JPH07233015A - Water-dispersible agent for spraying for control of seed disease injury - Google Patents

Abstract

PURPOSE:To provide a water-dispersible agent used for spraying on seeds and containing pefurazoate as an active ingredient for controlling seed disease injuries, and capable of easily redispersing precipitates in water, the precipitates being generated when a highly concentrated diluted solution is produced with a low times volume of water. CONSTITUTION:The water-dispersible agent for spraying for the control of seed disease injuries contains pefurazoate as an agricultural chemical active ingredient and superfine silicate particles as a carrier in a predetermined weight ratio, contains urea or at least one of water-soluble saccharides and denatured starch as water-soluble fillers, and further contains a nonionic surfactant and/or an anionic surfactant, wherein the surfactants are added in such an amount as that the surface tension of a diluted solution obtained by dispersing the water-dispersible agent in an 10 weight times volume of water is 25-55mN/m at 20 deg.C.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to penta-4-enyl-
A wettable powder containing N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate (hereinafter referred to as "pefurazoate") as a pesticidal active ingredient for disease control of seeds, the wettable powder being treated with water. Even when diluted to a high-concentration diluted solution, the solid precipitate that has once settled can be easily redispersed in water by simple stirring or shaking. Good redispersibility. Spray hydration for controlling seed diseases. Regarding agents.

[0002]

2. Description of the Related Art Pefurazoate is known as a seed disinfectant to have an excellent control effect against bacillus seedling fungi of rice ("Agricultural Chemicals Handbook", 1992, July 30, 1993, Published by Japan Plant Protection Association, pages 224, 549). As a method for disinfecting seeds with a seed disinfectant such as pefurazoate, a wettable powder using a mineral carrier such as clay is prepared in the same manner as a general wettable powder, and diluted with 20 to 200 times by weight water. A method of making a liquid and immersing seed paddy in this is generally performed.

On the other hand, in order to disinfect a large amount of seeds with a chemical,
The wettable powder is diluted to a high concentration, specifically, diluted with 3 to 20 times by weight of water to obtain a diluted solution (hereinafter, this is referred to as "high-concentrated diluted solution").
That is, a method of spraying a high-concentration diluting liquid in an amount corresponding to 3% of the weight of dry seeds on the seeds using a spray device for seed disinfection is becoming popular. However, when using a wettable powder prepared by using mineral fine powder such as ordinary clay as a carrier to dilute this with water to prepare a high-concentration diluting solution and performing work with a sprayer for seed disinfection, this diluting solution is used. If the mixture is not stirred, a fine powder of a mineral substance or a suspension of pesticide active ingredient particles will precipitate in the diluent.

Therefore, it is necessary to constantly stir the chemical liquid in the tank during the operation from the preparation of the diluting liquid to the spraying. At this time, the chemical liquid flows in the flow path of the chemical liquid without stagnation, Little precipitation. However, if the high-concentration diluent remains in the chemical tank or the chemical channel of the spraying device after the work is completed, the precipitate accumulates and hardens, forming a hard cake that can be easily redispersed. is not. Therefore, in this case, it is extremely difficult to restart the spraying device.

On the other hand, in order to improve the dispersibility of a diluting liquid of a wettable powder, a polyoxyethylene polyoxypropylene block polymer sulfate ammonium salt is used as a dispersant in a wettable powder containing a mineral carrier such as clay. A compounding method (Japanese Patent Publication No. 02-44802) or a method of compounding polyoxyethylene tristyrylphenyl ether sulfate sodium salt (JP-A-63-5430).
No. 1) is known.

Further, 5-ethyl-
Contains 5,8-dihydro-8-oxo-1,3-dioxolo (4,5-g) quinoline-7-carboxylic acid and contains alkali metal or ammonium sulfates, nitrates, chlorides and surfactants A wettable powder for seed treatment is known, which has excellent dilutability without causing problems such as hard cake even when the wettable powder is diluted with a small amount of water to obtain a high-concentration diluted solution (Japanese Patent Laid-Open No. 124914/1993). Gazette).

Further, an agrochemical water for seed treatment comprising an agrochemical active ingredient such as pefurazoate, an anionic surfactant such as sodium ligninsulfonate, diatomaceous earth, synthetic hydrous silicic acid, an inert carrier such as sugar, starch and dextrin. There is known a method of preparing a water-diluted solution of a disinfectant for seed disinfection by adding a higher fatty acid ester of polyoxyalkylene, particularly montanic acid ester, when diluting the disinfectant with water (JP-A-5-339104). ).

[0008] However, when these existing wettable powders are used as highly concentrated diluents for seed spraying, they are not always satisfactory in terms of redispersibility of precipitates formed. Therefore, it is desired to develop a wettable powder capable of spraying seeds for disinfecting seeds without such drawbacks.

In such a situation, the object of the present invention is to
It is an object of the present invention to provide a wettable powder for spraying for controlling seed diseases, which has a good redispersibility of a precipitate generated when diluted with water.

[0010]

Means for Solving the Problems The inventors of the present invention have made extensive studies to solve the above problems. As a result, when a wettable powder having the composition and characteristics shown below is prepared, even if a high-concentration diluting solution is prepared so as to have various concentrations with water, in any case, it occurs when diluted with water. The present invention has been completed by finding that a wettable powder for seed spraying having a good redispersibility of precipitates can be produced.

The gist of the first aspect of the present invention is that penta-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate as an agricultural chemical active ingredient and a carrier for supporting the same. As fine particles of silicic acid, 0.2 to 2 of the carrier is used per 1 part by weight of the pesticide active ingredient.
It is contained in a ratio of parts by weight, and further contains urea or at least one selected from water-soluble sugars and modified starches as a water-soluble extender, and also contains a nonionic surfactant and / or anionic surface-active agent. At least one of the activators
A seed-containing spray dispersible powder for controlling seed diseases, wherein the diluting solution obtained by dispersing the dispersible powder in 10 times by weight of water has a surface tension of 25 to 55 mN / m at 20 ° C. The spray wettable powder for controlling seed diseases is characterized in that a surfactant is added in an amount so as to fall within the range.

Next, the wettable powder for seed spraying according to the first aspect of the present invention will be specifically described. The chemical structural formula of penta-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate, that is, pefrazoate, which is the agricultural chemical active ingredient of the present invention, is shown below.

[0013]

The content of pefurazoate in the wettable powder according to the present invention is not particularly limited, but is 5 to 50% by weight based on the total composition of the wettable powder.

The finely divided silicic acid as a carrier for supporting pefurazoate is commonly referred to as white carbon or silica, and is hydrous silicic acid, hydrous calcium silicate or hydrous aluminum silicate obtained by a wet method. And a silicic acid anhydride obtained by a dry method or the like. In the wettable powder of the present invention, the finely divided silicic acid is contained in an amount of 0.2 to 2 parts by weight, preferably 0.5 to 1 part by weight, based on 1 part by weight of pefrazoate.
It is blended in a ratio of parts by weight. The particle size of this siliceous carrier is
An average particle size of 0.1 micron to 100 microns is preferred.

Urea or water-soluble sugars or modified starches can be used as a water-soluble bulking agent to be added to the wettable powder according to the present invention. Water-soluble sugar is 2
Refers to sugars that have a solubility in water at 0 ° C of 10% or more,
Specifically, sugars include glucose, sucrose, fructose, lactose and the like. Examples of the modified starch include dextrin, acid-decomposed starch, oxidized starch, pregelatinized starch, starch derivative and the like.

In the wettable powder of the first aspect of the present invention, these water-soluble sugars and modified starch may be used alone or in combination of two or more kinds. In the wettable powder according to the first aspect of the present invention, the water-soluble extender is 0.2 to 1 part by weight of pefrazoate.
It can be blended in a ratio of 20 parts by weight, preferably 0.5 to 5 parts by weight. The wettable powder is preferably contained in a proportion of 25 to 90% by weight based on the total composition of the wettable powder.

The surfactant used in the present invention includes:
The wettable powder is not particularly limited as long as it is usually used for imparting wettability and wettability. For example, the following may be mentioned.

Examples of nonionic surfactants Polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene arylphenyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, polyethylene glycol Polypropylene glycol block polymer etc.

Examples of anionic surfactants Alkyl sulfate, polyoxyethylene alkylphenyl ether sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene arylphenyl ether sulfate, polyoxyethylene arylphenyl ether sulfate ammonium salt , Polyethylene glycol polypropylene glycol block polymer sulfate, lignin sulfonate, alkyl naphthalene sulfonate, alkyl naphthalene sulfonate formalin condensate, naphthalene sulfonate formalin condensate, alkylbenzene sulfonate, polyoxyethylene arylphenyl ether sulfonate salt and the like.

These surfactants are the same as the wettable powder of the present invention.
The surface tension of the diluted solution obtained by dispersing it in 0 weight times water is 25 to 55 mN / m (millinewton / meter) at 20 ° C.
It is sufficient to add to the wettable powder in an amount sufficient to fall within the range of
0.05 to 5 parts by weight, preferably 0.1 to 3 parts by weight, can be added to 1 part by weight of pefurazoate. If the surfactant is added to the wettable powder according to the first invention in an amount of 0.5 to 20% by weight, preferably 1 to 15% by weight, based on the total composition of the wettable powder in view of its effect and economy. Good.

In the wettable powder of the present invention, in addition to pefurazoate, other pesticidal active ingredients generally used for seed spraying can be used in combination. As specific examples, the pesticidal active ingredients shown below can be added, but the present invention is not limited thereto.

1) Methyl-1- (butylcarbamoyl)
2-Benzimidazole carbamate 2) 2- (4-thiazolyl) benzimidazole 3) 2- (methoxycarbonylamino) benzimidazole 4) 1,2-bis (3-methoxycarbonyl-2-thioureido) benzene 5) bis ( Dimethylthiocarbamoyl) disulfide

6) Basic copper chloride 7) Cupric hydroxide 8) N-propyl-N- [2- (2,4,6-trichlorophenoxy) ethyl] imidazole-1-carboxamide 9) (E)- 4-chloro-α, α, α-trifluoro-
N- (1-imidazol-1-yl-2-propoxyethylidene) -o-toluidine 10) 2-[(4-chlorophenyl) methyl] -5- (1
-Methylethyl) -1- (1H-1,2,4-triazol-1-ylmethyl) -cyclopentanol 11) 0,0-dimethyl-0- (3-methyl-4-nitrophenyl) thiophosphate

The content of the agrochemical active ingredient used in combination in the wettable powder is not particularly limited, but is 5 to 50% by weight.

In the wettable powder of the present invention, as auxiliary agents, for example, stabilizers such as antioxidants and photodegradation inhibitors,
If necessary, one type or two or more types of foam inhibitors may be mixed and used.

The method for preparing the wettable powder for spraying seeds of the present invention is the same as the conventional wettable powder such as pefurazoate, siliceous carrier, nonionic surfactant and / or anionic surfactant, water-soluble agent. If necessary, an auxiliary agent such as an oil absorbing agent is added to the sex extender, and the mixture is uniformly mixed, and then finely pulverized. In addition, it can be prepared by an ordinary apparatus for preparing a wettable powder, and no special apparatus is required. Examples of the fine pulverization method include air flow type pulverization such as a jet atomizer and impact type pulverization such as a hammer mill.

When the wettable powder of the present invention is diluted with water, in the diluted solution, a part of pefurazoate is emulsified by the surfactant, but the rest is dispersed in water while being supported on finely divided silicic acid. it seems to do. In this state, the solid particles which are emulsified and dispersed are fine, and when the diluent is left to stand, the solid particles precipitate and become a solid precipitate, that is, a hard cake, which is difficult to redisperse in water. By adding a water-soluble extender thereto, in the wettable powder of the present invention, the pephrazoate fine particles, the finely divided silicic acid, the nonionic surfactant and / or the anionic surfactant and the water-soluble extender do not interact with each other. This causes weak aggregation between the emulsified and dispersed particles, and the particles apparently become large, resulting in a precipitate in a weakly aggregated state and not becoming dense, resulting in a loosely aggregated precipitate. Therefore, it is considered that re-dispersion in the precipitate can be improved by allowing good re-dispersion in water by light stirring or shaking.

In the wettable powder of the present invention, the kind and blending amount of the surfactant are adjusted so that the surface tension of the diluted solution when diluted with 10 times the amount of water falls within the range of 25 to 55 mN / m. .

In order to impart a surface tension of less than 25 mN / m to the diluting solution, it is possible to use a surfactant having a large surface tension lowering ability or to mix a large amount of the surfactant. The emulsion dispersion of becomes finer and the precipitate becomes harder. On the other hand, to show a surface tension of more than 55 mN / m,
It is possible to use a surfactant having a small surface tension lowering ability or a small amount of a surfactant, but in this case, suitable hydration properties, dispersibility, and adhesion to seeds cannot be obtained, and The redispersibility of the precipitate in the diluent is also poor.

According to a preferred embodiment of the wettable powder according to the first aspect of the present invention, penta-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate is used as a wettable powder as an agrochemical active ingredient. It is contained in a ratio of 5 to 50% based on the weight, and contains 0.5 to 1 part by weight of fine powder of hydrous or anhydrous silicic acid or calcium silicate as a carrier per 1 part by weight of the agrochemical active ingredient. Urea or sucrose or dextrin as a bulking agent is contained in a ratio of 0.5 to 5 parts by weight per 1 part by weight of the agrochemical active ingredient, and polyoxyethylene sorbitan fatty acid ester or polyoxyethylene sorbitan fatty acid ester and lignin is used as a surfactant. Both with sulfonate, or with polyoxyethylene sorbitan fatty acid ester and naphthalene Honeto - 0.1 of the surfactant both a formalin condensate per part by weight of the pesticidal active ingredient
It is a wettable powder contained in a ratio of 3 to 3 parts by weight, and the surface tension of the diluted solution obtained by dispersing the wettable powder in 10 times by weight water is in the range of 30 to 40 mN / m at 20 ° C. A wettable powder is provided in which the surfactant is added in an amount so as to be added.

The wettable powder according to the first aspect of the present invention having the above composition is excellent in evaluating the redispersibility of the precipitate in the cylinder repeated inversion test described in Test Example 2 described below for the water-diluted solution. Shows redispersibility.

When the number of cylinder inversions is 10 or less in this repeated cylinder inversion test, the redispersibility of the tested wettable powder is particularly excellent. According to the study of the present inventor, in the wettable powder according to the first aspect of the present invention, when urea is inevitably added as a water-soluble bulking agent in addition to sugars and starches, the redispersibility is urea-free. It was recognized that the improvement was particularly excellent compared to the formulation.

Therefore, according to the second aspect of the present invention, penta-4-enyl-N-furfuryl-N as an agrochemical active ingredient is used.
-Imidazol-1-ylcarbonyl-DL-homoalaninate and finely divided silicic acid as a carrier for supporting the same at a ratio of 0.2 to 2 parts by weight of the carrier per 1 part by weight of the agrochemical active ingredient, and further urea. Spray hydration for controlling seed diseases containing water-soluble saccharides or modified starches as a water-soluble bulking agent and also containing at least one of a nonionic surfactant and / or an anionic surfactant. And a diluting solution obtained by dispersing the wettable powder in 10 times by weight of water has a surface tension of 25 to 55 at 20 ° C.
There is provided a sprayable wettable powder for controlling seed diseases, which is characterized in that a surfactant is added in an amount so as to be in the range of mN / m.

According to a preferred embodiment of the second wettable powder of the present invention, penta-4-enyl-N is used as the agrochemical active ingredient.
-Furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate based on the weight of wettable powder 5
It is contained at a ratio of up to 50%, and a fine powder of hydrous or anhydrous silicic acid or calcium silicate as a carrier is used as a pesticide active ingredient.
It is contained in a ratio of 0.5 to 1 part by weight per part by weight, and the total amount of the water-soluble extender is urea and sucrose or dextrin or acid-decomposed starch or glucose as a water-soluble extender per 1 part by weight of the agricultural chemical active ingredient. At a ratio of 0.5 to 5 parts by weight, and polyoxyethylene sorbitan fatty acid ester as a surfactant, or both polyoxyethylene sorbitan fatty acid ester and lignin sulfonate, or polyoxyethylene sorbitan fatty acid ester and naphthalene sulfonate- Both of the formalin condensate and 0.1% of the surfactant are added per 1 part by weight of the pesticide active ingredient.
~ 3 parts by weight of the wettable powder, and the surface tension of the diluted solution obtained by dispersing the wettable powder in 10 times by weight water is in the range of 30-40 mN / m at 20 ° C. A wettable powder is provided in which the surfactant is added in an amount so as to be added.

In the wettable powder of the second aspect of the present invention, urea is inevitably included as a water-soluble extender to be blended, but it can be constructed in the same manner as in the first aspect of the present invention except for this point.

[0037]

The wettable powder according to the first and second aspects of the present invention is prepared by diluting it with a low volume of water to prepare a high concentration diluted solution. The solid suspension in the diluting solution is unlikely to form a precipitate even if left standing or left still after stirring once. Further, even if a precipitate is formed after being left for a long time, the precipitate does not become hard and a hard cake does not occur. Therefore, the precipitate can be easily redispersed by applying a weak stirring force to the high-concentration diluted solution containing the precipitate.
Therefore, it is possible to easily restart the seed spraying device and easily perform the spraying work without clogging the chemical liquid tank or the chemical liquid flow path of the spraying machine.

[0038]

The present invention will be described in more detail with reference to the following examples, which should not be construed as limiting the invention thereto. All "parts" below refer to parts by weight.

Example 1 20 parts of a raw product of pefrazoate, 5 parts of polyoxyethylene sorbitan fatty acid ester (manufactured by Kao Corporation), 20 parts of hydrous silicic acid and 55 parts of urea were mixed and finely pulverized with a hammer mill to obtain a wettable powder. Got

Example 2 Pephrazoate drug substance 20 parts, polyoxyethylene sorbitan fatty acid ester 3 parts, lignin sulfonate (trade name "Sun extract 252", manufactured by Nippon Paper Industries Co., Ltd .; "Sun extract" is a registered trademark) 2 parts, hydrous Silicic acid baked product 2
A wettable powder was obtained by mixing 0 parts and 55 parts of urea and finely pulverizing with a hammer mill.

Example 3 Pephrazoate drug substance 20 parts, polyoxyethylene sorbitan fatty acid ester 3 parts, lignin sulfonate 2
Parts, 20 parts of hydrous silicic acid, and 55 parts of dextrin (trade name "Paindex # 3", manufactured by Matsutani Chemical Industry Co., Ltd.) were mixed and finely pulverized with a hammer mill to obtain a wettable powder.

Example 4 Pefurazoate drug substance 20 parts, polyoxyethylene sorbitan fatty acid ester 3 parts, naphthalene sulfonate formalin condensate 4 parts, silicic acid anhydride 20 parts, urea 5
3 parts were mixed and finely ground with a hammer mill to obtain a wettable powder.

Example 5 20 parts of pefurazoate drug substance, 3 parts of polyoxyethylene sorbitan fatty acid ester, 4 parts of naphthalene sulfonate formalin condensate, 20 parts of hydrous silicic acid calcined product, and 53 parts of sucrose were mixed and finely ground with a hammer mill. To obtain a wettable powder.

Example 6 Pefurazoate drug substance 20 parts, alkylbenzene sulfonate 10 parts, silicic acid anhydride 20 parts, urea 20 parts,
30 parts of dextrin were mixed and finely pulverized with a hammer mill to obtain a wettable powder.

Example 7 Pephrazoate drug substance 20 parts, polyoxyethylene sorbitan fatty acid ester 5 parts, lignin sulfonate 5
Parts, 20 parts of hydrous silicic acid calcined product, 20 parts of urea and 30 parts of acid-decomposed starch were mixed and finely pulverized with a hammer mill to obtain a wettable powder.

Next, a test example for evaluating the surface tension of a water-diluted solution prepared from the wettable powder of the present invention and the redispersibility of a precipitate formed during water dilution will be shown.

Test Example 1 Surface tension measurement test 100 ml of distilled water at 20 ° C. was placed in an Erlenmeyer flask having a capacity of 200 ml, and 10 g of the wettable powder prepared according to Examples 1 to 7 was added and tightly stoppered. Then, it is turned over 20 times to disperse the wettable powder to obtain a diluent. The surface tension of the diluted solution is measured at 20 ° C. with a CBVP type surface tensiometer A3 (manufactured by Kyowa Interface Science Co., Ltd.). The results are shown in Table 1 below.

Test Example 2 Redispersibility Test 20 g of the wettable powder prepared according to Examples 1 to 7 was put in a 200 ml capacity cylinder with a stopper, and tap water was added to 200 ml.
To the volume. The cylinder was inverted 20 times and inverted to prepare a water diluted solution in which a wettable powder was dispersed in water. This is 15 ℃
Let stand for 48 hours in the constant temperature water bath. After standing, the cylinder is repeatedly inverted and the number of inversions required to completely redisperse the precipitate in water is determined. If the number of inversions is 20 or less, the wettable powder can be put into practical use without any trouble in the spraying work by the spraying device.

The results obtained are shown in Table 1.

Furthermore, for comparison, comparative wettable powders having the compositions shown in Table 1 below were prepared according to the method of Example 1, and the surface tension of the water-diluted solution of these comparative wettable powders was measured. The redispersibility of precipitation was measured in the same manner as in Test Examples 1 and 2. The results of these comparative examples are also shown in Table 1.

[0051]

[Table 1]

[0052]

[Continued Table 1]

Examples 8 to 11 In accordance with Example 1, the components shown in Table 2 below were mixed in the proportions shown in Table 2 and pulverized to prepare wettable powders. Further, a test for measuring the surface tension and the redispersibility of the precipitate was performed on the water-diluted solutions of the wettable powders according to the methods of Test Example 1 and Test Example 2.

For comparison, comparative wettable powders shown in Table 2 (Comparative Examples 11-12) were also prepared and tested in the same manner.

The results obtained are shown in Table 2.

[0056]

[Table 2]

Examples 12 to 15 In accordance with Example 1, the components shown in Table 3 below were mixed in the proportions shown in Table 2 and pulverized to prepare wettable powders. Further, a test for measuring the surface tension and the redispersibility of the precipitate was performed on the water-diluted solutions of the wettable powders according to the methods of Test Example 1 and Test Example 2.

Also, for comparison, the comparative wettable powders shown in Table 3 (Comparative Examples 13-17) were prepared and similarly tested.

The results obtained are shown in Table 3.

[0060]

[Table 3]

Example 16 In accordance with Example 1, the components shown in Table 4 below were mixed in the proportions shown in Table 2 and pulverized to prepare a wettable powder. Further, a test for measuring the surface tension and the redispersibility of the precipitate was performed on the water-diluted solutions of the wettable powders according to the methods of Test Example 1 and Test Example 2.

Also, for comparison, the comparative wettable powders shown in Table 4 (Comparative Examples 18-19) were prepared and similarly tested.

The obtained results are shown in Table 4.

[0064]

[Table 4]

Examples 17 to 19 In accordance with Example 1, the components shown in Table 5 below were mixed in the proportions shown in Table 2 and pulverized to prepare wettable powders. Further, a test for measuring the surface tension and the redispersibility of the precipitate was performed on the water-diluted solutions of the wettable powders according to the methods of Test Example 1 and Test Example 2.

Also, for comparison, the comparative wettable powders shown in Table 5 (Comparative Examples 20-23) were prepared and similarly tested.

The results obtained are shown in Table 5.

[0068]

[Table 5]

Example 20 Pephrazoate drug substance 20 parts, polyoxyethylene arylphenyl ether sulfate 3 parts, hydrous silicic acid 20 parts and urea 57 parts were mixed and finely ground with a hammer mill to obtain a wettable powder.

Example 21 20 parts of a raw product of pefrazoate, 3 parts of polyoxyethylene arylphenyl ether sulfate, 20 parts of hydrous silicic acid and 57 parts of sucrose were mixed and finely ground with a hammer mill to obtain a wettable powder.

Example 22 Pefurazoate drug substance 20 parts, polyethylene glycol polypropylene glycol block polymer 3 parts, silicic acid 20 parts, urea 25 parts and sucrose 32 parts were mixed and finely ground with a hammer mill to obtain a wettable powder. Obtained.

Example 23 Pephrazoate drug substance 20 parts, polyoxyethylene alkyl ether 3 parts, lignin sulfonate 2 parts, hydrous silicic acid calcined product 20 parts, urea 55 parts were mixed and pulverized with a hammer mill to obtain a wettable powder. Got

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[Procedure amendment]

[Submission date] April 28, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

In the wettable powder of the present invention, a water- soluble extender is used.
If it does not contain, when the wettable powder is diluted with water, pefurazoate in the diluted solution partly emulsifies pefurazoate by the surfactant, but the rest is dispersed in water in the state of being supported on fine silicic acid. It is thought that In this state, the solid particles which are emulsified and dispersed are fine, and when the diluent is left to stand, the solid particles precipitate and become a solid precipitate, that is, a hard cake, which is difficult to redisperse in water. By adding a water-soluble extender thereto, in the wettable powder of the present invention, the pephrazoate fine particles, the finely divided silicic acid, the nonionic surfactant and / or the anionic surfactant and the water-soluble extender do not interact with each other. This causes weak aggregation between the emulsified and dispersed particles, and the particles apparently become large, resulting in a precipitate in a weakly aggregated state and not becoming dense, resulting in a loosely aggregated precipitate, Therefore, it is considered that re-dispersion in the precipitate can be improved by allowing good re-dispersion in water by light stirring or shaking.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction content]

[0052]

[Continued Table 1]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiko Nabeya 656-4 Sanada, Hiratsuka City, Kanagawa Prefecture (72) Shinji Yonemura 1-8-11-205, Okada, Atsugi City, Kanagawa Prefecture

Claims (4)

[Claims] 1. Penta-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate as an agrochemical active ingredient and finely divided silicic acid as a carrier for supporting the same are used as an agrochemical active ingredient. It is contained in a ratio of 0.2 to 2 parts by weight of the carrier per 1 part by weight, and further contains urea or at least one selected from water-soluble sugars and modified starches as a water-soluble extender, and is also nonionic. A sprayable wettable powder for controlling seed diseases, which comprises at least one surfactant and / or anionic surfactant, and which is obtained by dispersing the wettable powder in 10 times by weight of water. The surface tension of the diluted solution at 20 ℃ is 2
A sprayable wettable powder for controlling seed diseases, which comprises adding a surfactant in an amount of 5 to 55 mN / m. 2. Penta-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate as an agrochemical active ingredient and finely divided silicic acid as a carrier for supporting the same are used as an agrochemical active ingredient. It is contained at a ratio of 0.2 to 2 parts by weight of the carrier per 1 part by weight, further contains urea and water-soluble saccharides or modified starches as a water-soluble extender, and contains a nonionic surfactant and / or anionic surfactant. A sprayable wettable powder containing at least one kind of ionic interface for controlling a seed disease, wherein the diluting solution obtained by dispersing the wettable powder in 10 times by weight of water has a surface tension of 20 ° C. A sprayable wettable powder for controlling seed diseases, which comprises adding a surfactant in an amount of 25 to 55 mN / m. 3. Pent-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate as an agrochemical active ingredient is contained in a proportion of 5 to 50% based on the weight of the wettable powder. Containing fine powder of hydrous or anhydrous silicic acid or calcium silicate as a carrier in a ratio of 0.5 to 1 part by weight per 1 part by weight of the agrochemical active ingredient,
Urea or sucrose or dextrin as a water-soluble bulking agent is contained in a ratio of 0.5 to 5 parts by weight per 1 part by weight of the agrochemical active ingredient, and polyoxyethylene sorbitan fatty acid ester or polyoxyethylene sorbitan fatty acid ester is used as a surfactant. And lignin sulfonate, or both polyoxyethylene sorbitan fatty acid ester and naphthalene sulfonate-formalin condensate, are added as surfactants per 1 part by weight of the agrochemical active ingredient.
It is a wettable powder containing 0.1 to 3 parts by weight, and the surface tension of the diluted solution obtained by dispersing the wettable powder in 10 times by weight water is in the range of 30 to 40 mN / m at 20 ° C. The wettable powder according to claim 1, wherein the surfactant is blended in such an amount that it is added. 4. Pent-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate as an agrochemical active ingredient is contained in a proportion of 5 to 50% based on the weight of the wettable powder. Containing 0.5 to 1 part by weight of fine powder of hydrous or anhydrous silicic acid or calcium silicate as a carrier per 1 part by weight of the agrochemical active ingredient, and urea and sucrose or dextrin or acid decomposition as a water-soluble bulking agent It contains starch or glucose in a proportion of 0.5 to 5 parts by weight in total of the water-soluble extender per 1 part by weight of the agrochemical active ingredient, and contains polyoxyethylene sorbitan fatty acid ester as a surfactant or polyoxyethylene sorbitan fatty acid. Both ester and lignin sulfonate, or polyoxyethylene sorbitan fatty acid ester and naphthalene A wettable powder containing both a sulfonate-formalin condensate in a proportion of 0.1 to 3 parts by weight of a surfactant per 1 part by weight of an agrochemical active ingredient, and the wettable powder in 10 parts by weight of water. The wettable powder according to claim 2, wherein the surfactant is blended in such an amount that the surface tension of the diluted solution obtained by dispersion is in the range of 30 to 40 mN / m at 20 ° C.