JP2688822B2 - Pesticide composition in suspension - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention uses a poorly water-soluble pesticide active ingredient as an active ingredient,
The present invention relates to a pesticidal composition in the form of suspension, which has a low viscosity and maintains stable properties for a long period of time.

(Prior Art) Conventionally, pesticidal active ingredients that are poorly soluble in water or organic solvents are difficult to be solvated or emulsified, and thus have been used in the form of powders, wettable powders and the like. Of these, powders have the advantages that they can be easily formulated and that they can be sprayed as they are, but they have the drawback that they are often scattered around when sprayed. Also, since the wettable powder is diluted with water and sprayed, it has an advantage that the pesticide active ingredient uniformly and efficiently adheres to the crop using water as a medium, but it is powdered when the wettable powder is diluted with water. It is not preferable from the standpoint of safety and health of workers.

In recent years, a suspension-type agricultural chemical composition in which finely divided agricultural chemical active ingredients are dispersed and suspended in water, that is, a formulation called a sol agent or flowable (hereinafter referred to as a sol agent) has been widely used. The sol is diluted with water in the same manner as the wettable powder, or is sprayed in the state of undiluted solution. Since this sol formulation is a liquid, it has excellent properties such as no dusting when diluted with water and lighter weight than a wettable powder.

So far, as a sol, a formulation prepared by suspending a poorly water-soluble pesticide active ingredient with water, a solvent, an anionic or nonionic surfactant and a water-soluble polymer such as carboxymethyl cellulose (Japanese Patent Publication No. 58-24401). No.), a formulation in which a nonionic surfactant and a heteropolysaccharide gum are added and suspended in water (Japanese Patent Publication No. Sho 53-46889), a nonionic surfactant and a heteropolysaccharide gum are added, and wet pulverized in water. (JP-A-52-128226), a suspension in which a surfactant and colloidal hydrous aluminum silicate are added and suspended (JP-B-54-11368) and the like are known.

(Problems to be Solved by the Invention) However, with the above-mentioned conventional sol agent, a formulation having satisfactory storage stability cannot be obtained, and thus the suspended components cannot be separated by sedimentation, and further the sedimented product cannot be reseparated. A hard caking layer may be formed. In order to sufficiently satisfy the storage stability, it is usual to increase the amount of the thickening agent and set the viscosity of the sol agent high.

However, this improves storage stability, but on the other hand causes problems due to high viscosity of the formulation, for example, it is difficult to take out the formulation from the container in use, and the amount remaining on the measuring container is large, resulting in inaccurate measurement. That is, in the aerial spraying, the stock solution may be disturbed. Further, as a problem in the production scene, for example, the filling speed into the container becomes slow, and the work efficiency decreases.

The present inventors have worked on the development of a sol agent having two properties that are contradictory to those of the prior art, namely, low viscosity, easy handling, and excellent storage stability for the purpose of solving such a problem. As a result of repeating enormous tests on agents and combinations thereof, fine particle aluminum oxide and heteropolysaccharide gum or further storage stability is excellent by blending a specific hydrocarbon solvent with these, and handling that the viscosity is low and The present invention has been completed by finding that a preparation having a preferable physical property can be obtained upon use.

(Means for Solving the Problems) One of the pesticidal compositions in suspension of the present invention is (a) one or more pesticidal active ingredients that are poorly soluble in water, (b) particulate aluminum oxide and (c). Heteropolysaccharide gum is contained, and each of these components is suspended in an aqueous solvent. Here, the aqueous solvent is water or water to which another solvent is added. Water is usually added in an amount of 20 to 60% by weight based on the pesticide composition.

Furthermore, another one of the pesticidal compositions in suspension of the present invention is (a)
One or more of poorly water-soluble pesticide active ingredients, (b) particulate aluminum oxide, (c) heteropolysaccharide gum and (d) methane hydrocarbons having 9 to 17 carbon atoms are 90
It contains a hydrocarbon solvent in an amount of at least wt%.

The viscosity of this pesticide composition in suspension is 10 to 300 cps, preferably 10 to 200 cps. The viscosity referred to here is B
Type viscometer (BL type, manufactured by Tokyo Keiki Co., Ltd.) is used, and the measurement conditions are that the rotor No. 2 is used, the rotation speed is 30 rpm, and the measurement temperature is 20 ° C.

The agrochemical active ingredient used in the present invention is not particularly limited as long as it is poorly soluble in water. The amount of the agrochemical active ingredient is 5 to 60% by weight based on the agrochemical composition in suspension.

 The following are mentioned as pesticide active ingredients.

5-methyl-1,2,4-triazolo (3,4-b) benzothiazole << Tricyclazole >>, 2-methyl-3'-isopropoxybenzanilide << Mepronil >>, tetrachloroisophthalonitrile << TPN >>, Manganese Ethylene bis (dithiocarbamate)
<< Manneb >>, dimethyl 4,4'-O-phenylene bis (3-thioallophanate) << thiophanate methyl >>, 1- (4-chlorobenzyl) -1-cyclopentyl-
3-Phenylurea << Pencyclone >>, 4,5,6,7-Tetrachlorophthalide << phthalide >>, 8-Oxyquinoline copper, fungicides such as cupric hydroxide, 0,0-dimethyl 0- [2- Chloro-1- (2,4-dichlorophenyl) vinyl] phosphate << dimethylvinphos >>, 1-naphthyl N-methylcarbamate << NAC >> m-tolyl N-methylcarbamate << MTMC >> 3,4-xylyl N-methyl Carbamate << MPMC >>, 2-sec-Butyl-4,6-dinitrophenyl 3-methylcrotonate << Vinapacryl >>, S- (4-phenoxybutyl) N, N-dimethylthiocarbamate << phenothiocarb >>, 2-sec-butyl Phenyl N-methyl carbamate << BPMC >>, 2- (4-ethoxyphenyl) -2-methylpyropyr-3-phenoxybenzyl ether << Etofenprot , O, O-dimethyl O- (3-methyl-4-nitrophenyl) thiophosphate << MEP >> and other insecticides and acaricides, 2-chloro-4,6-bis (ethylamino) -1, 3,5-triazine << CAT >>, 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine << gezaprim >>, N- (1-ethylpropyl) 3,4-dimethyl-2, 6-Dinitroaniline << Pendimetaline >>, S- (4-chlorobenzyl) N, N-diethylthiocarbamate << Benchocarb >>, 2-benzothiazol-2-yloxy-N-methylacetanilide << Mefenacet >>, methyl alpha- ( Herbicides such as 4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -O-triate << bensulfuronmethyl >> can be mentioned.

These pesticidal active ingredients can be used as a mixture of two or more kinds. In this case, a combination of fungicides, insecticides and herbicides may be used. In addition, 1,1'-iminiodi (octamethylene) diguanidinium triacetate, S-methyl N-[(methylcarbamoyl (oxy] thioacetimidate, O, S-dimethyl N-acetylphosphoramidothioate, etc. It is also possible to blend the pesticide active ingredient.

The particulate aluminum oxide used in the present invention means that the average particle diameter of primary particles is 50 nm or less, and is obtained by a very special production method called a vapor phase method, for example. The vapor phase method is a method of flame-hydrolyzing aluminum halide in a vapor phase, and the aluminum oxide obtained by this method has an extremely small particle size, and the crystal structure is mainly a delta type. Apparent specific gravity is about
It is characterized by being as small as 75 g /, and for example, aluminum oxide C (trade name, manufactured by Degussa, West Germany) is known.

Conventionally, aluminum oxide used in other industrial fields is produced by a so-called Bayer method in which a raw material bauxite is converted into aluminum hydroxide with sodium hydroxide, and this is baked at high temperature, and used in the present invention. Its properties are basically different from those of particulate aluminum oxide. According to the Bayer method, the particle size of primary particles is 1 to 20.
It is as large as μm, the crystal structure is alpha type, and the apparent specific gravity is as large as 500 to 1200 g /.

Next, the heteropolysaccharide gum used in the present invention is a natural polymer having a thickening effect, and examples thereof include xanthan gum, welan gum, guar gum and locust bean gum. Xanthan gum is a linear, high-molecular-weight polysaccharide produced by the fermentation of microorganisms, has a molecular weight of about 2 million, and its constituent monosaccharides are glucose, mannose, and glucuronic acid.

The amount of the particulate aluminum oxide and the heteropolysaccharide gum is usually 0.01 to the pesticide composition.
It is about 2% by weight. Further, the compounding ratio of the particulate aluminum oxide and the heteropolysaccharide gum is usually the former 1
The latter is 0.02-4 parts by weight, preferably 0.1-2 with respect to parts by weight.
It is in the range of parts by weight.

Further, a hydrocarbon solvent containing 90% by weight or more of a methane series hydrocarbon having 9 to 17 carbon atoms is obtained by highly refining a kerosene fraction, and has a high purity methane series hydrocarbon (paraffinic hydrocarbon). ) Is included. Its composition and properties are 90% by weight of paraffinic hydrocarbons having 9 to 17 carbon atoms.
As mentioned above, the naphthene-based hydrocarbon is 7% by weight or less, the aromatic hydrocarbon is 3% by weight or less, and the 95% distillation temperature is 270 ° C. or less. Product name includes No. 0 solvent (manufactured by Nippon Petrochemical Industry Co., Ltd.) and the like. These are different in composition and properties from kerosene and liquid paraffin used for agriculture. The content of this hydrocarbon solvent is 1 to 25% by weight, preferably 5 to 20% by weight, based on the pesticide composition.
It is.

In the suspended agricultural chemical composition of the present invention, a lignin sulfonate as a surfactant for dispersing the agricultural chemical active ingredient in water, an alkylbenzene sulfonate, a formalin condensate of naphthalene sulfonate, an alkylnaphthalene sulfonate, One of anionic surfactants such as polyoxyethylene styrenated phenyl ether sulfate and maleic acid styrene copolymer and one of nonionic surfactants such as polyoxyethylene nonyl phenyl ether, polyoxyethylene fatty acid ester and sorbitan oleic acid ester, or Two or more kinds can be added. The blending amount is 1 to 10% by weight of the pesticidal composition in suspension.

Further, the suspension-type agricultural chemical composition of the present invention contains a frost preventive agent such as propylene glycol, ethylene glycol, glycerin, ammonium sulfate, ammonium chloride, and urea in an amount of 5 to 15% by weight based on the suspension-type agricultural chemical composition, A defoaming agent such as silicone may be added in an amount of 100 to 1000 ppm, and other additives such as a decomposition inhibitor may be added.

Further, a plant growth regulator, an attractant, a repellent, a fertilizer, a fragrance, a coloring agent, a thickener, a stabilizer and other additives can be added.

Next, a method for producing the pesticidal suspension composition of the present invention will be described.
First, a predetermined amount of particulate aluminum oxide and a heteropolysaccharide gum and, if necessary, other components are added to a predetermined amount of water and dispersed by a stirrer. Next, a surfactant and an agrochemical active ingredient which has been coarsely crushed in advance are added, and if necessary, an antifreezing agent, an antifoaming agent and the like are further added and mixed and dispersed by a high speed stirrer. A wet grinder such as a sand grinder SL type (Igarashi Kikai Co., Ltd.), a dyno mill
Most of the agrochemical active ingredients are 10 μm or less, preferably 0.1 to 7 μm, using KDL type (WAB), Attritor MA-1S type (Mitsui Miike Co., Ltd.), etc. Wet pulverization is carried out in this manner to obtain the desired suspended pesticide composition.

Next, a specific description will be given with reference to examples of the present invention.
The present invention is not limited by these. In addition, all parts and% in each Example show a weight part and weight%.

Example 1 0.5 part of particulate aluminum oxide and xanthan gum
0.15 parts of water was mixed and dispersed in 48.35 parts of water, and 40 parts of coarsely pulverized mepronil, 3.5 parts of formalin condensate of sodium β-naphthalene sulfonate, 0.5 part of sodium alkylbenzene sulfonate, and 7 parts of ethylene glycol were added to the silicone AF- 200 ppm of 118N (the same from Asahi Kasei Kogyo Co., Ltd.) was added to the preparation, mixed with a high-speed stirrer for 30 minutes, and then ground with a wet grinder to obtain a sol preparation.

Example 2 0.15 parts of xanthan gum and 48.35 parts of water of Example 1 were replaced with 0.12 parts of welan gum and 48.38 parts of water to obtain a homogeneous sol preparation.

Example 3 0.15 parts of xanthan gum of Example 1 was replaced with 0.15 parts of guar gum to obtain a homogeneous sol preparation.

Example 4 0.15 parts of xanthan gum and 48.35 parts of water of Example 1 were replaced with 0.23 parts of locust bean gum and 48.27 parts of water to obtain a homogeneous sol preparation.

Example 5 0.15 parts of xanthan gum of Example 1 and 48.35 parts of water were added to 0.07 part of xanthan gum, a solvent containing hydrocarbons in the methane series (hydrocarbons in the methane series 99.9%, naphthenic hydrocarbons 0.1%, carbon number in the methane series 9 to 9). 13, 95% distillation temperature 190 ℃)
A homogeneous sol formulation was obtained by substituting 5 parts and 43.43 parts of water.

Example 6 0.15 parts of xanthan gum and 48.35 parts of water of Example 1 were replaced with 0.1 parts of xanthan gum and 48.4 parts of water to obtain a homogeneous sol preparation.

Example 7 0.15 parts of xanthan gum and 48.35 parts of water of Example 1 were added to 0.07 part of xanthan gum, 0.07 part of welan gum and 48.35 of water.
A homogeneous sol formulation was obtained.

Example 8 0.3 part of particulate aluminum oxide and 0.1 of welan gum
2 parts of water was mixed and dispersed in 48.58 parts of water, and coarsely crushed TPN4 was added to this.
Add 0 parts, polyoxyethylene styrenated phenyl ether sulfate 3 parts, ethylene glycol 8 parts and 200 ppm of silicone AF-118N to the formulation, mix with a high speed stirrer for 30 minutes, and then crush with a wet crusher. A sol preparation was obtained.

Example 9 Welan gum 0.12 parts and water 48.58 parts of Example 8 were added to welan gum 0.06 parts, methane series hydrocarbon-containing solvent (methane series hydrocarbon 94%, naphthene series hydrocarbon 5%, aromatic series hydrocarbon 1%, methane). A homogeneous sol formulation was obtained by replacing 5 parts of hydrocarbons in a row with 12 to 15 carbon atoms, 95% distillation temperature of 250 ° C.) and 43.64 parts of water.

Example 10 1.4 parts of particulate aluminum oxide and 0.04 part of guar gum were mixed and dispersed in 65.56 parts of water, and coarsely crushed 20 parts of tricyclazole, 2 parts of polyoxyethylene styrenated phenyl ether, 3 parts of sodium alkylnaphthalenesulfonate, and ethylene. Silicone AF-118N was added to the preparation at 200 ppm in addition to 8 parts of glycol, mixed for 30 minutes with a high-speed stirrer, and then ground with a wet grinder to obtain a sol preparation.

Example 11 Fine particles of aluminum oxide (0.4 parts) and locust bean gum (0.25 parts) were mixed and dispersed in water (72.35 parts), and coarsely pulverized into 10 parts of bensulfuron methyl, 4 parts of sodium ligninsulfonate, and 3 parts of polyoxyethylene fatty acid ester.
Part, urea 10 parts, and 200 ppm of silicone AF-118N was added to the formulation, and after mixing for 30 minutes with a high-speed stirrer,
It was crushed with a wet crusher to obtain a sol preparation.

Example 12 0.5 part of particulate aluminum oxide and 0.2 part of locust bean gum were mixed and dispersed in 43.3 parts of water, and coarsely pulverized into this, 2 parts of bensulfuron-methyl, 40 parts of bench iocur, polyoxyethylene styrenated phenyl ether sulfate 4
Parts, sodium alkylnaphthalene sulfonate 2 parts, ethylene glycol 8 parts and silicone AF-11
200 ppm of 8N was added to the preparation, mixed for 30 minutes with a high-speed stirrer, and then ground with a wet grinder to obtain a sol preparation.

Example 13 0.7 parts particulate aluminum oxide and 0.15 guar gum
15 parts of water are mixed and dispersed, and 20 parts of etofenprox, 20 parts of pencyclone, 3 parts of polyoxyethylene alkyl ether, 3 parts of polyoxyethylene nonylphenyl ether sulfate, and 8 parts of propylene glycol are mixed and dispersed in 45.15 parts of water. Silicone AF-118N with formulation
After adding 200 ppm and mixing for 30 minutes with a high speed stirrer, it was ground with a wet grinder to obtain a sol preparation.

Example 14 0.5 part of particulate aluminum oxide and xanthan gum
0.18 parts of water was mixed and dispersed in 46.32 parts of water, and 40 parts of coarsely ground phthalide, 2 parts of polyoxyethylene styryl phenyl ether, 3 parts of maleic acid styrene copolymer, 8 parts of ethylene glycol and silicone AF-11 were added.
200 ppm of 8N was added to the preparation, mixed for 30 minutes with a high-speed stirrer, and then ground with a wet grinder to obtain a sol preparation.

Example 15 0.18 parts of xanthan gum and water 46.32 parts of Example 14 0.1 part xanthan gum, solvent containing methane series hydrocarbons (methane series hydrocarbons 98%, naphthene series hydrocarbons 1.5%, aromatic series hydrocarbons 0.5%, methane Carbon number of row hydrocarbon 13 to 17.
A homogeneous sol preparation was obtained by substituting 10 parts of 95% distillation temperature of 265 ° C) and 36.4 parts of water.

Example 16 0.5 part of particulate aluminum oxide and xanthan gum
0.13 parts of water is mixed and dispersed in 45.37 parts of water, and coarsely pulverized 40 parts of dimethyl vinphos, 4 parts of sodium ligninsulfonate, 3 parts of polyoxyethylene fatty acid ester and 7 parts of ethylene glycol, and silicone AF-118N is prepared. To the above, 200 ppm was added, mixed for 30 minutes with a high-speed stirrer, and then pulverized with a wet pulverizer to obtain a sol preparation.

Next, the formulations used for comparison in the test examples are shown as reference examples.

Reference Example 1 0.5 parts of the particulate aluminum oxide of Example 1, 0.15 parts of xanthan gum and 48.35 parts of water were replaced with 0.2 parts of xanthan gum and 48.8 parts of water to obtain a homogeneous sol preparation.

Reference Example 2 0.5 parts of particulate aluminum oxide of Example 1, 0.15 parts of xanthan gum and 48.35 parts of water were replaced with 0.35 parts of xanthan gum and 48.65 parts of water to obtain a homogeneous sol preparation.

Reference Example 3 0.5 parts of the particulate aluminum oxide of Example 1, 0.15 parts of xanthan gum and 48.35 parts of water were replaced with 1.5 parts of particulate aluminum oxide and 47.5 parts of water to obtain a homogeneous sol preparation.

Reference Example 4 0.5 parts of the particulate aluminum oxide of Example 1, 0.15 parts of xanthan gum and 48.35 parts of water were replaced with 2.5 parts of particulate aluminum oxide and 46.5 parts of water to obtain a homogeneous sol preparation.

Reference Example 5 A uniform sol preparation was obtained by replacing 0.5 part of the particulate aluminum oxide of Example 1 with 0.5 part of aluminum oxide produced by the Bayer method.

Reference Example 6 0.5 part of the particulate aluminum oxide of Example 1, 0.15 part of xanthan gum and 48.35 parts of water were replaced with 1 part of colloidal hydrous aluminum silicate and 48 parts of water to obtain a homogeneous sol preparation.

Reference Example 7 0.5 parts of the particulate aluminum oxide of Example 1, 0.15 parts of xanthan gum and 48.35 parts of water were replaced with 1.8 parts of colloidal hydrous aluminum silicate and 47.2 parts of water to obtain a homogeneous sol preparation.

Reference Example 8 0.4 part of the particulate aluminum oxide of Example 11, 0.25 part of locust bean gum and 72.35 parts of water were replaced with 0.3 part of locust bean gum, 0.7 part of powdered silica and 72 parts of water to obtain a homogeneous sol preparation.

Reference Example 9 0.7 parts of the particulate aluminum oxide of Example 13, 0.15 parts of guar gum and 45.15 parts of water were added to the particulate aluminum oxide.
A homogeneous sol formulation was obtained by replacing 1.5 parts and 44.5 parts of water.

Reference Example 10 0.8 part of aluminum oxide prepared by the Bayer method from 0.3 part of particulate aluminum oxide of Example 8, 0.12 part of welan gum and 48.58 parts of water, 0.12 part of welan gum and 4 parts of water
A homogeneous sol formulation was obtained by substituting 8.08 parts.

Reference Example 11 0.5 part of particulate aluminum oxide of Example 14, 0.18 part of xanthan gum and 46.32 parts of water were replaced with 0.2 part of xanthan gum and 46.8 parts of water to obtain a homogeneous sol preparation.

Reference Example 12 0.5 parts of the particulate aluminum oxide of Example 1 and 0.15 parts of xanthan gum were replaced with 0.65 parts of carboxymethyl cellulose to obtain a homogeneous sol preparation.

(Effects of the Invention) The pesticidal composition in suspension according to the present invention has excellent storage stability, hardly shows sedimentation and separation of suspended components even after long-term storage, and is hard to redisperse the sediment. It does not form a caking layer. Furthermore, it is possible to lower the viscosity of the formulation, which improves wet pulverization efficiency in formulation situations, facilitates filling into containers, facilitates accurate weighing in use situations, and removes from packaging containers. It is easy, the dispersibility in water is good, the preparation of the spray solution is easy, and the sprayability is good in the spraying of the undiluted solution in the air, which enables stable drug spraying.

The suspension pesticide composition according to the present invention can achieve its purpose sufficiently by blending aluminum in the form of fine particles and heteropolysaccharide gum.
The effect can be improved by blending the petroleum hydrocarbon solvent containing 90% or more of the methane series hydrocarbons.

Next, the effects of the present invention will be described with reference to test examples.

Test Example 1 Storage Stability Test 500 g of the sol preparation was placed in a 500 ml glass bottle and allowed to stand in a thermostatic chamber at 40 ° C. for 2 months. The separation and sedimentation property of the sol preparation was measured every month. The survey was calculated by the ratio (%) of the height of the supernatant portion to the height of the whole liquid. After the measurement, the glass rod was gently put in and the presence or absence of the hard caking layer was observed.

The storage stability is better as the proportion of the supernatant part is smaller, and the formation of the hard caking layer is unsuitable as a sol formulation. The results are shown in Table 1.

Test Example 2 Viscosity Test The sample used in Test Example 1 was repeatedly inverted 30 times, and then the viscosity was measured. A B-type viscometer (BL type, manufactured by Tokyo Keiki Co., Ltd.) was used for the measurement, and the measurement conditions were rotor No. 2, rotor rotation speed 30 rpm, and measurement temperature 20 ° C. The results are shown in Table 2.

Test Example 3 Dispersibility Test in Water 250 ml of water was put into a 250 ml graduated cylinder, the sol preparation was dropped from a pipette to observe the dispersed state, and the following four-stage evaluation was performed.

A: The dispersion state is extremely good. The drug easily diffuses and disperses in water. It is the most preferable formulation as a sol formulation.

◯: The dispersed state is good. The drug drops in the form of droplets while partially diffusing in the water, but is almost dispersed by the time it reaches the bottom. It is a preferable preparation as a sol preparation.

Δ: The dispersion state is slightly poor. Most of the drug drops to the bottom in the form of droplets, but is dispersed by shaking the measuring cylinder. It may be a problem in practical use.

X: Dispersion state is bad. The drug drops to the bottom in the form of droplets,
Shaking the graduated cylinder does not disperse easily. Not suitable as a sol formulation.

 The results are shown in Table 2.

Test Example 4 Ejection test from container 500g of sol formulation was placed in a 500ml polyethylene container with a diameter of 6.5cm and a height of 15cm, which is usually used for liquid pesticides, and stored in a thermostat at 40 ° C for 2 months. The dischargeability from the container was measured by the following method.

After repeating the inversion of the polyethylene container 30 times, the container was inverted, the sol formulation was discharged, and the discharge weight at the time when the interval of the droplets dropping from the mouth of the container was 10 seconds or more was weighed. The discharge ratio was calculated by calculating the ratio (%) of the discharged weight to the amount of the formulation initially filled. In this case, the same operation was performed on the hard caking layer.
It does not particularly destroy the hard caking layer. The higher the dischargeability is, the smaller the residual amount in the container is, and the better, and the degree of the dischargeability is one of the important indicators of the difficulty of handling in the manufacturing scene. The results are shown in Table 2.

Claims (3)

(57) [Claims] Claims: (a) one or more kinds of poorly water-soluble pesticide active ingredients, (b) fine particulate aluminum oxide and (c).
A pesticide composition in the form of a suspension, which comprises a heteropolysaccharide gum. 2. (a) One or more kinds of poorly water-soluble pesticide active ingredients, (b) particulate aluminum oxide, (c) heteropolysaccharide gum, and (d) methane hydrocarbons having 9 to 17 carbon atoms. Is a suspension-type agricultural chemical composition containing 90% by weight or more of a hydrocarbon solvent. 3. The pesticidal composition in suspension according to claim 1 or 2, wherein the composition has a viscosity of 10 to 300 cps.