CLIAMS:1.A synergistic fungicidal composition comprising a combination of :-

a. polymeric zinc propylenebis (dithiocarbamate), and
b. 5-methyl-1,2,4-triazolo[3,4-b][1,3] benzothiazole

2.The composition as claimed in claim 1 wherein the weight ratio of polymeric zinc propylenebis (dithiocarbamate) and 5-methyl-1,2,4-triazolo[3,4-b][1,3] benzothiazole are in the ratio from 20 : 1 to 1 : 6

3.The composition as claimed in claim 1 wherein the molar ratio of polymeric zinc propylenebis (dithiocarbamate) and 5-methyl-1,2,4-triazolo[3,4-b][1,3] benzothiazole are in the ratio of 4.2: 2
4.The composition as claimed in claim 1 wherein the composition further also including atleast one stabilizing agent.

5.The composition as claimed in claim 4 wherein the stabilizing agent having a mass of range from 0.5 to 4% of total mass of the composition.

6.The composition as claimed in claim 4 wherein the stabilizing agent may be Chelatin complex.

7.The composition as claimed in claim 6 wherein the Chelatin complex having a mass of 0.1 to 5% of total mass of the composition.

8.The composition as claimed in claim 1 including atleast one suspending agent.

9.The composition as claimed in claim 8 wherein the suspending agent having a mass of 0.5 to 8% of the total mass of the composition.

10.The composition as claimed in claim 1 including atleast one filler.

11.The composition as claimed in claim 10 the filler agent having a mass of 1 to 40% of the mass of the composition.

12.The composition as claimed in claim 1 to 11, wherein the composition is wettable powder with wetting agent in the range 0.5 to 5% .

13.The composition as claimed in claim 1 to 11, wherein the composition is water dispersible granules including dispersing agent in the range 0.1 to 5%.

14.The composition as claimed in claim 1 to 11, wherein the composition may be diluted to form an aqueous dilution of the composition according to any of claims 1 to 13 for the purpose of application to the crop plants
,TagSPECI:FIELD OF INVENTION:

The following specification describes the invention and discloses a synergistic fungicidal combination comprising polymeric zinc propylenebis(dithiocarbamate) and 5-methyl-1,2,4-triazolo[3,4-b][1,3]benzothiazole which are at weight ratio of 20:1-1:6 molar ratio of first active ingredient to the second active ingredient, more preferably in the ratio of 4.2:2. The synergistic effect of the pesticide combination can be prepared to water dispersible granules and wettable powder. Compared with the existing single preparation, the combination not only has obvious fungicidal effect but also has excellent synergistic effect & reduces the development of resistance, has less amount of residue and causes less contamination to the crops, so the combination is safe & environment friendly. The active compound combinations according to the invention have very good fungicidal properties and can be employed for controlling phytopathogenic fungi, such as Plasmodiophoromycetes, Oomycetes, Chytridiomycetes, Zygomycetes, Ascomycetes, Basidiomycetes Deuteromycetes, etc, which causes the disease in field and green house crops like cereals, pulses, oilseeds, vegetables, fruits, spices and ornamental crops. The composition of the present invention could be applied to plants, seeds, fruits, soil as preventive and curative state

BACKGROUND OF THE INVENTION:

In recent times the trend of growing resistance to all kinds of fungicides, control of multiple disease on same host, formation of residues are great concern and utmost challenge to the scientist community as a whole. With rapid urbanization there is a constant erosion of farming land and at the same time increasing population has created a growing demand of farm products resulted increasing trend of intensive cultivations of crops which favours numerous disease attack on crop plant.

The diversity of phytopathogenic organisms and their potential for causing serious disorders in combination or singly has resulted in the need for broad-spectrum disease control. There are numerous chemical compounds (fungicides), which aid in preventing diseases of plants, however most of them have practical deficiencies, which restricts their application. The inability of any one fungicide to control all of the potentially serious fungal disease on one-host makes the use of combinations or mixtures of fungicides a part of normal control practice. Further, continuous uses of fungicide, which has one way mode of action, always lead the resistance development in target fungal disease, therefore use of combination or mixture of the fungicide which has different mode of action on target pathogen can prevent resistance development in harmful fungal pathogen.

One possibility for overcoming such difficulties is to alternate the active compounds used, so that the development of resistance can be prevented or at least slowed down. However, this requires the continual development of new active compounds, so as to avoid selection to the particular mechanism of action.

In contrast, it is more sensible to be able to employ combination which has proven sufficiently effective and able to control multiple diseases for as long as possible, especially when it has shown itself to be environmentally compatible to a particularly high degree and to possess only minimal side-effects.

The present invention relates to novel crop-protecting active ingredient mixtures having synergistically enhanced action, comprising at least two active ingredient components together with a suitable carrier, wherein component I is polymeric zinc propylenebis(dithiocarbamate), a bis-dithiocarbamate compound as active ingredient is known fungicidal compound and have been found to be effective against many fungal and bacterial diseases such as blight, blast leaf spot, rust, canker, scab, downy mildew, damping off in field crops, oil seeds, pulses, fruits and vegetables, nuts, ornamentals, etc. The activity of this compound is good; however, it is sometimes unsatisfactory a low application rates. The preparation of this compound is likewise known.

5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole , a triazole compound as active ingredient is known fungicidal compound and have been found to be effective against fungal diseases such as rice blast, scab, powdery mildew etc in several economical important crops such as paddy, apple, grape, vegetables etc. The activity of this compound is good at higher application dose which some time led the accumulation of residue in rice grain resulted harmful for human consumptions and recently has a concerned for residue in exported rice; however, at lower application dose, it is sometimes unsatisfactory to control the disease specially paddy blast.

Some of the fungicidal compositions containing triazoles are disclosed in the prior art.

Though the combinations in prior arts are effective, there is still a need to find a an effective and synergistic fungicide to control many fungal diseases in a wide range of field crops, fruit, nuts, vegetables, ornamentals, more particularly blast disease of paddy with reduced rate of individual active in combination.

Efficacy of the combination formulations in present invention are depends upon the use of proper quantities of ingredients of individual active. There are practical problems in dispensing exact quantities of the individual fungicidal formulation as tank mix by the farmer in the field. Use of the higher quantities of the individual fungicide then recommended dose can result in phytotoxicity, accumulation of residue in plant as well as lead wastage and hence higher cost. There are also possibilities of using fungicides with lower dose than recommended dosage, which can lead to fast resistance, insufficient disease control and crop loss.

Therefore, considering the importance of effective control of a wide spectrum of fungal diseases such as blast, blight, leaf spots, scabs etc. in economically important crops such as paddy, oil seed crops, pulses, fruits and vegetables etc and more particularly to control disease complex in paddy like blast, grain discolouration, brown leaf spot and false smut which occurs, usually, simultaneously need for a fungicidal composition which is table, synergistic, broad spectrum, ready to use and less expensive was felt.


OBJECT OF THE INVENTION:

The main object of the invention is to provide a broad spectrum fungicidal composition.

Another objective of the present invention is to provide a synergistic fungicide combination, the bio-efficacy of which is superior to the mixture of the individual formulations at reduced rate of application of individual active in combination which will prevent accumulations of residue in plant and its harvests.

Another object of the present invention is to provide an improved, stable and ready to use fungicidal composition effective against a wide spectrum of fungi such as scab, blasts, spots, blights, mildews, ruts etc., more specifically to control harmful fungal diseases on rice plants and their seeds, such as Pyricularia oryzae, Bipolaris spp., Helminthosporium spp., Rhizoctonia spp., Ustilaginoidea virens, Drechslera species, Alternaria spp. etc.

Another objective of the present inventions is to prevent resistant development in fungal diseases, more particularly in paddy fungal disease like blast, sheath blight, brown leaf spots etc.

Yet another objective of the present invention is to provide a fungicidal composition which is non-phytotoxic and results in high yield of various economically important crops such as paddy, rice, vegetables, grape, etc. and still further object of the present invention is to provide a fungicidal composition in a wettable powder form or water dispersible granular form.

Still further object of the present invention is to provide a fungicidal composition containing lower concentration of bis-dithiocarbamate and a triazole fungicide as compared to the known fungicide formulations containing individual ingredients.

Still further object of the present invention is to provide better plant growth and yield by supplementing Zinc from Zinc based fungicides, polymeric zinc propylenebis(dithiocarbamate).

Still further object of the present invention is to provide a fungicidal composition of bis-dithiocarbamate and a triazole fungicide to overcome the problems faced by the farmers of physically mixing the individual, commercially available formulations at the field.

Still further objective of the invention to load high actives in a single formulation.

Still further objective is to check out the physical compatibility of the actives.
Still further objective is to check out the chemical compatibility of the actives.
Still further objective is to select the type of formulation for such a high loading actives for optimum result and process development.

Still further objective is to develop the stable recipe of the actives using chelation complex.

BRIEF SUMMARY OF THE INVENTION:

The present invention relates to fungicidal mixtures for controlling rice pathogens, which mixtures comprise, as active components,
1) the polymeric zinc propylenebis (dithiocarbamate) of the formula I,
and
2) 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole of the formula II,
in a synergistically effective amount.

Moreover, the invention relates to a method for controlling rice pathogens using mixtures of the compound I with the compound II and to the use of the compound I with the compound II for preparing such mixtures and compositions comprising these mixtures

a. in the range of 20 to 80% of the total mass of the composition;
b. 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole in the range of 5 to 40 % of the total mass of the composition;
c. at least one wetting agent in the range of 1 to 5 % of the total mass of the composition;
d. at least one suspending agent in the range of 1 to 10 % of the total mass of the composition;
e. at least one stabilizer in the range of 0.5% to 3% of the total mass of the composition among which one stabilizing agent is Chelation complex in a range of 0.5 to 5% of the total mass of the composition ; and
f. optionally, fillers in the range of 1 to 20% of the total mass of the composition.

In preferred embodiment of the present invention, polymeric zinc propylenebis (dithiocarbamate) is preferably in the range of 50-60% of the total mass of the composition.

In preferred embodiment of the present invention, 5-methyl-1, 2, 4-triazolo [3, 4-bj [1, 3] benzothiazole is preferably in the range of 10 -20 % of the total mass of the composition.

Typically, the wetting agent is at least one compound selected from a group of compounds consisting of alcohol alkylate ,fatty alcohol ethoxylates, alkyl naphthalene sulfonate, sodium lauryl sulphates, sodium dodecyl benzene sulfonate and sodium dialkylnaphthalene sulfonate.

Typically, the suspending agent is at least one compound selected from a group of compounds consisting of sodium ligno sulfonate, calcium ligno sulfonate, sodium salt of alkyl naphthalene sulfonate condensate, Lignosulfonic acid, sodium salt sulfomethylated, sulfonated aromatic polymer, sodium salt, alcohol ethoxylates and fatty alcohol ethoxylates.

In preferred embodiment of the present invention the fungicidal composition is a wettable powder.

Typically, the wettable powder composition has a particle size in the range of 2 to 7 microns.

In preferred embodiment of the present invention the fungicidal composition is in the form of water dispersible granules and wettable powder.

Typically, the water dispersible granules have a particle size in the range of 100-1000 microns.

In accordance with another aspect of the present invention there is provided a process for preparing a synergistic fungicidal composition, said process comprising the following steps:
a. blending at least one fungicide selected from the group consisting of polymeric zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole, with at least one adjuvant selected from the group consisting of wetting agents, suspending agents, stabilizers, fillers
and water, to obtain a mixture;

b. grinding the mixture by at least one process selected from the group consisting of pulverizing and wet milling, to obtain a grinded mixture; and

c. blending the grinded mixture, to obtain the synergistic composition.
In preferred embodiment of the present invention, the process step c) comprises blending the grinded mixture with at least one ingredient selected from the group consisting of polymeric zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole fungicide suspending agents, wetting agents, stabilizers and fillers, to obtain the synergistic composition.

Typically, in step b) the grinded mixture is pulverized to obtain a pulverized powder. This can be tested for all in accordance with FAO guidelines.
In accordance with the preferred embodiment of the process of the present invention, at least one fungicide selected from the group consisting of zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole, is blended with at least one adjuvant selected from the group consisting of wetting agents, suspending agents, stabilizers and fillers,and water to get a mixture in the form of a slurry having total solid content in the range of 40 to 50%.
Typically, in step b) the grinded mixture is wet milled to obtain slurry having a particle size in the range of 1 to 8 microns.

In accordance with the preferred embodiment of the process of the present invention, the wet milled slurry is blended with at least one ingredient selected from the group consisting of wetting agents and suspending agents, to obtain second slurry with total solid content in the range of 50 to 65%.
Typically, the second slurry is spray dried to obtain the synergistic composition in the form of water dispersible granules.
Typically, the water dispersible granules have particle size in the range of 100 to 1000 microns.

In preferred embodiment of the present invention, in the process step a) at least one fungicide selected from the group consisting of zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole, is grinded and blended with at least one adjuvant selected from the group consisting of wetting agents, suspending agents, stabilizers, fillers and water, to obtain the synergistic composition.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 illustrates a synergistic fungicidal composition of zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole formulated using air jet mill lab model equipment.

Figure 2 illustrates a synergistic fungicidal composition comprising of zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole formulated using fluid energy air jet mill lab model equipment.

Figure 3 illustrate a synergistic fungicidal composition comprising of zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole formulated using Dyno mill lab model equipment.

Figure 4 illustrates a synergistic fungicidal composition of zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole formulated using lab model equipment.

DETAILED DESCRIPTION OF THE INVENTION

Fungicides: I
IUPAC NAME: Polymeric zinc 1,2 propylenebis(dithiocarbamate)
CAS NUMBER: (12071-83-9)

MOLECULAR WEIGHT: 289.78
MOLECULAR FORMULA: (C5H8N2S4Zn)n

Water solubility: In water 6.2 ppm (pH 7.5, 25 °C). Insoluble in most organic solvents; dissolves in solutions of powerful chelating agents but cannot be recovered from them

Uses: As a fungicide for wide range of field crops, fruit, nuts, vegetables, ornamentals, etc. More frequent uses include control of blast and brown leaf spot (Pyricularia oryzae and Drechslera oryzae) early and late blights {Alternaria solani and Phytophthora infestans) of potatoes and tomatoes; downy mildew {Plasmopara viticola) and black rot (Guignardia bidwellii) of vines; downy mildew (Pseudoperonospora cubensis) of cucurbits; scab (Venturia inaequalis) of apple; sigatoka {Mycosphaerella spp.) of banana and melanose (Diaporthe citri) of citrus. Typical application rates are 1000-2000 g/ha. Used for foliar application.

Fungicides: II

IUPAC: 5-methyl-1, 2, 4-triazolo [3, 4-b] [1, 3] benzothiazole
CAS Number 41814-78-2
MOLECULAR WEIGHT: 189.24
MOLECULAR FORMULA : C9H7N3S
Water solubility : 0.596 g / L (20 °C)
Form: Crystalline solid
5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole is a Systemic fungicide with protective and curative action

Uses: Control of many fungi including rice blast (Pyricularia oryzae).

This invention relates to a fungicidal composition containing a combination of fungicides such as zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole, which mutually affect each other when used together and display a biological activity greater than the sum of the activities when used alone.

In the course of our studies of fungicides we have found, that the combination of zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole, results in a synergistic mixture which is remarkably more effective than the individual compounds at the considered doses.

Zinc propylenebis(dithiocarbamate) is prepared by adding an aqueous mixture of Zinc Sulphate to an aqueous solution of disodium ethylene bisdithiocarbamate. To the resulting slurry required quantity of stabilizer and dispersing agent is added to get the Zinc propylenebis (dithiocarbamate).

5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole is prepared by reaction of oxirane with 1, 2, 4 triazole in the presence of a base.

The weight ratio of the components A and B depends on the sensitivity and resistance of the plants, the time of application, the climatic conditions and the soil conditions.

The synergistic composition of the present invention is prepared by initially mixing one of the active ingredients (5-methyl-1, 2, 4-triazolo [3, 4-bj [1, 3]benzothiazole) with a suspending agent / wetting agent / stabilizer in ribbon blender. The mixture is then grounded in a Jet mill. To this milled mixture a specified quantity of Zinc propylenebis(dithiocarbamate) is added to achieve the preferred ratio. Mixture obtained is then mixed again in ribbon blender to yield the desired composition. The method provides the synergistic mixture of Zinc propylenebis (dithiocarbamate) and 5-methyl-1,2,4-triazolo[3,4-bj[1,3]benzothiazole in a wettable powder form.
One aspect of the invention also provides a method of mixing the active ingredients with suspending agent / wetting agent / stabilizers / defoamers with water in a homogenizer. This slurry is then wet milled in dyno mill .To this wet milled slurry additional quantity of suspending agents / defoamers / adhesives is added to achieve the desired ratio. The slurry obtained is then spray dried to yield the desired composition. The process provides synergistic mixture of Zinc propylenebis (dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole in a water dispersible granular form.

The amount of Zinc propylenebis (dithiocarbamate) used in the composition is in the range of 50 to 85% of the total mass of the composition.
The amount of the 5-methyl-1, 2, 4-triazolo [3,4-bj[1,3]benzothiazole used in the composition is in the range of 5 to 20% of the total mass of the composition.

In accordance with the present invention, the stabilizers employed in the composition are selected from the group consisting of sodium metabisulphite (SMBS), Hexamethylene tetra mine (HMT), glycol, paraformadehyde and combination of HMT and SMBS.

The stabilizers are used in an amount in the range of 0.5% to 7% of the total mass of the composition, more preferably in the range of 0.5 to 3% of the total mass of the composition.

The wetting agent employed in the wettable powder compositon is selected from the group consisting of non-ionic surfactants, anionic surfactant and a mixture of anionic and non-ionic surfactant. The non-ionic surfactants are selected form the class of alcohol alkoxylate and fatty alcohol ethoxylates. The anionic surfactants are selected form the group of alkyl naphthalene sulfonate condensate, sodium lauryl sulphate and sodium dodecyl benzene sulfonate. The mixture of anionic and non-ionic surfactant is mainly a mixture of naphthalene sulfonate and fatty alcohol ethoxylates.
The wetting agent is used in an amount of 1 to 5%, more preferably 1 to 4% of the total mass of the composition.

The suspending agent is selected from the group consisting of sodium ligno sulfonate, calcium lignosulfonate and sodium salt of alkyl naphthalene sulfonate condensate. More preferably sodium salt of alkyl naphthalene sulfonate condensate is used as a suspending agent.

The suspending agent is used in an amount of 1 to 12%, preferably in 1 to 10% of the total mass of the composition.
The fillers is used in the range of 1 to 20% of the total mass of the composition.
Following is the list of surfactant used as wetting and suspending agents,
Surfactant A: Sodium ligno sulphonate (Borresperse NA)
Surfactant B: Sulfonated naphthalene condensate, sodium salt (Lomar D from Cognis)
Surfactant C: Sodium alkyl naphthalene sulphonate (Morwet IP from Akzonobel) Surfactant D: Modified Sodium Ligno sulphonate
Surfactant E: Sodium alkyl naphthalene sulfonate, formaldehyde condensate (Morwet D-450 from Akzonobel) Surfactant F: Sodium lauryl sulphate
Surfactant G: Polycondensate of naphthalenesulphonic acid sodium salt Surfactant H: Sodium dibutyl naphthalene sulphonate Surfactant I: Alkyl naphthalene sulfonate (Sellogen DFL) Surfactant J: Sodium alkyl naphthalene sulfonate Surfactant K: Blend of sodium salt of fatty alcohol sulfate and sodium naphthalene
Sulphonate formaldehyde condensate (Jeemol DW) Surfactant L: Blend of dialkyl naphthalene sulphonic acid and alcohol sulfate
(Jeemol WP) Surfactant M: Alcohol ethoxylates and fatty alcohol ethoxylate (Jeemol DML) Surfactant N: Blend of naphthalene sulfonic acid formaldehyde condensate and dioctyl Sulfosuccinate (Jeemol CI)

Surfactant O: Sulfonated aromatic polymer, sodium salt (Morwet D 425) Surfactant P: Calcium Ligno sulphonate Surfactant Q: Polyalkyl naphthalene sulphonate (MNS 90) and Surfactant R: Ligno sulfonic acid, sodium salt sulfomethylated
The stabilizers used in the present invention are selected from the group consisting of Hexamethylene tetra amine and Sodium metabisuiphite.
The fillers used in the present invention are selected from the group consisting of Polydimethylsiloxane powder (Dow corning 1920) and (Polydimethylsiloxane liquid)(Dow corning LDC 120A)

Figure 1 illustrates a synergistic fungicidal composition of Zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole formulated using air jet mill lab model equipment. Required quantity of adjuvant, stabilizer and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole technical is charged to the blender in stage-1 of pre-mixing. Blended mixture is directed from blender to jet mill via conveyer and is milled to reduce the particle size (range 2 to 7 microns) in stage-2 of pulverizing. Pulverized mixture is then transferred to a blender no 2 and the required quantity of dithiocarbamate technical is added in stage-3 of post blending to obtain Zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole. Stage-4 is sieving and analysis of the composition and stage-5 is packaging.

Figure 2 illustrates a synergistic fungicidal composition comprising of Zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole formulated using fluid energy air jet mill lab model equipment. Required quantity of adjuvant, stabilizer, Zinc propylenebis(dithiocarbamate) technical and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole technical is charged to a blender in stage-1 of Pre-mixing. Blender mixture is directed from blender to jet mill via conveyer and is milled to reduce the particle size (range 2 to 8 microns) in stage-2 of pulverizing. Pulverized mixture is transferred to blender no 2 , additional suspending agents/ wetting agents are added and it is blended in stage-3 of post blending to obtain Zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole blend.

Figure 3 illustrate a synergistic fungicidal composition comprising of Zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole formulated using Dyno mill lab model equipment. Required quantity of adjuvant, stabilizer, water and Zinc propylenebis(dithiocarbamate) technical and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole technical is charged to tank 1 in stage-1 of pre-mixing. Blended mixture is directed from tank 1 to Dyno mill via Pump and is milled to a particle size (range 2 to 5 or in the range 2 to 8 microns) in stage-2 of Grinding. Grinded slurry is transferred to Tank no 2 and the additional quantity of suspending / wetting agents / adhesive/ defoamers is added in stage-3 of post blending to obtain Zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole slurry. The slurry is then spray dried to obtain granules as per desired composition.

Figure 4 illustrates a synergistic fungicidal composition of Zinc propylenebis (dithiocarbamate) and 5-methyl-1, 2, 4-triazolo [3, 4-bj [1, 3] benzothiazole formulated using lab model equipment.

Required quantity of adjuvant, stabilizer ,defomars, adhesives , water and ground Zinc propylenebis(dithiocarbamate)(technical) and ground 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole (technical) is charged to Tank 2 to obtain Zinc propylenebis(dithiocarbamate) and 5-methyl-1 ,2,4-triazolo[3,4-bj[1,3]benzothiazole slurry. The slurry is spray dried to obtain granules as per desired composition.

Although the invention has been described above with reference to the disclosed embodiments, those skilled in the art will readily appreciate that the specific embodiments detailed are only illustrative of the invention. It should be understood that various modifications can be made without departing from the spirit of the invention. Accordingly, the invention is limited only by the following claims.