JPH08143403A - Granulated wettable powder of agrochemical - Google Patents

Abstract

PURPOSE: To provide a granulated wettable powder excellent in disintegrating and dispersing behaviors in water. CONSTITUTION: This agrochemical wettable powder comprises an agrochemical active ingredient and glassy powder of less than 100μm, particularly 10-30μm average particle size, prepared by crushing a natural glassy foam. The glassy foam powder originates from natural glassy substances such as obsidian, pearlite or pitchstone or volcanic ash, preferably from perlite and volcanic ash. These naturally occurring glassy substances are foamed with heat and the fired perlite or sirasu balloons are preferably used. The amount of the glassy powder is more than 2wt.%, preferably 5-80wt.%. When the preparation is desired to have a high hardness, a binder is admixed and the use of a saccharide as a binder advantageously increases the hardness of the preparation particles without adverse effect on their disintegration behavior in water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular pesticidal wettable powder (hereinafter referred to as "DF agent") having good disintegration in water and dispersibility.

[0002]

2. Description of the Related Art Conventionally, emulsions, flowables, wettable powders, etc. have been used as high-concentration pesticide formulations diluted with water and sprayed. However, there are problems with their dosage forms. For example, emulsions are flammable and (odor) because they use a large amount of organic solvent as a carrier.
There are safety issues such as toxicity and irritation, and flowable agents have issues such as dispersion particle aggregation and sedimentation after long-term storage.
Since a wettable powder is a finely powdered formulation, there are problems such as scattering of fine powder during manufacturing and preparation of a drug solution, and harshness of drug measurement. Therefore, in order to solve these problems, attempts have been made to granulate and granulate wettable powders.

However, the conventional DF agent is composed of an agricultural chemical active ingredient and an inorganic carrier or an organic carrier, and a small amount of a surfactant and a binder, so that the disintegrating property of particles when it is put in water is poor, or it disintegrates. There is a problem with the physical properties of the formulation such as poor dispersibility of the particles afterwards. Many studies have been made to solve these problems. For example, a pesticide active ingredient to which an anionic surfactant and bentonite are added and granulated (JP-A-62-263101), a micronized biocide and a specific dispersant are blended to obtain a specific average particle size and bulk density. A carrier having an agrochemical active ingredient which is solid at room temperature, a dispersant, a wetting agent, and a kaolin clay having a volume median diameter of a specific value or more (JP-A-3-2-3).
64502), polyethylene glycol, polyoxyethylene alkyl ether, and other water-soluble binders, which consist of agricultural bioactive substances, surfactants, and carriers (JP-A-4-273801), pesticide active ingredients, and diatomaceous earth. And preferably contains a surfactant (JP-A-6-128102).

Further, many inventions have been proposed regarding a preparation utilizing the floating property of a glassy porous material such as calcined perlite and shirasu balloon, and the adsorption-release property of a drug. A mixture of fertilizer or pesticide in the internal pores of calcined perlite made from obsidian or pinelite, and controlling elution of fertilizer and pesticide (JP-A-61-36187), a pesticide base and a carrier such as perlite, and Water-floating solid pesticide formulation containing a specific compound (Japanese Patent Laid-Open No. 25702/1989)
No.), a particle size of 600μ containing an agrochemical active ingredient containing an inorganic floating substance having an average particle size of 250 μm or less and a high boiling point solvent.
solid water-floating pesticide formulation having a particle size of m or less (JP-A-5-7820)
No. 4), a solid-molded water-floating pesticide formulation (Japanese Patent Laid-Open No. 58804/1993), which is composed of a pesticidal active ingredient, a glassy foam having an average particle size of 250 μm or less, and a water-soluble polymer.

[0005]

However, these DF preparations still have such problems that the particles do not easily disintegrate when the DF agent is put into water, and the dispersibility after disintegration is not sufficient. There is also a medicinal effect using a foam such as calcined perlite, which has an effect to be seen from the viewpoint of floating property on the water surface, but also has the same drawback. Therefore, in reality, it is desired to develop a DF agent that does not have such drawbacks.

[0006]

[Means for Solving the Problems] The present inventors have conducted extensive studies to solve these problems. As a result, the DF agent containing the vitreous powder having an average particle diameter of 5 to 100 μm obtained by crushing the pesticide active ingredient and the vitreous foam in the formulation composition unexpectedly disintegrated in water as compared with the conventional DF agent. It was found that the properties and dispersibility are improved and the above-mentioned problems can be solved, and the present invention was completed.

That is, the present invention has an average particle size of 5 to 1 obtained by pulverizing an agricultural chemical active ingredient and natural glassy foam.
It relates to a granular pesticide wettable powder containing a powder of 00 μm. Further, the present invention relates to a granular pesticide wettable powder containing an active ingredient of pesticide, powder having an average particle diameter of 5 to 100 μm obtained by crushing natural glassy foam, and a saccharide as a binder. As mentioned above, pesticide formulations using natural glassy foams are known, but these are mainly natural glassy foams that are porous and do not float when sprayed on the water surface of paddy fields. It is a good thing. Therefore, its characteristics are also a cause of causing defects such as not easily disintegrating when the formulation is put into water or poor dispersibility after disintegration.

On the other hand, according to the present invention, the natural glassy foam is pulverized into fine particles having an average particle size of 5 to 100 μm, particularly 10 to 30 μm, so that the individual particles have irregular shapes. We succeeded in providing a pesticide formulation that becomes fine pieces, keeps the density of particles at the time of granulation low, and has good disintegration and dispersibility. Therefore, in the present invention, the natural glassy foam is crushed to have an average particle size of 5 to 10
It is important to make powder of 0 μm, especially 10 to 30 μm. Furthermore, since the wettable powder has the above-mentioned inherent problems, the formulation of the present invention is granulated. The particle size is similar to that of conventional formulations used in the form of wettable powder, specifically 0.1-10 mm
The range is convenient. The pesticidal active ingredient used in the DF agent of the present invention may be any insecticide, fungicide, herbicide, plant growth regulator or any other compound commonly used as a pesticide, and one or more of these may be used in combination. May be. Examples of such agrochemical active ingredients include the following.

Insecticides CYAP, MPP, MEP, ECP, pirimiphos-methyl, etrimfos, diazinon, quinalphos, isoxathion, pyridafenthion, florpyrifos-methyl, chlorpyrifos, ESP, bamidthione, profenofos, marathon, PAP, dimethoate, formothion, thiomethone, ethylthiomethone, Hosalon, PM
P, DMTP, prothiophos, sulprophos, pyraclophos, DDVP, monocrotophos, BRP, CVMP,
Dimethylvinphos, CVP, propaphos, acephate, isofenphos, salicione, DEP, EPN, ethione, NAC, MTMC, MIPC, BPMC, PH
C, MPMC, XMC, etiophencarb, bendiocarb, pirimicarb, carbosulfan, benfuracarb, mesomel, thiodicarb, alanicarb, allethrin, resmethrin, permethrin, cypermethrin, cyhalothrin, cyfluthrin, fenpropatrine, tralomethrin, cycloprothrin, fenvale. Rate, flucitrinate, fluvalinate, etofenprox, cartap, thiocyclam, bensultap, diflubenzuron, teflubenzuron, chlorfluazuron, bufluofezin, phenoxycarb, chrysanthemum, delice, nicotine sulfate, machine oil, rapeseed, CP
CBS, quelsen, chlorbenzilate, phenisobromolate, tetradiphone, BPPS, quinoxaline, amitraz, benzoate, phenothiocarb, hexithiazox, fenbutazin oxide, dienochlor, fenpyroximate, fluazinam, pyridaben, clofentezine, DPC, polynaphthine complex, milbemectin, DCIP, Dazomet, Benzoepine, Methaldehyde, DCV, BT, etc.

Bactericide Inorganic copper, organic copper, copper nonylphenol sulfonate, DB
EDC, copper terephthalate, inorganic sulfur, zineb, maneb, manzeb, anbum, polycarbamate, organic nickel, propineb, diram, thiuram, thiadiazine,
Captan, sulfenic acid type, TPN, phthalide, I
BP, EDDP, tolclofos-methyl, pyrazophos, fosetyl, thiophanate-methyl, benomyl, carbendazole, thiabendazole, dietofencarb, fusalide, iprodione, vinclozolin, procymidone, fluorimido, oxycarboxyne, mepronil, flutolanil, teclophthalam, trichlamide, pencyclonil, metalacyl, metalacyl, methacraloxyl Triadimefon, bitertanol, microbutanyl, hexaconazole, propiconazole, triflumizole, prochloraz, pefurazoate, fenarimol, pyrifenox, triphorin, blasticidin S, kasugamycin, polyoxin, validamycin, streptomycin, oxytetracycline, mildiomycin, P
CNB, hydroxyisoxazole, ecromezole,
Chloroneb, metasulfocarb, methyl isothiocyanate, organic arsenic, zinc sulfate, dithianon, benzothiazole, quinoxaline, CNA, dimethyrimol, diclomedine, triazine, ferrimzone, fluazinam,
Probenazole, isoprothiolane, tricyclazole, pyroquilon, oxolinic acid, iminokudazine acetate, alginic acid, antibacterial, shiitake mycelium extract, koji mold product, Agrobacterium radiobactor, 4
-Chlorobenzyl-N- (2,4-dichlorophenyl)
-2- (1H-1,2,4-triazol-1-yl) thioacetimidate (imibenconazole) and the like.

Herbicides 2.4PA, MCP, MCPB, MCPP, triclopyr, phenothiol, clomeprop, naproanilide, phenoxapropethyl, fluazifop, quizalofop-ethyl, CNP, clomethoxil, bifenox, MCC, IPC, fenmedipham, MBP
MC, Bento Curve, Orthoven Curve, Esplocarb, Molnate, Dimepiperate, Piributicarb,
DCPA, alachlor, butachlor, pretilachlor, metolachlor, bromobutide, mefenacet, napropamide, diphenamide, propisamide, ashram, DMU, linuron, ciduron, dimuron, methyl daimuron, carbutyrate, isouron,
Thiazafluron, etidimurone, tebutyuron, bensulfuron-methyl, pyrazosulfuron-ethyl, flazasulfuron, CAT, atrazine, cimetrin, amethrin, promethrin, dimetamethrin, cyanadine, hexazinone, metribuzin, terbacil, bromacil, lenacyl, PAC, bentazone, oxadia , Pyrazoxifene, benzophenap, diquat, trifluralin, bethrosine, prodiamine, pendimethalin, MDBA, imazapyr, imazaquinammonium salt, dithiopyr, TCTP, TCA, DP
A, tetrapion, piperophos, amiprophos-methyl,
Butamiphos, SAP, ammonium fosamine, glyphosate, bialaphos, glufosinate, aixonyl,
DBN, DCBN, Aloxidim, Setoxydim, AC
N, chlorphthalim, maleic hydrazide, DSM
A, chlorate, cyanate, etc.

Plant growth regulators Ethephon, indole butyric acid, eticlozet, cloxifonac, dichlorprop, 1-naphthylacetamide, 4-CPA, benzylaminopurine, forchlorfenurone, choline, gibberellin and the like. The names of these pesticide active ingredients are “Pesticide Handbook 1992”.
It is a general name described in (Published by Japan Plant Protection Association).

The vitreous foam powder of the present invention is derived from natural glassy materials such as obsidian, pearlite, and pinelite, and shirasu, but pearlite and shirasu are preferred. For these glassy foam powders, use is made of calcined perlite and shirasu balloon obtained by heating a natural glassy material and foaming it by a usual method, or a commercially available product is crushed to have an average particle diameter of 100 μm by a usual crusher. It was done. If the average particle size of the vitreous foam powder exceeds 100 μm, the hardness of the particles after granulation becomes weak, and there is a problem that the powder becomes easy to be pulverized, and the disintegration property in water and the dispersibility become poor. If the average particle diameter is less than 5 μm, it is related to the granulating means, but generally the hardness of the granulated particles is high, but the disintegration property in water is poor. Therefore, the average particle size is 100μ
m or less, preferably 5 to 80 μm, more preferably 1
It should be 0 to 30 μm.

There is no problem even if one kind or two or more kinds of such glassy foam powders are used in combination, and it is desirable to add 2% by weight or more, preferably 5 to 80% by weight to the preparation. In the present invention, if necessary, generally used surfactants, binders, antiseptic / antifungal agents, stabilizers for agrochemical active ingredients, extenders such as inorganic carriers and organic carriers can be used. The amount of the pesticide active ingredient added is not particularly limited, but generally 0.01 to 90% by weight of the total amount of the preparation.
Is. Surfactants that can be used include nonionic surfactants, anionic surfactants, cationic surfactants and amphoteric surfactants. Examples of nonionic surfactants include polyoxyethylene alkyl ethers and poly Oxyethylene alkyl aryl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan alkylate, polyoxyethylene phenyl ether polymer,
There are polyoxyethylene alkylene aryl phenyl ether, polyoxyethylene alkylene glycol, polyoxyethylene, polyoxypropylene block polymer and the like. Examples of the anionic surfactant include lignin sulfonate, alkylaryl sulfonate and dialkyl sulfo. Examples include succinate, polyoxyethylene alkyl aryl ether sulfate, alkyl naphthalene sulfonate, polyoxyethylene styryl phenyl ether sulfate. Examples of cationic surfactants and amphoteric surfactants include alkylamine salts, quaternary ammonium salts, alkyl betaines, and amine oxides. The amount added is 0.1 in the formulation due to its effect and economy.
-30% by weight is desirable.

In the present invention, a binder is used when hardness of the preparation is desired. The binder may be any conventionally used one, for example, natural products derived from cellulose, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, starch, carboxymethyl starch, pullulan, sodium alginate. , Ammonium alginate, dextran, mannan, pectin, tragacanth gum, mannitol, sorbitol, propylene glycol alginate ester, guar gum, locust bean gum, gum arabic, xanthan gum, and other sugar-based substances, gelatin, casein, and other protein-based substances Yes,
Examples of synthetic substances include polyvinyl alcohol, polyethylene oxide, polyethylene glycol, ethylene / propylene block polymers, sodium polyacrylate, and polyvinylpyrrolidone.

In the present invention, dextrin or various invert sugars or isomerized sugars obtained by hydrolysis of starch, specifically, glucose, fructose, maltose, sucrose, and further monosaccharides such as lactose, disaccharides, Sugars of oligosaccharides can be used. Such saccharides have the advantage of surprisingly not impairing the disintegration property in water, although they have the effect of increasing the hardness of the formulation particles. The type and amount of the binder should be determined in consideration of the desired disintegration property of the preparation of the present invention.
0 wt% is desirable.

Examples of the antiseptic / antifungal agents that can be used include sorbic acid, potassium sorbate, parachloro-metaxylenol, butyl paraoxybenzoate, and the like. Antioxidants, ultraviolet ray inhibitors, and pesticide active ingredient stabilizers,
A crystal precipitation inhibitor or the like may be added if necessary. Examples of possible inorganic carriers for use in the present invention include clay, bentonite, talc, calcium carbonate, sodium carbonate,
There are dichrite, sericite, acid clay, silica stone, diatomaceous earth, pumice stone, zeolite, vermiculite, white carbon and the like, and examples of the organic carrier include sawdust, straw, pulp and chaff.

The pesticidal granular wettable powder of the present invention can be easily prepared by the method described below. A vitreous powder having an average particle size of 100 μm or less obtained by pulverizing a vitreous foam with an agrochemical active ingredient, and if necessary, a surfactant, a binder,
An inorganic or organic carrier, an antiseptic / antifungal agent, a pesticide active ingredient stabilizer and the like are mixed, hydro-kneaded, extruded, granulated using a granulator, dried and sized. In consideration of handling convenience and disintegration property of the preparation, it is generally preferable to appropriately adjust the particle size within a range of 0.1 to 10 mm. Further, while adding water to the powder mixture, it may be granulated by a tumbling granulator, dried and sized. Further, the powder mixture may be dispersed in water to be produced by a spray granulator, or a fluidized bed granulator for spraying a binder, an aqueous solution or an active ingredient while granulating the powder mixture. There is no problem even if manufactured by.

Action In the present invention, the agrochemical active ingredient exhibits pest control activity and herbicidal activity on agricultural crops, and the vitreous powder has the action of improving disintegration and dispersibility of the granular wettable powder in water.

[0020]

EXAMPLES Next, the present invention will be described more specifically with reference to Examples and Comparative Examples (Nos. Shown in Examples and Comparative Examples).
Corresponds to No. in the table). The average particle size is measured by a Coulter counter (Coulter Electronics Inc.) particle size distribution measuring device and is determined as the particle size in volume of the particles. All parts are parts by weight.

Examples 1 to 4 1.4 parts of kasugamycin, 20 parts of fusaride, 10 parts of sodium lignin sulfonate, 1 part of polyoxyethylene nonylphenyl ether, and pearlite derived from pearlite (trade name "Topco of Showa Kagaku Co., Ltd." Perlite ”) vitreous powder having the average particle diameter and amount shown in Table 1, silica stone clay 2
After mixing 7.6 parts with a hammer mill (manufactured by Fuji Paudal Co., Ltd.), 17 parts of water was added to 100 parts of this mixture,
Knead and mix with a twin-arm kneader (manufactured by Fuji Paudal Co., Ltd.). Next, granulate with an extrusion granulator (manufactured by Nippon Pharmaceutical Co., Ltd.) equipped with a screen of 0.6 mm diameter, and further fluidized bed dryer.
(Made by Fuji Paudal Co., Ltd., dried and sieved to give a particle size of 0.35
A DF agent of ~ 1.0 mm was obtained.

Examples 5 to 6 MEP 40 parts, white carbon 30 parts, polyoxyethylene styryl phenyl ether 5 parts, polyvinyl alcohol 0.5 part, pearlite derived from perlite (Showa Kagaku)
The glassy powder (average particle size 14 μm) in the amount shown in Table 1 under the trade name “TOPCOPPERLITE” of Co., Ltd.) is mixed with a hammer mill, and 10 parts of water is added to 100 parts of this mixture. Knead and mix with a kneader. Next, the mixture was granulated by an extrusion granulator equipped with a screen having a diameter of 0.6 mm, dried by a fluidized bed drier, and then sieved to obtain a DF agent having a particle diameter of 0.35-1.0 mm.

Examples 7-9 50 parts acephate, 0.5 parts polyvinyl alcohol,
Pearlite derived perlite (Showa Kagaku Co., Ltd. trade name "Topcoperlite") glassy powder having the average particle size and amount described in Table 1 was mixed by a hammer mill, and this mixture 1
12 parts of water is added to 00 parts and kneaded and mixed with a twin-arm kneader. Next, granulate with an extrusion granulator equipped with a 0.6 mm diameter screen, dry with a fluidized bed drier, and then sieve to obtain a particle size of 0.6.
35 to 1.0 mm of DF agent was obtained.

Examples 10 to 12 Fthalide 20 parts, polyoxyethylene nonylphenyl ether 0.5 part, sodium alkylnaphthalene sulfonate 2 parts, sodium polyacrylate 0.1 part, Shirasu balloon (product of Idiji Kasei Co., Ltd.) The glassy powder having the average particle size and amount shown in Table 1 of "Winlite") is mixed by a hammer mill, and 15 parts of water is added to 100 parts of this mixture and kneaded and mixed by a double-arm kneader. Next, granulate with an extrusion granulator equipped with a screen of 0.6 mm diameter, dry with a fluidized bed drier and then sieve to obtain a particle size of 0.35-1.0.
mm DF agent was obtained.

Examples 13 to 15 NAC 80 parts, polyoxyethylene nonylphenyl ether 0.5 parts, sodium lignin sulfonate 14.5
Part, 5 parts of vitreous powder having an average particle size of 14 μm described in Table 1 of Shirasu Balloon (trade name “Winlite” of Idiji Kasei Co., Ltd.) were mixed with a hammer mill, and the mixture 10
Add 6 parts of water to 0 part and knead and mix with a twin-arm kneader. Next, granulate with an extrusion granulator equipped with a 0.6 mm diameter screen, dry with a fluidized bed drier, and then sieve to obtain a particle size of 0.6.
35 to 1.0 mm of DF agent was obtained.

Examples 16 to 18 30 parts of imibenconazole, 1 part of polyoxyethylene nonylphenyl ether, 5 parts of sodium lignin sulfonate, 0.1 part of polyvinyl alcohol, vitreous powder having the average particle size and amount shown in Table 1 , Wax stone clay 33.9
Parts are mixed with a hammer mill, 10 parts of water is added to 100 parts of this mixture, and they are kneaded and mixed with a double-arm kneader. Next, granulate with an extrusion granulator equipped with a 0.6 mm diameter screen, dry with a fluidized bed drier, and then sieve to obtain a particle size of 0.35-1.
0 mm of DF agent was obtained.

Comparative Examples 19 to 21 correspond to Example 1 and Comparative Example 2
2 to Example 5, Comparative Examples 23 to 24 to Example 7, Comparative Examples 25 to 26 to Example 10, and Comparative Example 27 to Example 13.
In Comparative Example 28, the average particle size and amount of the glassy powder were prepared according to Example 16 as shown in Table 1.

The dispersibility in water and the disintegration property shown in Table 1 are based on the following tests and evaluations. Test 1. Dispersibility test in water In a cylinder with a cap of 100 ml, 3 ° hard water at 20 ° C 9
Add 9.9 ml and add 0.1 g of DF agent. At this time, the manner of disintegration of the particles in water was observed and evaluated in the following three stages. (Evaluation Criteria) A: Disintegration begins immediately after charging and disintegrates to an initial particle size of 30% or less before reaching the bottom of the cylinder. B: The particles disintegrate to 30 to 70% of the initial particle size before reaching the bottom of the cylinder. C: The grains reach the bottom of the cylinder with a size of 70% or more of the initial grain size.

Test 2. Disintegration test method In a cylinder with a cap of 100 ml capacity, 3 ° hard water at 20 ° C 9
9.9 ml was added, 0.1 g of DF agent was added, and 1 minute after reaching the bottom of the cylinder, the cylinder was tumbled, and the number of tumbles until all the particles collapsed was measured.

[0030]

[Table 1]

As mentioned above, sugars as thickeners can unexpectedly increase the hardness of the formulation. Then, it demonstrates concretely by an Example. The hardness test method is as follows. Dust was removed from the sample with a standard sieve of 350 μm, and 100 g of this was placed in a porcelain pot with an inside diameter of 10 cm and a depth of 10 cm containing 3 porcelain balls (35 g), and 1 minute for 1 minute.
Rotate for 10 minutes at a speed of 00 revolutions. Then standard sieve 35
The amount of passage through the sieve is measured at 0 μm, and the disintegration rate (%) is determined to obtain the hardness.

[0032]

[Equation 1] The results are shown in Table 2.

Examples 19-24 XMC 50 parts, polyoxyethylene nonyl phenyl ether 1 part, sodium dodecylbenzene sulfonate 3
Part and glassy powder perlite having the average particle size and amount shown in Table 2 (trade name "Topco perlite" of Showa Kagaku Co., Ltd.)
And sugar for hammer mill (Fuji Paudal Co., Ltd.)
After mixing in, 100 parts of this mixture was added with 17 parts of water and kneaded and mixed with a double-arm kneader (manufactured by Fuji Paudal Co., Ltd.). Next, granulate with an extrusion granulator (manufactured by Nippon Pharmaceutical Co., Ltd.) equipped with a screen having a diameter of 0.6 mm, further dry with a fluidized bed dryer (manufactured by Fuji Paudal Co., Ltd.), and then sift it to obtain a particle size. A DF agent of 0.35 to 1.0 mm was obtained.

Examples 25 to 27 25 parts of marathon, 20 parts of white carbon, 5 parts of polyoxyethylene styryl phenyl ether, 3 parts of sodium alkylnaphthalene sulfonate and glass powder perlite having the average particle size and amount shown in Table 2 (Showa era) (Chemical Co., Ltd. trade name "Topcoperlite") and sugar and 32 parts of clay are mixed with a hammer mill, and 12 parts of water is added to 100 parts of this mixture and kneaded and mixed with a double-arm kneader. Then 0.
Granulate with an extrusion granulator equipped with a 6 mm diameter screen,
After being dried with a fluidized bed drier, it was sieved to obtain a DF agent having a particle size of 0.35 to 1.0 mm.

Examples 28 to 30 Kasugamycin 1.37 parts, fthalide 15 parts, etofenprox 10 parts, white carbon 10 parts, polyoxyethylene nonylphenyl ether 4 parts, sodium lignin sulfonate 10 parts Glass powder of Shirasu balloon (trade name "Winlite" manufactured by Idiji Kasei Co., Ltd.) having an average particle size and amount, sugar and the amount shown in Table 2 and 9.53 parts of silica stone were mixed by a hammer mill, and then this mixture was mixed. To 100 parts of water, 14 parts of water was added, and the mixture was kneaded and mixed with a double-arm kneader, then granulated by an extrusion granulator equipped with a 0.6 mm screen, dried and sieved to a particle size of 0.35 to 1.0 mm.
A DF agent of

Examples 31 to 34 Kasugamycin 5.7 parts, basic copper chloride 75.6 parts (45 parts as copper), β-naphthalenesulfonic acid formalin condensate sodium salt 6 parts, average particle size shown in Table 2 And amount of pearlite-derived perlite (Showa Kagaku's trade name "Topcoperlite") vitreous powder (average particle size 1
(0.20 μm) and the amounts and types of sugars shown in Table 2 are mixed by a hammer mill, 8 parts of water is added to 100 parts of this mixture, and the mixture is kneaded and mixed by a double-arm kneader. Then 0.
Granulate with an extrusion granulator equipped with a 6 mm screen, dry with a fluidized bed drier, and then screen to a particle size of 0.35-1.0.
mm DF agent was obtained.

Examples 35-38 Mesomil 45 parts, sodium lignin sulfonate 10
Part, the glassy powder (average particle size 20.25 μm) of balloons derived from Shirasu (trade name of Idishi Kasei Co., Ltd. “Winlite”) having the average particle size and amount shown in Table 2 and sugar were used in a hammer mill. After mixing, 11 parts of water is added to 100 parts of this mixture, and they are kneaded and mixed with a double-arm kneader. Next, granulate with an extrusion granulator equipped with a 0.6 mm screen, dry with a fluidized bed drier, and sieve to obtain a particle size of 0.35-1.
0 mm of DF agent was obtained.

Examples 39-41 30 parts of imibenconazole, 1 part of polyoxyethylene nonylphenyl ether, 5 parts of naphthalenesulfonic acid formalin condensate, 8 parts of pullulan, vitreous powder having the average particle size and amount shown in Table 2 , 26 parts of wax stone clay were mixed with a hammer mill, and 100 parts of this mixture was mixed with 12 parts of water.
Parts, and knead and mix with a twin-arm kneader. Then 0.6m
m Extruded granulator equipped with a screen, dried with a fluidized bed dryer, and then sieved to obtain DF with a particle size of 0.35-1.0 mm.
I got an agent.

Comparative Examples 42 to 44 are Example 19, Comparative Examples 45 to 47 are Example 25, Comparative Examples 48 to 50 are Example 28, Comparative Example 51 is Example 35, and Comparative Examples 52 to 53.
According to Example 39, the average particle size and amount of the glassy powder and the amount of saccharide were prepared as shown in Table 2.

[0040]

[Table 2]

[0041]

[Table 3]

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Claims (6)

[Claims] 1. A granular pesticidal wettable powder containing a pesticidal active ingredient and a glassy powder having an average particle size of 100 μm or less obtained by pulverizing a natural glassy foam. 2. The average particle size of the natural glassy powder is 5 to 8
The granular pesticide wettable powder according to claim 1, which has a particle size of 0 μm. 3. The natural glassy powder is a powder of calcined pearlite or shirasu balloon and has an average particle size of 10 to 3.
The granular pesticide wettable powder according to claim 1, which has a particle size of 0 μm. 4. The particle size of the granular pesticide wettable powder is 0.1 to 10 mm.
The granular pesticide wettable powder according to claim 1. 5. A granular pesticidal wettable powder containing a pesticidal active ingredient, a glassy powder having an average particle size of 100 μm or less obtained by crushing natural glassy foam, and a binder. 6. The granular pesticide wettable powder according to claim 5, wherein the binder is a saccharide.