of homogenously blended oil and water phase comprising 0.1 to 60 % of Pretilachlor Active content, non-ionic surfactant, a solvent, silicon defoamer, biocide and water; and
SC phase consists of homogenously blended 0.1 to 60 % of Oxadiargyl Active content, non- surfactants, silicon defoamer,
wherein said formulation is resulted in suspoemulsion formulated into stable granules with better soil penetration.

2. The formulation as claimed in claim 1, wherein nonionic surfactant is 0.01 % to 25 % of Poly (oxy-1,2-ethanediyl). alpha. -(2-propylheptyl)-. omega. – hydroxyl & equivalent adjuvant comprising wetting property.

3. The formulation as claimed in claim 1, wherein the naphtha solvent used herein is 0.00 to 20 % of Petroleum naphtha solvent.

4. The formulation as claimed in claim 1, wherein the silicone defoamer used herein is in an amount of 0.01 to 10 % by wt.

5. The formulation as claimed in claim 1, wherein the biocide used herein is in amount of 0.001 to 2 % by wt.

6. The formulation as claimed in claim 1, wherein the formulation comprising a blend of emulsifier, preferably Calcium salt of alkyl benzene sulphonic acid & poly oxyethylene condensate of saturated triglycerides in butanol/ proprietary acrylic graft copolymer or equivalent.

7. The formulation as claimed in claim 1, wherein the formulation comprising a blend of dispensing agents preferably fatty alcohol ethoxylate, poly oxyethylenated triglycerides & alcohol ethoxylate/blend polymeric non-ionic surfactants or equivalent.

8. The formulation as claimed in claim 1, wherein the particle size of suspension phase/ suspo emulsion phase in the range of 0.1 micron to 200 micron.

9. A method for preparing granular formulation of herbicides having homogenous blend of oil phase and aqueous phase comprising:
developing EW phase by blending oil phase of herbicide Pretilachlor with water phase by stirring along with Xantham gum,
wherein oil phase is prepared comprising 60 % of Pretilachlor with 0.01 to 25 % of non-ionic surfactant in presence of naphtha solvent until a clear solution is achived; and water phase is prepared by mixing 60 % of Pretilachlor in water along with silicon defoamer and biocide;
developing SC of Oxadiargyl by wet milling with the surfactants along with silicon defoamer;
blending resultant EW phase of Pretilachlor and SC phase of Oxadiargyl under continuous stirring to get a homogeneous stable suspoemulsion phase by adding rheology modifier;
adding black bentonite in the resultant and granulating to get free-flowing granules.

10. The method as claimed in claim 9, wherein nonionic surfactant is 0.01 % to 25 % of Poly (oxy-1,2-ethanediyl). alpha. -(2-propylheptyl)- omega. – hydroxyl & equivalent adjuvant comprising wetting property.

11. The method as claimed in claim 9, wherein the naphtha solvent used herein is 0.00 to 20 % of Petroleum naphtha solvent.

12. The method as claimed in claim 9, wherein the silicone defoamer used herein is in an amount of 0.01 to 10 % by wt.

13. The method as claimed in claim 9, wherein the biocide used herein is in amount of 0.001 to 2 % by wt.

14. The method as claimed in claim 9, wherein the formulation comprising a blend of emulsifier, preferably Calcium salt of alkyl benzene sulphonic acid & poly oxyethylene condensate of saturated triglycerides in butanol/ proprietary acrylic graft copolymer or equivalent.

15. The method as claimed in claim 9, wherein the formulation comprising a blend of dispensing agents preferably fatty alcohol ethoxylate, poly oxyethylenated triglycerides & alcohol ethoxylate/blend polymeric non-ionic surfactants or equivalent.

16. The method as claimed in claim 9, wherein the particle size of suspension phase/ suspo emulsion phase in the range of 0.1 micron to 200 micron.