JPH0720842B2 - Granular biocide composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a granular biocide composition, and more specifically, it contains a micronized biocide having a significantly enhanced bioefficiency and is used for storage and transportation of products. The present invention relates to a granular biocide composition which is advantageous in cost, easy to suspend, and free from environmental pollution.

[Conventional technology and its problems]

Biocides such as insecticides, bactericides, herbicides and acaricides are practically insoluble in water and have been put to practical use as fluid suspensions containing water as a continuous phase.

The fluid suspension is a storage surface of the product, as compared with a liquefied emulsion obtained by dissolving a biocide in an organic solvent such as xylene or kerosene.
It is a dosage form that is advantageous in terms of cost, environmental pollution, and occurrence of chemical damage to crops, and can be made into a liquid even when there is no suitable organic solvent, and is suitable for spraying in the air.

Thus, the fluid suspension has an excellent aspect as a biocide dosage form, and although various improvements have been studied, it also has drawbacks such as caking and thickening when stored for a long period of time. , I wasn't quite satisfied with it.

[Means for solving problems]

The present inventor, as a result of repeated earnest studies in such an actual situation, if the dispersion liquid of biocidal substance is stirred with a rigid medium having a particle size of 0.5 mm or less, particles having a particle size of 0.5 μ or less are 50 w.
A micronized biocidal drug substance of t% or more can be obtained, and if the micronized biocidal drug substance thus obtained is used as an active ingredient, the biological effect is high and the bottom hard surface due to natural sedimentation of the biocidal drug substance is high. We found that a suspension-type pesticide formulation excellent in long-term stability without caking or thickening can be obtained, and have already proposed.

Since the above suspension formulation is not necessarily advantageous in terms of storage and transportation, further studies on pulverization have been carried out this time, and as a result, by making the micronized biocide into a specific particle size and bulk density together with a specific dispersant, The present invention has been completed by finding that environmental pollution due to scattering of powder during handling can be suppressed, storage and transportation are easy and advantageous, and that a suspension-like composition can be easily obtained when put in water.

That is, the present invention uses 50 wt% of particles having a particle size of 0.5 μ or less.
A granular biocide composition containing the above micronized biocide and one or more dispersants selected from the following (1) to (4), having an average particle size of 0.1 to 1.0 mm, and The present invention provides a granular biocide composition having a bulk density of 0.20 to 0.6 g / cm ³ .

(1) Water-soluble or water-dispersible polymer containing, as an essential component, one or more selected from the group of monomers consisting of unsaturated carboxylic acids and their derivatives (2) Styrene sulfonate polymer ( 3) A formalin condensate of a sulfonate of a polycyclic aromatic compound which may have a hydrocarbon group as a substituent or a salt thereof (4) Alkali metal phosphate: The micronized biocide of the present invention is 0.5 μm or less. Particles having a particle size of 50 wt% or more, more preferably particles having a particle size of 0.5 μ or less and having an average particle size of 0.5 μ or less, especially 70 μ% or less It is preferable that the average particle size is 0.4 μ or less.

The biocide according to the present invention includes any biocide that is insoluble in water and is solid or paste at room temperature regardless of its type. And, any of the biocides can obtain an excellent biological effect which has not been heretofore conceivable by the microparticulation of the present invention. The biocide can also be used in combination of two or more biocides having different structures.

Biocides that are insoluble in water and solid or pasty at room temperature include bactericides such as copper, organotin, and organic arsenic, as well as sulfur (sulfur), daicene (zincized ethylenebis (dithiocarbamate)), and thiuram. (Bis (dimethylthiocarbamyl) disulfite) and other organic sulfur agents; daconyl (tetrachloroisophthalonitrile), labside (4,5,6,7-tetrachlorophthalide) and other organic chlorine agents; other cabutane ( N- (Trichloromethylthio)
-4-cyclohexene-1,2-dicarboximide),
Diformane (N- (1,1,2,2-tetrachloroethylthio) -4-cyclohexene-1,2-dicarboximide), acriside (2-secondary-butyl-4,6-)
Dinitrophenyl-3-methyl crotonate), Topzin M (dimethyl 4,4'-o-phenylene-3,3'-dithiodialophanate), Benrate (methyl-1-
(Butylcarbamoyl) -2-benzimidazole carbamate, Takegaren (3-hydroxy-5-methylisoxazole), etc .; for herbicides nip (2,4-dichlorophenyl-p-nitrophenyl ether), MO (p-
Diphenyl ether herbicides such as nitrophenyl-2,4,6-trichlorophenyl ether); stam (3 ', 4'-dichloropropionanilide), dimid (N, N-dimethyl-2,2-diphenylacetamide), etc. Acid amide herbicides; carbamate herbicides such as suep (methyl-3,4-dichlorocarbanilate); Carmex D (3- (3,4-dichlorophenyl) -1,1-
Urea herbicides such as diethylurea); Simazine (2-
Chlor-4,6-bis (ethylamino) -1,3,5-triazine), gesaprim (2-chromium-4-ethylamino-6)
-Isopropylamino-1,3,5-triazine) and other triazine herbicides; insecticides include organic chlorine such as DDT (1,1,1-trichloro-2,2-bis (para-chlorophenyl) -ethane) Aromatic pesticides such as Kayaace (para-dimethylsulfamylphenyldiethylphosphorothionate) and guardside (2-chloro-1- (2,4,5-trichlorophenyl) -vinyldimethylphosphate) Organophosphorus insecticides that have; Denabone (1-naphthyl-methylcarbamate), Tumaside (m-trimethylcarbamate), Macvar (3,5-xylylmethylcarbamate), Mipsin (o-cumenylmethylcarbamate), Sunside (o -Carbamate insecticides such as isopropoxyphenylmethyl carbamate) and other meta-aldehydes (acetaldehyde Body), lannate (S-methyl-N- (methylcarbamyloxy) thioacetimide), etc .; as acaricide, sappiran (p-chlorophenyl p-chlorobenzene sulfonate), tedeon (p-chlorophenyl-2,4,5). -Trichlorophenyl sulfone), quelsen (2,2,2-trichloro-1,1-bis (p-chlorophenyl) ethanol), omite (2-
(P-tert-butylphenoxy) cyclohexylpropynyl sulfite), plectran (tricyclohexyl hydroxytin) and the like.

The micronized biocide of the present invention has a particle size of 0.5 m of the biocide dispersion.
Manufactured by stirring with rigid media of m or less.

The biocide used as a raw material is a commercially available powder dispersed in water, but may be a commercially available dispersion. The concentration of the dispersion liquid is preferably in the range of 5 to 70 wt% of the biocide, and considering the production efficiency, the high concentration is particularly preferable.

Further, as the medium, those having a particle size of 0.5 mm or less, particularly 0.05 to 0.5 mm are preferable. A rigid body such as Ottawa sand, glass, alumina or zircon can be used as the material of this medium, but glass is preferable.

As a device for agitating a biocide and a medium to make fine particles, a sand mill, a sand grinder, etc. are known, but the sand mill and sand grinder used in the present invention may be generally known ones, both vertical and horizontal. Can be used. Further, the type of disc that is normally used can also be used.

The temperature for forming fine particles is preferably 5 to 40 ° C. When the temperature exceeds 40 ° C, it takes a long time to make the particles fine and it becomes difficult to make the particles fine, which is not preferable.

The mixing ratio of the media and the biocide for atomization is
Volume ratio is in the range of 40 / 60-80 / 20, preferably 60/40
~ 70/30.

The micronized biocide of the present invention is obtained by micronizing it with a sand mill, separating the medium and the biocide dispersion by pressure filtration or centrifugation, and further washing the medium with water if necessary.

The dispersant used in the present invention is a compound shown in the following (1) to (4), and of course, it does not matter even if it is added during pulverization.
These dispersants may be used alone or in combination of two or more.

(1) A water-soluble or water-dispersible polymer containing, as an essential component, one or more selected from the group of monomers consisting of unsaturated carboxylic acids and their derivatives.

Examples of the monomer used for producing the polymer (1) include unsaturated monocarboxylic acids such as acrylic acid and methacrylic acid,
Unsaturated dicarboxylic acids such as maleic acid, derivatives thereof such as alkyl esters of the above acids (such as methyl esters), alkali metal salts (such as soda salts), ammonium salts and organic amine salts (such as triethanolamine salts),
There are mixtures of these. In addition to these monomers, vinyl acetate, isobutylene, diisobutylene, as a copolymerization component,
Copolymerizable monomers such as styrene can also be added.

The method of polymerizing these monomers is a conventionally known method. The ratio of the monomer components and the degree of polymerization of the polymer are not particularly limited, but the polymer needs to be at least water-soluble or water-dispersible.

Specific examples include acrylic acid polymer, methacrylic acid polymer, acrylic acid and methacrylic acid copolymer, acrylic acid and acrylic acid methyl ester copolymer, acrylic acid and vinyl acetate copolymer. Examples thereof include polymers, copolymers of acrylic acid and maleic acid, copolymers of maleic acid and isobutylene, copolymers of maleic acid and styrene, and salts of these with alkali metals, ammonia and organic ammine. Two or more kinds of these polymers can be used.

(2) Polymer of styrene sulfonate The polymer of styrene sulfonate can be easily produced by polymerizing styrene sulfonate or sulfonation of polystyrene. The styrene sulfonate polymer has a skeleton represented by the following formula.

The molecular weight is 1000 or more, preferably 10,000 to 3,000,000. M
Means an alkali metal salt such as Li, Na, K or NH ₃ , an alkylamine, an alkanolamine and the like.

The styrene sulfonate polymer may be a copolymer of styrene sulfonate and another monomer. Such a copolymer can be easily produced by copolymerizing styrene sulfonate with another monomer or by sulfonation of a copolymer of styrene and another monomer. In the case of copolymerization, it may be in a range that does not impair the effects of the present invention. As the monomer of the copolymerization partner, alkyl acrylate, alkyl methacrylate, vinyl alkyl ether, vinyl acetate, ethylene, propylene, butylene,
Hydrophobic monomers such as butadiene, diisobutylene, vinyl chloride, vinylidene chloride, acrylonitrile and styrene,
And acrylic acid, methacrylic acid, maleic acid, fumaric acid, maleic anhydride, vinyl alcohol, acrylamide, methacrylamide, diacetone acrylamide, N
-A hydrophilic monomer such as vinylpyrrolidone, 2-acrylamido-2-methylpropanesulfonic acid, or methallylsulfonic acid is used.

(3) Formalin condensate of sulfonated polycyclic aromatic compound which may have a hydrocarbon group as a substituent or a salt thereof, such as petroleum sulfonic acid derivative, lignin sulfonic acid derivative, naphthalene sulfonic acid derivative. It is a formalin condensate.

The compound (3) according to the present invention is, for example, naphthalene,
It can be obtained by sulfonation of an alkyl-substituted naphthalene, anthracene, an alkyl-substituted anthracene, lignin, or one having an aromatic ring in a petroleum residue by a general method, followed by a salt-forming reaction and further formalin condensation. In this case, the condensation degree is preferably 1.2 to 30, and more preferably 1.2 to 10. Here, when the condensation degree is 1.2 or less, the effect of condensation is small, and when it exceeds 30,
Since it has a high molecular weight, it causes a problem in practical use due to its solubility and the like.

As the polycyclic aromatic compound to be used, various ones can be used, but it is preferable to use lignin, naphthalene or alkylnaphthalene having 1 to 6 carbon atoms, and of course, a mixture thereof. .

Examples of the salt include alkali metals such as sodium and potassium, alkaline earth metals such as calcium, amine, ammonium salts and the like.

(4) Examples of the alkali metal phosphate include sodium tripolyphosphate, potassium pyrophosphate, sodium pyrophosphate, sodium hexametaphosphate, monobasic sodium phosphate, dibasic sodium phosphate, and tribasic sodium phosphate. You may use 1 or more types from the inside.

The ratio of the micronized biocide and the dispersant in the composition of the present invention is
Dispersant / micronized biocide (weight ratio) = 1/1 to 1/50, preferably 1/6 to 1/40.

The granular biocide composition of the present invention can be easily produced by spray drying an aqueous slurry containing the above micronized biocide and dispersant.

The conditions for spray drying include a spray nozzle diameter of 0.5 to 4.0 mm,
Preferably 0.6 to 3.8 mm, spraying pressure 5 to 250 kg / cm ² , preferably 6 to 180 kg / cm ² , hot air inlet temperature 150 ° C to 300 ° C, preferably 170 to 280 ° C, exhaust air temperature 60 to 120 ° C, preferably Is 7
The condition is 0 to 110 ° C.

If necessary, granulate the spray-dried product with minerals,
The target particle size can also be obtained.

In carrying out the present invention, in addition to the micronized biocide which is an essential component and the dispersant selected from the above (1) to (4),
Other dispersants, water-soluble thickeners, anti-foaming agents, anti-decomposition agents, anti-agglomeration agents, inorganic mineral substances and the like other than the above may be added as necessary.

As the dispersant other than the dispersants selected from the above (1) to (4), a nonionic surfactant and / or an anionic surfactant is used. Examples of such nonionic surfactants and / or anionic surfactants include polyoxyethylene (hereinafter referred to as POE) alkyl (having 6 carbon atoms).
~ 22) Ether, POE alkyl (C4-18) phenol ether, polyoxypropylene polyoxyethylene (block or random) alkyl ether, POE phenylphenol ether, POE styrenated phenol ether, POE tribenzylphenol ether, etc. Ionic surfactant, lignin sulfonate, alkylbenzene sulfonate, alkyl sulfonate, POE alkyl sulfonate, POE alkyl phenyl ether sulfonate, POE alkyl phenyl ether phosphate ester salt, POE phenyl phenol ether sulfonate , POE phenylphenol ether phosphate salt, naphthalene sulfonate, naphthalene sulfonic acid formalin condensate, POE tribenzylphenol ether sulfonate, POE tribenzyl phenylpheno And anionic surfactants such as oleyl ether phosphate salts. These can be used alone or in combination. Its content in the composition is 0 to 20 weight percent, preferably 1 to 10 weight percent.

As the water-soluble thickener, natural, semi-synthetic and synthetic water-soluble thickeners can be used, natural mucilage, zansan gum derived from microorganisms, Zanflow, plant-derived pectin,
Gum arabic, guar gum, etc. are semi-synthetic mucilages such as methylated products of cellulose or starch derivatives, carboxyalkylated products, hydroxyalkylated products (including methylcellulose, carboxymethylcellulose, hydroxymethylcellulose, etc.), and synthetic mucilages are made of polyacrylic acid. Specific examples include salts, polymaleic acid salts, and polyvinylpyrrolidone. The water-soluble thickener is
The composition is incorporated in an amount of about 0 to 3.0% by weight, preferably about 0.05 to 0.5% by weight.

Anti-foaming agents may optionally be included up to about 2% by weight to prevent foaming during formulation, and degradants may be included up to about 7% by weight to prevent decomposition of organophosphorus biocides, especially during storage. Is preferred. The anti-foaming agent is not particularly limited, and any of them can be used. Specific examples thereof include polypropylene glycol and silicone oil.
Examples of the decomposition inhibitor include epichlorohydrin, phenylglycidyl ether, and allylglycidyl ether. If desired, a solid biocide anti-aggregation agent (e.g., polyoxyethylene-polyoxypropylene block polymer), an anti-drift agent (e.g., sorbitol), etc. may be added as long as the effect of the present invention is not impaired. .

Specific examples of the mineral powder include wax stone, talc, kaolin, calcium carbonate, bentonite, silica powder, limestone powder, acid clay, diatomaceous earth powder, gypsum, pumice powder, shellfish powder, mica powder, colloidal property. Examples include hydrous sodium silicate.

When the mineral powder is blended, the proportion of the mineral powder in the wettable powder is 0 to 60% by weight, preferably 2 to 50% by weight.

Summarizing the above, one example of the granular biocide composition of the present invention is as follows.

(A) Micronized biocide 30-95% by weight (B) Dispersant of (1)-(4) 2-50 〃 (C) Surfactant 0-20 〃 (D) Water-soluble thickener 0-3 〃 (E) Anti-foaming agent 0 to 2 〃 (F) Decomposition inhibitor 0 to 7 〃 [Effect of the invention] Since the granular biocide composition of the present invention is granular, storage,
It has excellent stability, is easy to transport, and does not scatter during handling. Since the biocide is made into fine particles and contains a dispersant and has a specific bulk density, it has good dispersibility when placed in water, and a stable suspension can be easily obtained. Further, since the biocide is finely divided, the biological effect is remarkably enhanced as compared with the conventional biocide having a large particle size.

〔Example〕

Next, the present invention will be described with reference to Test Examples, Examples and Comparative Examples, but the present invention is not limited to these Examples.

<Test Example 1> Preparation Example 1 60 parts by weight of daconyl powder, formula (The molecular weight of the above formula compound is about 350,000) 4 parts by weight of the dispersant, 55 parts by weight of water and 0.1 to 0.2 mm
140 parts by weight of glass beads (media) are mixed (media / dispersion liquid volume ratio = 50/50), and the disk is rotated for 12 hours in a sand grinder. The temperature in the sand grinder is 20-25 ° C. Further, after microparticulation, this is filtered under pressure to obtain about 100 parts by weight of the microparticulated Daconyl dispersion. If the medium is washed twice with 70 parts by weight of water, 97% by weight of daconyl can be recovered.

As shown in Table 1, this finely divided daconyl is 0.5
Particles having a particle size of μ or less consist of a particle size distribution of 72% by weight.

Preparation Example 2 46 parts by weight of Labside (bactericide) powder, formula (The molecular weight of the above formula compound is 680,000) 4.5 parts by weight of the water-soluble copolymer salt, 63 parts by weight of water and 187 parts by weight of 0.1-0.2 mm glass beads (media) are mixed (media / dispersion) Liquid volume ratio = 63/67) and rotate the disc for 12 hours in the sand grinder. The temperature in the sand grinder is 20-25 ° C. Further, this is filtered under pressure to obtain 60 parts by weight of the finely divided labside dispersion. If the media is washed twice with 70 parts by weight of water, 98% by weight of the love side can be recovered.

As shown in Table 2, this finely divided labside has 0.5
Particles having a particle size of μ or less consist of a 100% by weight particle size distribution.

Preparation Example 3 Simazine (herbicide) 56 parts by weight, formula (The molecular weight of the above formula compound is 320,000) 4.5 parts by weight of the water-soluble copolymer salt, 39.5 parts by weight of water, and 187 parts by weight of 0.1-0.2 mm glass beads (media) are mixed (media / dispersion). Liquid volume ratio = 53/47) and rotate the disc for 12 hours in the sand grinder. The temperature in the sand grinder is 20-25 ° C. Further, this is filtered under pressure to obtain 60 parts by weight of a finely divided simazine dispersion.

This micronized simazine, as shown in Table 2, is 0.5 μm.
Particles having the following particle sizes have a particle size distribution of 88% by weight.

Preparation Example 4 Carmex D (herbicide) 45.5 parts by weight, naphthalene sulfonic acid formalin condensate (condensation degree 4) Na salt 4.5 g, water 50 parts by weight and 0.1 to 0.2 mm glass beads (media) 180 parts by weight are mixed. (Media / dispersion liquid volume ratio = 50/50) and rotate the disc in a sand grinder for 3 hours.
The temperature in the sand grinder is 20-25 ° C. Furthermore,
When filtered under pressure, 68% by weight of finely divided Carmex D
Is obtained.

This finely divided Carmex D, as shown in Table 2,
Particles with a particle size of 0.5μ or less consist of a 95% by weight particle size distribution.

Preparation Example 5 Tsumaside (insecticide) powder 45.5 parts by weight, formula (The molecular weight of the above formula compound is 260,000) 4.5 parts by weight of a water-soluble copolymer salt represented by the formula, 50 parts by weight of water and 187 parts by weight of 0.1-0.2 mm glass beads (media) are mixed (media / dispersion). Liquid volume ratio = 50/50) and rotate the disk for 8 hours in the sand grinder. The temperature in the sand grinder is 20-25 ° C. Further, this is filtered under pressure to obtain 70 parts by weight of the microparticulated tsumaside dispersion.

As shown in Table 3, this finely divided tsumaside has 0.5
Particles having a particle size of μ or less have a particle size distribution of 90% by weight.

Preparation Example 6 Lanthanum (insecticide) powder 45.5 parts by weight, formula (The molecular weight of the above formula compound is 220,000) 4.5 parts by weight of a water-soluble copolymer salt represented by the formula, 50 parts by weight of water and 187 parts by weight of 0.1-0.2 mm glass beads (media) are mixed (media / dispersion). Liquid volume ratio = 50/50) and rotate the disk for 8 hours in the sand grinder. The temperature in the sand grinder is 20-25 ° C. Further, this is filtered under pressure to obtain 45 parts by weight of the finely divided lannate dispersion liquid.

As shown in Table 3, this finely divided lannate contained 0.5
Particles having a particle size of μ or less have a particle size distribution of 74% by weight.

Preparation Example 7 Plectran (acaricide) powder 45.5 parts by weight, formula (The molecular weight of the above formula compound is 180,000) 4.5 parts by weight of the water-soluble copolymer salt, 50 parts by weight of water and 187 parts by weight of 0.1-0.2 mm glass beads (media) are mixed (media / dispersion) Liquid volume ratio = 50/50) and rotate the disk for 8 hours in the sand grinder. The temperature in the sand grinder is 20-25 ° C. Further, this is filtered under pressure to obtain 70 parts by weight of the finely divided plectran dispersion.

This micronized Plectran, as shown in Table 3, has a density of 0.
Particles with a particle size of 5μ or less consist of a 100% by weight particle size distribution.

<Test Example 2> After adjusting the water content of the fine particle biocides obtained in Preparation Examples 1 to 7, a predetermined amount of a dispersant and other components were added, and the aqueous slurry shown in Table 4 was sprayed under the following conditions. It was dried to obtain a granular biocide composition shown in Table 5.

(Spray drying conditions) Spray nozzle diameter 0.8 mm, spray pressure 80 g / cm ² , hot air inlet temperature
Granules were prepared using a countercurrent spray dryer under the conditions of 180 ° C and exhaust air temperature of 100 ° C.

The physical properties of the powder and granules prepared under the above conditions were evaluated by the following methods, and the results are shown in Table 5.

Evaluation of self-dispersibility (disintegration) 125 ml of 3 times hard water is put in a 250 ml stoppered cylinder, and 1.2 g of the sample prepared by the above method is gently added.

At the same time as observing the self-dispersing property, the number of falls in which the charged particles are all collapsed and dispersed is counted by the method of inverting the capped cylinder once every 2 seconds.

The evaluation criteria for self-dispersibility are as follows.

4 Immediately disperses without forming secondary aggregates.

3 No secondary agglomerates are formed, but 50% of input particles are not dispersed.

2 Secondary aggregates do not form, but 80% or more of the input particles do not disperse.

1 Agglomeration between particles occurs and 100% of input particles are not dispersed.

Put 100 ml of hard water 3 times into a beaker of 100 ml of hydratability, gently add 1.0 g of the sample prepared by the above method, and measure the time until the powder or granules sink.

Suspension stability evaluation A sample is precisely weighed in a beaker, and 50 ml of 3 times hard water at 20 ° C is added and well mixed and dispersed. Transfer it to a 250 ml cylinder with a stopper, add 3 times hard water at 20 ° C. to make 250 ml, let stand for 15 minutes, shake vigorously 30 times for 1 minute, and let stand for 5 minutes. Next, put a 25 ml hole pipette in the liquid, keep the tip in the center of the liquid, gently take 25 ml of the test liquid, filter with a glass filter, dry the residue at 105 ° C for 4 hours, and suspend it from the following formula. Find the rate.

A: Weight of sample weighed first B: Weight of dry residue of collected test solution Particle size measurement Compared with particle size after preparation of pesticide slurry using centrifugal type particle sizer manufactured by Horiba Ltd. (CAPA-500) The particle size at the time of preparation and dilution of the powder and granules was measured.

The test was a secondary cohesive "measurement".

<Test Example 3> Using the micronized Daconyl granules obtained in Test Example 2 and conventional products, a biological test was conducted by the following method. The results are shown in Table 6.

(Test method) Cucumber (4 leaf stage) was sprayed with 5 ml each of the present invention product or conventional product at various concentrations, and after 3 days, a Botrytis spore suspension was sprayed. After spraying spores, keep at high humidity at 21 ℃ for 3 days,
The control effect of the product of the present invention and the conventional product was examined. The control value was evaluated according to the following evaluation criteria.

Evaluation criteria <Test Example 4> Using the herbicide micronized Carmex D granules obtained in Test Example 2 and a conventional product, a biological test was conducted by the following method. The results are shown in Table 7.

(Test method) Weeds of crabgrass were grown to a plant height of 7 cm to the 3-4 leaf stage, and the product of the present invention and a commercial product were sprayed on the weeds to examine their herbicidal efficacy. The evaluation was performed by measuring the above-ground fresh weight and determining the percentage of herbicidal relative to the untreated plot. The amount of diluted water sprayed was 20 per are.

<Test Example 5> Pesticide micronized Tsumaside granules obtained in Test Example 2 and corresponding commercial products, Tsumaside 30% emulsion and runnate 45%
Using a wettable powder, a biological test was conducted by the following method. The results are shown in Table 8.

(Test method) Rice (Nihonbare) was grown to a plant height of 25 cm and 7 leaf stage, and the product of the present invention and a commercial product were diluted to various concentrations to give 10 per strain.
ml was sprinkled. Six hours later, 50 larvae of Drosophila melanogaster were released, and the insecticidal rate against the untreated plot was measured 7 days after the release.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location A01N 47/24 E 9155-4H 47/30 A 9155-4H

Claims (1)

[Claims] 1. A granular biocide composition containing a micronized biocide in which particles having a particle size of 0.5 μ or less are 50 wt% or more and one or more kinds of dispersants selected from the following (1) to (4). The average particle size is 0.1 to 1.0 mm, and the bulk density is
A granular biocide composition, which is 0.20 to 0.6 g / cm ³ . (1) Water-soluble or water-dispersible polymer containing, as an essential component, one or more selected from the group of monomers consisting of unsaturated carboxylic acids and their derivatives (2) Styrene sulfonate polymer ( 3) Formalin condensate of sulfonated polycyclic aromatic compound which may have a hydrocarbon group as a substituent or a salt thereof (4) Alkali metal phosphate