JPH11240813A - Polyoxin hydrated granule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the granule preparation that shows excellent disintegration, dispersibility and suspensibility when mixed with water, and can efficiently exhibit the agrochemical activity of polyoxin and is useful for prevention of plant diseases by using a polyoxin, surfactants and a water-soluble inorganic substance. SOLUTION: This preparation comprises (A) a polyoxin, preferably polyoxin D zinc salt or the like, preferably in an amount of 5-30 wt.% based on the whole preparation, (B) surfactants, preferably an anionic surfactant (preferably a sodium naphthalenesulfonate-formaldehyde condensate or the like) and a nonionic surfactant (preferably a polyoxyethylene alkyl ether or the like), preferably in an amount of 1-3 pts.wt. of the anionic surfactant per 1 pt.wt. of the component A and 0.1-0.3 pt.wt. of the nonionic surfactant per 1 pt.wt. of the component A, and (C) a water-soluble inorganic substance, preferably ammonium sulfate, preferably in an amount 1-5 pts.wt. per 1 pt.wt. of the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a water dispersible granule containing a polyoxin compound for controlling plant diseases.

[0002]

2. Description of the Related Art Streptomyces cacaoi bar asoensis (Streptomyces cacaoi)
var. The polyoxin compound produced by C. asoensis is a nucleoside antibiotic, and is known to inhibit the growth of plant pathogens such as rice sheath blight, black pear spot and rice sesame leaf blight. Therefore, pesticides containing a polyoxin compound as an active ingredient have been conventionally marketed as emulsions and wettable powders, and have been used as fungicides for fruit trees, tobacco, flowers, lawns, etc. for more than 30 years. .

However, conventional emulsions containing a polyoxin compound have the problem that the stability of the preparation is poor and the effective period is short. For this reason, the conditions of use were naturally limited, and the old emulsion had to be discarded. In addition, the effect of the conventional emulsion may not be stable depending on the type of solvent used and the dilution concentration, and the usability is not always good. Further, the conventional wettable powder containing a polyoxin compound has a problem that the amount of the active ingredient is low, powdering occurs, and disintegration and dispersibility are not constant. Further, since the clay mineral is used as the carrier, the clay mineral may adhere to the plant and become conspicuous. As described above, conventional preparations containing a polyoxin compound have various problems, and it has been necessary to provide a new preparation which has solved these problems.

On the other hand, in recent years, environmental pollution due to excessive use of pesticides has been gaining importance as a social problem.
In other words, it is necessary to prevent as much as possible the pesticides sprayed on plants and soil from flowing out into the surrounding rivers due to rainwater and the like, affecting fishes in the rivers and polluting tap water. For this reason, it is required to provide an agricultural chemical having an excellent effect at a low dose. Such requirements are particularly high at golf courses in which the total amount of pesticides used is regulated.

[0005] Some turf diseases at golf courses or the like cannot achieve a sufficient effect unless the pesticide application rate is locally increased. Conventional wettable powders are not sufficiently disintegratable, dispersible and susceptible and have a low amount of active ingredient. Therefore, in order to control such diseases, a large amount of treated water must be used. For this reason, when the conventional wettable powder is applied, the green may be soaked in water, which may hinder play. Therefore, there is also a need to provide a preparation that requires a small amount of treated water.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems of the prior art. That is, an object of the present invention is to provide a polyoxin compound-containing water dispersible powder having good disintegration, dispersibility, and suspension properties when mixed with water. Another object of the present invention is to provide a water dispersible granule capable of efficiently exhibiting the pesticidal activity of the polyoxin compound, having a high amount of active ingredient, and requiring a small amount of treated water.

[0007]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, obtained by mixing a polyoxin compound with a surfactant and a water-soluble inorganic substance to form a wettable powder. Thus, the present inventors have found that the polyoxin compound can effectively exert a plant disease controlling action, and have completed the present invention.

That is, the present invention provides a polyoxin compound,
It is intended to provide a water dispersible granule containing a surfactant and a water-soluble inorganic substance. The water dispersible granule of the present invention comprises polyoxin compounds such as polyoxin A, polyoxin B, polyoxin D, polyoxin E, polyoxin F, polyoxin G, polyoxin H, polyoxin J, polyoxin K, polyoxin L, polyoxin M, polyoxin N, polyoxin It preferably contains one or more compounds selected from the group consisting of O and salts thereof. Among them, it is particularly preferable to contain a polyoxin D zinc salt.

The water dispersible granule of the present invention contains, as surfactants, an anionic surfactant such as a formalin condensate of sodium naphthalene sulfonate and a nonionic surfactant such as polyoxyethylene alkyl ether. Is preferred. Further, as the water-soluble inorganic substance, for example, sodium sulfate or ammonium sulfate can be contained. The water dispersible granule of the present invention has a particle size of 90 to 500.
It is preferably in the range of μm.

The water-dispersible granules of the present invention can be used to prevent large patches of turf, brown patches, pseudo-leaf rot, Helminthosporium leaf blight, carbralia leaf blight, fairy ring disease or rose powdery mildew. Can be used to treat. Further, the water dispersible granule of the present invention is obtained by spraying a surfactant into a fluidized bed containing a polyoxin compound and a water-soluble inorganic substance, and granulating the resultant while drying.
It can be produced by a method of selecting particles having a particle size in the range of 500 μm, or the like.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the wettable powder of the present invention will be described in detail. The water dispersible granule of the present invention contains a polyoxin compound, a surfactant and a water-soluble inorganic substance as essential components. The polyoxin compound is added to the wettable powder of the present invention as an agrochemical active ingredient. Preferred specific examples of the polyoxin compound to be added include polyoxin A, polyoxin B, polyoxin D, polyoxin E, polyoxin F, polyoxin G, polyoxin H, polyoxin J, polyoxin K, polyoxin L, polyoxin M, polyoxin N, and polyoxin O.
And salts thereof. The type of the salt is not particularly limited, but is preferably a zinc salt, an iron salt or a titanium salt. These polyoxin compounds may be used alone or in a combination of two or more. Among them, polyoxin B, polyoxin D and salts thereof are preferable, and polyoxin D and salts thereof are more preferable. In particular, it is preferable to use a zinc salt of polyoxin D (JP-B-46-13364). The chemical structure of the main polyoxin compound is “THE MERCK IND
EX TWELFTH EDITION ”, page 1306.

The polyoxin compound used in the wettable powder of the present invention may be obtained by biological means or may be obtained by synthesis. When obtained by biological means, for example, Streptomyces kakaoi bar asoensis (Streptomy)
ces cacaoi var. asoensis)
Can be used. Culture conditions and operation methods can be appropriately determined according to the type and amount of the polyoxin compound to be obtained. The product of Streptomyces kakaoi bar asoensis may be used after being purified or may be used without purification.

As the water-dispersible granules of the present invention containing a polyoxin compound, surfactants generally used for the production of water-dispersible granules can be widely used. Among them, it is preferable to contain an anionic surfactant or a nonionic surfactant, and it is more preferable to contain both.
Examples of the anionic surfactant include, for example, formalin condensate of naphthalene sulfonate, alkenyl sulfonate, alkyl naphthalene sulfonate, lignin sulfonate, alkyl allyl sulfonate, polystyrene sulfonate, carboxymethyl cellulose salt And the like. Examples of the salt include an alkali metal salt such as a sodium salt and an alkaline earth metal salt such as a calcium salt. These anionic surfactants can be used alone or in combination of two or more. Among them, it is preferable to use a formalin condensate of naphthalene sulfonate, and it is more preferable to use a formalin condensate of sodium naphthalene sulfonate.

Examples of the nonionic surfactant include, for example,
Polyoxyethylene alkyl ether, polyoxyethylene dialkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene dialkyl aryl ether, polyoxyethylene styryl aryl ether, polyoxyethylene distyryl aryl ether, polyoxypropylene alkyl ether, polyoxypropylene Dialkyl ether, polyoxypropylene alkylaryl ether, polyoxypropylene dialkylaryl ether, polyoxypropylene styryl aryl ether, polyoxypropylene distyryl aryl ether, polyoxyethylene polyoxypropylene ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan Fatty acid esters, polyoxypropyl Alkyl esters, polyoxypropylene sorbitan fatty acid esters, sorbitan fatty acid esters, polyoxyethylene polyoxypropylene block polymers, higher fatty acid alkanolamide and the like. These nonionic surfactants can be used alone or in combination of two or more. Among them,
In particular, it is preferable to use polyoxyethylene alkyl ether.

The wettable powder of the present invention also contains a water-soluble inorganic substance as an essential component. The water-soluble inorganic substance used is preferably selected from those which do not excessively reduce the granulation properties of the wettable powder of the present invention. As the water-soluble inorganic substance, only one kind may be used alone, or two or more kinds may be used in combination. Among them, it is preferable to use sodium sulfate or ammonium sulfate, and it is particularly preferable to use ammonium sulfate.

The water-dispersible granules of the present invention may contain, in addition to the polyoxin compound, the surfactant and the water-soluble inorganic substance, other components as long as the desired effects of the present invention are not unduly inhibited. Can also. For example, a solid carrier used for a usual wettable powder can be used. In particular,
Clay minerals such as bentonite, kaolinite, montmorillonite, and siegrite can be used. As fillers, talc, mica, lime, apatite, diatomaceous earth, magnesium carbonate, silicic anhydride, pumice, vermiculite, gypsum, calcium carbonate, dolomite, zeolite, dextrin, sodium salt of carboxymethylcellulose, polyvinyl Pyrrolidone, sodium polyacrylate, polyvinyl alcohol, sodium ligninsulfonate, starch, crystalline cellulose, urea, wax and the like can also be used, but these additives are used to disintegrate and disperse the wettable powder of the present invention. And use within a range that does not unduly inhibit suspension.

In the water dispersible granule of the present invention, an insecticide, an acaricide, a herbicide, a fungicide, a plant growth regulator, a synergist, etc. may be used as an agricultural chemical active ingredient other than the polyoxin compound. Can also. However, these drugs must not unduly inhibit the activity of the polyoxin compound.

The component composition of the wettable powder of the present invention is not particularly limited as long as the intended object of the present invention can be achieved. The content of the polyoxin compound in the water dispersible granule is preferably 5 to 30% by weight. In addition, polyoxin compound 1
1 to 3 parts by weight of anionic surfactant based on parts by weight,
It is preferable that the amount is 0.1 to 0.3 parts by weight of the nonionic surfactant and 1 to 5 parts by weight of the water-soluble inorganic substance.

The method for producing the wettable powder of the present invention is not particularly limited, and a method generally used for producing a wettable powder can be used. For example, spray drying, tumbling granulation, fluidized bed granulation, stirring and mixing granulation,
It can be manufactured by granulating, granulating and drying by an extrusion granulation method, a crushing granulation method or the like. When granulating using a fluidized bed granulation method, it is preferable to spray a surfactant into a fluidized bed containing a polyoxin compound and a water-soluble inorganic substance, and granulate while drying. Also,
Alternatively, a method of manually granulating a mixture containing a polyoxin compound, a surfactant and a water-soluble inorganic substance with a screen and drying the mixture is also preferable. When sieving, granules in a desired particle size range can be obtained by appropriately adjusting the pore size of the sieve. The particle size of the wettable powder of the present invention is preferably in the range of 90 to 500 μm, more preferably in the range of 90 to 355 μm. In addition, the water dispersible granule of the present invention is also referred to as dry flowable.

The water dispersible granule of the present invention is characterized by having extremely excellent physical properties when mixed with water.
That is, when the water dispersible granule of the present invention is added to water, disintegration starts promptly and the powder is rapidly dispersed. Since the disintegration and dispersibility are extremely high as described above, if the water dispersible granule of the present invention is mixed with water before application, the components are sufficiently dispersed and can be rapidly prepared. Therefore, when the water dispersible granule of the present invention is used, a high disease control effect can be obtained even when applied immediately after mixing with water, and time and cost can be saved.

Further, the water dispersible granule of the present invention is characterized in that components dispersed in water stay relatively long in water without settling. Since the suspension property is extremely high as described above, a sufficient disease control effect can be obtained even if the operation of stirring before application is shortened or omitted. That is, the water dispersible granule of the present invention also has the utility of being able to cope with a case where the time from mixing with water to application is relatively long.

Furthermore, the water dispersible granule of the present invention has a feature that the amount of the active ingredient is higher than that of the conventional wettable powder, so that less dilution water is required. If the dilution water is small, it is possible to prepare a pesticide having a high active ingredient concentration, and the disease control effect can be efficiently exhibited. Therefore, the use of the water dispersible granule of the present invention makes it possible to reduce the amount of treated water, which is useful when it is necessary to suppress the amount of treated water. In particular, the use of the present invention is effective because a large amount of water impairs play in golf course greens and the like. In addition, if the present invention is utilized, it is not necessary to spray an agricultural chemical active ingredient excessively, so that it is possible to halt environmental pollution.

The use of the water dispersible granule of the present invention can also prevent soiling of plants. Clay minerals, which are widely used in conventional pesticides, generally adhere to plant surfaces during spraying and stay as they are for a long time. Clay minerals attached to the surface in this way may be noticeable as dirt,
In particular, when a houseplant is cultivated, its value is greatly reduced. In addition, when cultivating crops, the appearance of harvested products is deteriorated and the commercial value is reduced. Since the water dispersible granule of the present invention does not contain a clay mineral as an essential component, such adverse effects can be prevented by adjusting the amount of the clay mineral used according to the application object.

The wettable powder of the present invention can be used for effectively controlling various plant diseases which have been conventionally controlled by applying an emulsion or a wettable powder. . The type of plant disease to be controlled is not particularly limited. The water-dispersible granules of the present invention are particularly effective against large patches of turf, brown patches, pseudo-leaf rot, Helminthosporium leaf blight, carbralia leaf blight, fairy ring disease, and rose powdery mildew. It has been confirmed that the bactericidal activity is higher than that of a conventional wettable powder.

The method for applying the wettable powder of the present invention to plants and soil is not particularly limited. Usually mixed with water and sprayed on plants. It is general that the mixing ratio with water is such that the concentration of the polyoxin compound, which is an active ingredient of agricultural chemicals, becomes 20 to 400 ppm. In addition, when controlling powdery mildew of rose, the water dispersible granule of the present invention is 500 to 600.
It is generally used by diluting it by a factor of 0. When mixed with water, for example, insecticides, acaricides, herbicides, fungicides,
Other agents such as plant growth regulators, synergists and the like can also be mixed.

The application rate of the water dispersible granule of the present invention depends on the application scene,
It is appropriately determined in consideration of the application time, application method, control target, and the like. For example, when using a water dispersible granule containing zinc salt of polyoxin D to control large patches, brown patches and simulated leaf rot of turf, Helminthosporium leaf blight, and Carburaria leaf blight, 1 m per time. ^It is suitable to apply 0.25 to 2.5 g per ^{2 and} 30 to 60 g per 1 m2 at a time when controlling Fairy Ring disease.

Examples of the method of application include a method of spraying using a sprayer. The application target can appropriately determine the foliage of the plant, soil, and the like according to the type of the disease to be controlled. In addition, as a place of application, golf courses and parks having paddy fields, fields, orchards, lawns, and the like, pastures, forests, plateaus, potted plants, and the like can be targeted.

The water-dispersible granules of the present invention may be applied for prevention before plant disease onset or for treatment after onset of plant disease. In particular, in the case of turf diseases, it is also effective for treatment after the onset. In the case of large patches, brown patches, Helminth sporium leaf blight and carburaria leaf blight, spraying before and at the beginning of infection is effective. In the case of pseudo leaf rot, it is most effective to spray before the dormancy period.

[0029]

The present invention will be described more specifically with reference to the following examples and test examples. The materials, amounts, ratios, operations, and the like shown in the following specific examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the following specific examples. In addition, "%" and "part" described below represent% by weight and part by weight unless otherwise specified. The polyoxin D zinc salt raw material used in the production of the wettable powder has a purity of 22%.
% Polyoxin D zinc salt.

Example 1 A fluidized bed granulator was charged with 50 parts of a polyoxin D zinc salt raw material and 30 parts of ammonium sulfate to form a fluidized bed.
The parts were mixed well while spraying. Further, 18 parts of a formalin condensate of sodium naphthalene sulfonate was added to 40 parts of
% Aqueous solution was sprayed into the fluidized bed and granulated while drying at 50 ° C to 60 ° C. Thereafter, the standard particle size was classified with a vibration sieve to obtain a water dispersible granule having a particle size of 250 to 500 μm and containing 11% of a polyoxin D zinc salt.

(Example 2) Example 1 by changing the sieve used
By performing the same operation as described above, the particle size is 90 to 355 μm.
To obtain a wettable powder with 11% of zinc salt of polyoxin D. (Example 3) 50 parts of a zinc salt of polyoxin D, 30 parts of ammonium sulfate, 18 parts of a formalin condensate of sodium naphthalenesulfonate, and 2 parts of polyoxyethylene alkyl ether were put into a beaker so that the total amount became 500 g, and the mixture was sufficiently filled. Mixed. Thereafter, 200 ml of water was gradually added and kneaded, and the mixture was manually granulated with a 0.7 mm screen and dried at 60 ° C. After sieving on a sieve, particle size 250 ~
A wettable powder with 11% of zinc of 500 μm of polyoxin D was obtained.

Example 4 Polyoxin D zinc salt drug substance 5
0 parts, ammonium sulfate 30 parts, formalin condensate of sodium naphthalene sulfonate 20 parts 500 g in total
Into a beaker and mixed well. Thereafter, 220 ml of water was gradually added and kneaded, and the mixture was granulated by hand with a 0.7 mm screen and dried at 60 ° C. After sieving on a sieve, polyoxin D having a particle size of 250 to 500 μm
A wettable powder with 11% of zinc salt was obtained.

Example 5 Polyoxin D zinc salt drug substance 5
0 parts, clay 15 parts, ammonium sulfate 15 parts, formalin condensate of sodium naphthalene sulfonate 18 parts,
2 parts of polyoxyethylene alkyl phenyl ether sulfate was put into a beaker so that the total amount became 500 g, and mixed well. Thereafter, 220 ml of water was gradually added and kneaded, and the mixture was manually granulated with a 0.7 mm screen.
Dried at 60 ° C. After sieving on a sieve, the particle size is 250-50
A water dispersible granule containing 11% of a polyoxin D zinc salt of 0 μm was obtained.

(Test Example 1) Granulation test The granulation properties of the water-dispersible polyoxin granules produced in Examples 1 and 3 to 5 were visually observed, and the granulation state was evaluated as “good”.
The evaluation was made in three stages of "permissible" and "impossible".

(Test Example 2) Disintegration test in water (1) 100 ml of the polyoxin granule wettable powder prepared in Examples 1 and 3 to 5 was placed in a 250 ml cylinder.
Was observed in water disintegration when thrown into water, and evaluated in the following three stages. A: Most of the particles disintegrate and disperse before reaching the bottom of the cylinder. B: Disperses while drawing a thread in water, or disintegrates and disperses until about 50% reaches the bottom of the cylinder. C: Most do not collapse and disperse and reach the bottom of the cylinder.

(Test Example 3) Disintegration test in water (2) 0.5 g of the polyoxin water dispersible powder prepared in Examples 1 and 3 to 5 was placed in a 250 ml cylinder and placed in a 100 m
1 minute after the water-dispersible granules reached the bottom of the cylinder, the cylinder was slowly turned over and the disintegration was observed. When all did not disintegrate, the operation of slowly inverting the cylinder was repeated 2 seconds after the wettable powder reached the bottom of the cylinder again, and the inversion was repeated until all the polyoxin wettable powder had disintegrated.
The number of falls was recorded for each polyoxin water dispersible powder.

Test Example 4 Suspension Test After observing the disintegration property in water in Test Example 3, the cylinder was further inverted 20 times. Immediately thereafter, the dispersion was transferred to a sedimentation tube, and the sedimentation amount was measured after 5 minutes, 15 minutes, and 30 minutes. Table 1 shows the results of Test Examples 1 to 4.

[0038]

[Table 1]

The results in Table 1 show that all of the water dispersible granules of the examples are excellent in granulation properties, disintegration properties in water, and suspension properties. In particular, the wettable powders of Examples 1 and 3 are extremely excellent in these physical properties.

Test Example 5 Effect Test on Turf Brown Patch The polyoxin wettable powder of Example 2 and a commercially available polyoxin wettable powder (trade name: polyoxin Z wettable powder, active ingredient: polyoxin D zinc salt) 2.25%, manufacturer: Kaken Pharmaceutical Co., Ltd., hereinafter referred to as “Comparative Example 1” and mepronil wettable powder (trade name: clean grass wettable powder, active ingredient mepronil 75%, manufacturer: Riken Green Co., Ltd.)
Comparative Example 2) was used to conduct an effect comparison test on turf brown patches.

The diluted each agent in a predetermined ratio described in Table 2, it was sprayed per liter 1 m ² lawn observed onset initial brown patch a number in horticultural sprinkling (pen cross bentgrass). Spraying was performed four times every 12 days. The test was performed in a continuous manner of 1 m ² per section, and the lesion area ratio of each section was measured after the fourth application. Table 2 shows the results. In addition, when phytotoxicity was determined with the naked eye, no phytotoxicity was observed in each section.

[0042]

[Table 2]

The results in Table 2 show that when the polyoxin wettable powder of Example 2 was applied, the turf brown was lower than when the polyoxin wettable powder of Comparative Example 1 and the mepronil wettable powder of Comparative Example 2 were applied. This shows that the patch lesion area ratio was reduced. In particular, the polyoxin wettable powder of Example 2 is clearly more effective than the mepronil wettable powder of Comparative Example 2, and effectively suppresses the expansion of brown patches in the early stage of disease onset.

(Test Example 6) Effect test on large patch of turf Water dispersible polyoxin granules of Example 2, commercially available polyoxin dispersible powder of Comparative Example 1, and pencyclone dispersible powder (trade name:
Using Monseren wettable powder, active ingredient: pencyclon 25%, manufacturer: Nippon Bayer Agrochem Co., Ltd., hereinafter referred to as “Comparative Example 3”, an effect comparative test on large turf patches was conducted. Each drug was diluted to a predetermined magnification shown in Table 3, and 1 liter per 1 m ² was sprayed on a lawn (nosiba) where large patches frequently occurred using a power sprayer. Spraying was performed four times every 12 days. The test was performed in a continuous manner of 1 m ² per section, and the lesion area ratio of each section was measured after the fourth application. Table 3 shows the results.

[0045]

[Table 3]

The results shown in Table 3 show that when the polyoxin wettable powder of Example 2 was applied, the turf size was larger than when the polyoxin wettable powder of Comparative Example 1 and the pencyclone wettable powder of Comparative Example 3 were applied. This shows that the patch lesion area ratio was reduced. In particular, the polyoxin wettable powder of Example 2 is clearly more effective than the polyoxin wettable powder of Comparative Example 1.

(Test Example 7) Simulated leaf rot of turf (spring baldness)
Effect test on polyoxin granule wettable powder and tolclofosmethyl wettable powder of Example 2 (trade name: Grancer wettable powder, active ingredient:
Using tolclofos-methyl 75%, manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as “Comparative Example 4”, a comparative effect test on simulated leaf rot (spring baldness) of turf was performed.

Each drug was diluted to a predetermined magnification shown in Table 4, and a predetermined amount was sprayed on a fairway of a mixture of blackgrass and wildgrass, where pseudo leaf rot was frequent, using a tank truck. The spraying was performed twice on October 26 and November 9. Test 1
Done in duplicate system of ward 50m ^2, it was measured lesion area ratio of each plot the following year of April 12. Table 4 shows the results. In addition,
When phytotoxicity was judged with the naked eye, no phytotoxicity was observed in each section.

[0049]

[Table 4]

The results shown in Table 4 show that the polyoxin water-dispersible powder of Example 2 has the same high effect on the pseudo leaf rot with a smaller dose than the tolclofosmethyl water-dispersible powder of Comparative Example 4.

(Test Example 8) Test of the effect of turf on leaf blight of carburaria Polyoxin water dispersible powder of Example 2 and thiuram.T
PN wettable powder (trade name: Dako Green wettable powder, active ingredient:
TPN 50%, Thiuram 30%, Manufacturer: SD Corporation
S Biotech, hereinafter referred to as “Comparative Example 5”)
A comparative study was conducted on the effects of turf on carburaria leaf blight.

Each drug was diluted to a predetermined magnification shown in Table 5, and a predetermined amount was sprayed on the rice brassicae, on which the blight of carburaria began to occur from late May on May 26. The test was performed in three sections of 2 m ² per section, and on June 5, the diseased area ratio of each section was measured. Table 5 shows the results. In addition, when phytotoxicity was determined with the naked eye, no phytotoxicity was observed in each section.

[0053]

[Table 5]

The results in Table 5 show that when the water-dispersible polyoxin granules of Example 2 were applied, the thiuram-TP of Comparative Example 5 was used.
The results show that the control value against turfgrass leaf blight is higher than when N wettable powder is applied.

(Test Example 9) Effect test on pseudo leaf rot (footprint of elephant) Using the polyoxin granule water dispersible powder of Example 2 and the commercially available tolclofos methyl wettable powder of comparative example 4, pseudo leaf rot (elephant leaf rot) Effect footprint). Each drug was diluted to a predetermined magnification shown in Table 6, and a predetermined amount was sprayed on a tanker truck from early September on rough nosyba where pseudo leaf rot developed. The test was performed at 100 m ² in one section and 10
On March 28, the lesion area ratio of each section was measured. Table 6 shows the results. In addition, when phytotoxicity was determined with the naked eye, no phytotoxicity was observed in each section.

[0056]

[Table 6]

The results in Table 6 show that the water-dispersible polyoxin granules of Example 2 exert the same high effect on pseudo leaf rot with a smaller dose than the tolclofosmethyl water-dispersible powder of Comparative Example 4. ing.

(Test Example 10) Effect Test on Rose Powdery Mildew A comparative test was carried out on the powdery mildew of rose using the polyoxin wettable powder of Example 2 and the commercially available polyoxin wettable powder of Comparative Example 1. . Each drug was diluted to the predetermined magnification shown in Table 7, and 500 roses were infected with powdery mildew (cultivar: Pauls Pink, cultivated in Wagner pot).
ml. Spray on September 19, September 26, 10
The tour was held four times on March 3 and October 9. The test is 1 treatment 1
The test was carried out on a plant body, and on October 16, each section was surveyed. 1
The disease severity was determined from the lesion area of 30 leaves per ward according to the following formula, and the control value was calculated from the value. Table 7 shows the results.

[0059]

[Equation 1] Degree of disease = [Σ (index × number of applicable leaves) / 4 × number of investigated leaves] × 100 Control value = (1-Degree of disease on treatment area / Degree of disease on non-treatment area) x 1
00

[0060]

[Table 7]

The results in Table 7 show that the polyoxin wettable powder of Example 2 has a higher control value against powdery mildew of rose than the polyoxin wettable powder of Comparative Example 1.
When the wettable powder of Comparative Example 1 was applied, slight soiling of leaves was observed, but when the wettable powder of Example 2 was applied, no soiling of the chemical was observed at all.

[0062]

The water dispersible granules of the present invention containing a polyoxin compound have extremely good disintegration, dispersibility and suspension properties when mixed with water. According to the present invention,
Since a water dispersible granule having a high active ingredient content can be prepared, the pesticidal activity of the polyoxin compound can be efficiently exhibited. For this reason, the amount of water treated with the polyoxin compound can be significantly reduced as compared with the conventional chemicals.
In addition, the water dispersible granules of the present invention are easy to handle because they are free of dust and have excellent storage stability. Furthermore, since the water dispersible granule of the present invention does not contain a clay mineral as an essential component, it can be formulated so as not to stain the applied plant. Since the wettable powder of the present invention has such excellent properties, it can be widely used when disease control by a polyoxin compound is required. In particular, it can be effectively used when it is desired to suppress the use of pesticides, to reduce the application rate, or to attach importance to measures for environmental pollution.

Claims (10)

[Claims] 1. A water dispersible granule containing a polyoxin compound, a surfactant and a water-soluble inorganic substance. 2. The polyoxin compound includes polyoxin A, polyoxin B, polyoxin D, polyoxin E, polyoxin F, polyoxin G, polyoxin H, polyoxin J, polyoxin K, polyoxin L, polyoxin M, polyoxin N, and polyoxin O.
The water-dispersible granule according to claim 1, which comprises one or more compounds selected from the group consisting of and salts thereof. 3. The water dispersible granule according to claim 2, which contains a zinc salt of polyoxin D as the polyoxin compound. 4. The method according to claim 1, wherein the surfactant contains an anionic surfactant and a nonionic surfactant.
A water dispersible granule according to any one of the above. 5. The water dispersible granule according to claim 4, comprising a formalin condensate of sodium naphthalene sulfonate as the anionic surfactant. 6. The water dispersible granule according to claim 4, which contains a polyoxyethylene alkyl ether as the nonionic surfactant. 7. The water dispersible granule according to claim 1, wherein the water soluble inorganic substance contains sodium sulfate, ammonium sulfate, or both. 8. The water dispersible granule according to claim 1, wherein the particle size is in the range of 90 to 500 μm. 9. A method for preventing or treating large patches of turf, brown patches, pseudo-leaf rot, Helminth sporium leaf blight, carbralia leaf blight, fairy ring disease or rose powdery mildew. A water dispersible granule according to any one of claims 1 to 8. 10. A method comprising spraying a surfactant into a fluidized bed containing a polyoxin compound and a water-soluble inorganic substance, granulating while drying, and selecting particles having a particle size in the range of 90 to 500 μm. The water dispersible granule according to any one of claims 1 to 9, which is produced.