JPH10279410A - Agricultural aqueous suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject suspension of low viscosity excellent in suspension stability by formulating a specific nitroguanidine derivative and aromatic sulfonic acids or a polyoxyalkylene allylphenyl ether sulfate with an adhesive water-soluble polymer. SOLUTION: This suspension contains (A) a compound [e.g. (E)-1-(2- chlorothiazol-5-ylmethyl)-3-methyl-2-nitroguanidine and the like] of the formula or its salt, (B) a condensation product between an aromatic sulfonic acid (e.g. phenylsulfonic acid and the like) or its salt and formaldehyde or a polyoxyalkylene allylphenyl ether sulfate and (C) and adhesive water-soluble polymer (e.g. a polyvinylpyrrolidone and the like). It is preferable that the objective suspension contains the components A, and B and C in amounts of 5-60 wt.%, 1-10 wt.% and 0.05-5 wt.%, respectively, based on the whole preparation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous agricultural suspension having an excellent insecticidal action, low viscosity and excellent suspension stability.

[0002]

2. Description of the Related Art Conventionally, dusts and granules are mainly used as dosage forms of agricultural pesticides. Since these preparations are formulated by mixing a low content of active ingredient with a large amount of a carrier such as clay, bentonite, calcium carbonate, etc., an amount of 2 to 6 kg per 10a is required for uniform application. . Therefore, the load on the worker is large, and there are many disadvantages in terms of transportation and storage. For this reason, high-concentration preparations that are easy to handle in small packages are being developed. The high-concentration preparation has a high content of the active ingredient and can be used by dispersing it in a suitable solvent such as water at the time of use. For example, emulsions and wettable powders are used. However, emulsions use large amounts of organic solvents,
In the case of wettable powders, powdering during the preparation of the spraying liquid is inevitable. For example, both dosage forms tend to be repelled in recent years. The wettable powder obtained by granulating the wettable powder has almost all the disadvantages of the wettable powder, but has a dispersed particle diameter of 10 when diluted with water.
Since it is as large as about several μm, when a high-concentration chemical solution is sprayed, inconveniences such as clogging of a spray nozzle occur.

[0003]

Problems to be Solved by the Invention

Embedded image The compound (I) or a salt thereof represented by the formula (1) is an agricultural insecticide having excellent pest control ability. It contains the compound (I) or a salt thereof, has a low viscosity, has good dischargeability of the preparation from a container, has good dispersibility in water at the time of dilution, and maintains fluidity for a long period of time, and precipitates suspended particles. There is a demand for the development of an aqueous suspension having excellent formulation stability that does not cause the caking phenomenon due to water.

[0004]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, formula (i)

Embedded image (I) or a salt thereof, (ii) a formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or a polyoxyalkylene allyl phenyl ether sulfate and (iii) an adsorptive water-soluble polymer. It has been found that the aqueous suspension has a low viscosity of 700 mPa · s or less, has good dispersibility in water at the time of dilution, and has excellent preparation stability over a long period of time. The present inventors have further studied based on this finding,
The present invention has been completed.

That is, the present invention provides a method of formula (1) (i)

Embedded image (I) or a salt thereof, (ii) a formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or a polyoxyalkylene allyl phenyl ether sulfate and (iii) an adsorptive water-soluble polymer. The aqueous suspension according to the above (1), which contains about 1 to 10% by weight of an aqueous suspension, (2) a formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or polyoxyalkylene allyl phenyl ether sulfate based on the whole preparation. A suspending agent, (3) one or more (preferably 1) selected from the group consisting of polyvinylpyrrolidone, alkylated vinylpyrrolidone copolymer, vinylpyrrolidone-styrene block copolymer and methylvinylether-maleic anhydride copolymer, wherein the adsorptive water-soluble polymer is (3) The aqueous suspension according to the above (1), which is a polymer of Agent, (4) further non-adsorbing above (1) a water-soluble polymer claim, wherein the aqueous suspension,
(5) a non-adsorbing water-soluble polymer is a polyol polymer,
The aqueous suspension according to the above (4), which is one or more (preferably 1 to 3) polymers selected from polysaccharides and polyethylene glycols; (6) the non-adsorbent water-soluble polymer is xanthan gum, starch and polyethylene At least one selected from glycols (preferably 1 to
(3) The aqueous suspension according to the above (4), which is a polymer, (7) the aqueous suspension according to the above (1) further containing a suspension aid, and (8) the suspension aid. (9) The aqueous suspension according to the above (1), which is one or more (preferably 1 to 3) substances selected from montmorillonite, colloidal silicon oxide, colloidal silicon oxide-aluminum oxide mixture, and sepiolite. Equation (i)

Embedded image (I) or a salt thereof, (ii) a formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or a polyoxyalkylene allyl phenyl ether sulfate and (iii) an adsorbent water-soluble polymer suspended in water. The present invention also relates to a method for producing an aqueous suspension according to the above (1), and (10) a method for controlling insect pests, which comprises spraying the aqueous suspension according to the above (1) on agricultural land.

Compounds used in the aqueous suspension of the present invention
As (I), there are E and Z isomers with respect to the arrangement of NO ₂ , and among them, (E) -1- (2-chlorothiazol-5-ylmethyl) -3-methyl-2-methyl-2-isomer Nitroguanidine (hereinafter abbreviated as compound (Ia)) is preferred. Examples of the salt of compound (I) include inorganic acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, phosphoric acid, sulfuric acid, and perchloric acid, for example, formic acid, acetic acid, tartaric acid, malic acid, citric acid,
Agrochemically acceptable salts with organic acids such as oxalic acid, succinic acid, benzoic acid, picric acid, p-toluenesulfonic acid are used. The compound (I) or a salt thereof and a production method thereof are described in, for example, JP-A-3-157308. The content of compound (I) or a salt thereof in the aqueous suspension of the present invention is usually about 5 to 60% by weight, preferably about 5 to 50% by weight, more preferably about 1 to 5% by weight, based on the whole preparation.
0 to 50% by weight, more preferably 15 to 45% by weight.

The formaldehyde condensate of aromatic sulfonic acid or a salt thereof used in the aqueous suspension of the present invention includes phenylsulfonic acid, aryl-substituted phenylsulfonic acid, phenolsulfonic acid, aryl-substituted phenolsulfonic acid, p-toluenesulfone Formaldehyde condensates with sulfonic acids such as acids, naphthalene sulfonic acids, alkyl-substituted naphthalene sulfonic acids, aralkyl-substituted naphthalene sulfonic acids, and anthracene sulfonic acids and alkyl-substituted anthracene sulfonic acids. Examples of the aryl group in the aryl-substituted phenylsulfonic acid or the aryl-substituted phenolsulfonic acid include C _6-14 aryl groups such as phenyl and naphthyl. 1 replacement
~ 3. Examples of the alkyl group in the alkyl-substituted naphthalenesulfonic acid include C _1-6 alkyl groups such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, and tert-butyl. The number of substitution is 1 to 7. Examples of the aralkyl group in the aralkyl-substituted naphthalenesulfonic acid include a phenyl-C _1-4 alkyl group such as benzyl, phenethyl and phenylpropyl, benzhydryl and trityl.
The number of substitution is 1 to 3. Examples of the alkyl group in the alkyl-substituted anthracenesulfonic acid include C _1-6 alkyl groups such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl and tert-butyl. The number of substitution is 1 to 9. The degree of condensation between the aromatic sulfonic acid and formaldehyde is from 1.2 to 30, preferably from 1.2 to 10. Among the above, a naphthalene sulfonate-formaldehyde condensate is preferred. Examples of the salt of the aromatic sulfonic acid include alkali metal salts such as sodium. Specific examples of the formaldehyde condensate of an aromatic sulfonic acid or a salt thereof include Newcargen FS-4 (a formaldehyde condensate of sodium naphthalenesulfonate; manufactured by Takemoto Yushi Co., Ltd.) and Newcargen 9131 (a formaldehyde condensate of phenylphenolsulfonic acid). Products; Takemoto Yushi Co., Ltd.), Labelin FM-
L (formaldehyde condensate of sodium β-naphthalene sulfonate; manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), Newcargen WG-2 (formaldehyde condensate of sodium β-naphthalene sulfonate; manufactured by Takemoto Yushi Co., Ltd.), Demol N (Formaldehyde condensate of sodium β-naphthalene sulfonate; manufactured by Kao Corporation), Demol C (formalin condensate of sodium aromatic sulfonate; Kao Corporation)
Manufactured). Particularly, Newcalgen FS-4 is preferable.

The polyoxyalkylene allyl phenyl ether sulfate has a molecular weight of 500 to 5,000. Examples of the polyoxyalkylene in the polyoxyalkylene allyl phenyl ether sulfate include polyoxyethylene, polyoxypropylene, and polyoxybutylene. Particularly, Newcalgen FS-7 (manufactured by Takemoto Yushi Co., Ltd.) containing polyoxyethylene allylphenyl ether sulfate as a main component is preferable. The content of the formaldehyde condensate of the aromatic sulfonic acid or a salt thereof or the polyoxyalkylene allyl phenyl ether sulfate in the aqueous suspension of the present invention is usually about 1 to 10 with respect to the whole preparation.
%, Preferably about 1 to 7% by weight.

In the aqueous suspension of the present invention, besides the formaldehyde condensate of aromatic sulfonic acid or its salt, or polyoxyalkylene allyl phenyl ether sulfate, other surfactants (eg, nonionic surfactants, anions At least one (preferably 1)
~ 3 types) can be used in combination. As the nonionic surfactant, ether type, for example, polyoxyalkylene allyl phenyl ether, formaldehyde condensate of polyoxyethylene allyl phenyl ether,
Preferred are polyoxyethylene alkyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene distyrenated phenyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene alkyl ether, polyoxyethylene-polyoxypropylene block copolymer, and the like. In addition, the nonionic surfactant used in the aqueous suspension of the present invention has a H
Those having an LB of 10 to 20 are preferred. More preferably, it is in the range of 12-18. More specifically,
Newcalgen FS-1 (manufactured by Takemoto Yushi Co., Ltd.) containing polyoxyalkylene allyl phenyl ether as a main component,
Newcalgen FS-1 based on formaldehyde condensate of polyoxyethylene allyl phenyl ether
1 (manufactured by Takemoto Yushi Co., Ltd.), Nonipol 100 (manufactured by Sanyo Chemical Industries, Ltd.) containing polyoxyethylene nonylphenyl ether as a main component, and Neugen EA-177 (manufactured by Sanyo Chemical Industries, Ltd.) Daiichi Kogyo Seiyaku Co., Ltd.), Neugen EA-142 containing polyoxyethylene alkyl allyl ether as a main component (Daiichi Kogyo Seiyaku Co., Ltd.), Neugen EA-157 containing polyoxyethylene alkyl ether as a main component (Manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) and the like are not limited thereto.

As the anionic surfactant, for example,
Lignin sulfonic acid metal salt, polyoxyethylene allyl phenyl ether phosphate amine salt, polyoxyethylene alkyl phenyl ether phosphate amine salt, dialkyl sulfosuccinate sodium salt, and the like. More specifically, Newcalgen WG-4 (manufactured by Takemoto Yushi Co., Ltd.) mainly composed of a metal salt of ligninsulfonic acid, and Newcalgen FS-3 mainly composed of a phosphate amine salt of polyoxyethylene allylphenyl ether. (Manufactured by Takemoto Yushi Co., Ltd.), Newcargen FS-31, Newcargen F containing polyoxyethylene alkylphenyl ether phosphateamine as a main component
S-32 (manufactured by Takemoto Yushi Co., Ltd.) or the like is used, but is not limited thereto. The content of such a surfactant used in combination in the aqueous suspension of the present invention is usually about 1 to 10% by weight, preferably about 1 to 5% by weight, based on the whole preparation.

In the aqueous suspension of the present invention, one or more (preferably 1 to 3)
Species) can contain other pesticidal active ingredients. Other pesticide active ingredients, if solid at room temperature, insecticides,
Any pesticidal active ingredient such as a bactericide may be used, and examples of the pesticidal active ingredient corresponding thereto are as follows. [Insecticide] pyridafenthion, dimethoate, PM
P, CVMP, dimethylvinphos, acephate, salicion, DEP, NAC, MTMC, MIPC, PH
C, MPMC, XMC, bendiocarb, pirimicarb, mesomel, oxamyl, thiodicarb, cypermethrin, cartap hydrochloride, thiocyclam, bensultap, diflubenzuron, teflubenzuron, chlorfluazuron, buprofezin, hexthiazox, fenbutazin oxide, pyridaben, clofentezin , Nitenpyram and the like. (Bactericide) Thiuram, captan, TPN, fusalide, tolclofosmethyl, fosetyl, thiophanatemethyl, benomyl, carbendazole, thiabendazole, dietofencarb, iprodione, vinclozolin, procymidone, fluoroimide, oxycarboxin, mepronil, flutranil, pencyclon, metalaxyl, oxadixyl Triadimefon, hexaconazole, triforine, blasticidin S, kasugamycin, polyoxin, validamycin A, mildiomycin, PCNB, hydroxyisoxazole, dazomet, dimilimol, diclomedine, triazine, ferrimzone, probenazole, isoprothiolane, tricyclazole, pyroquilon, oxolinic Acids and the like. In addition, as long as it is a pesticidal active ingredient that is solid at room temperature, it is not limited thereto.

The adsorptive water-soluble polymer is a protective colloid capable of adsorbing other hydrophobic substances by a hydrophobic group in the molecule, for example, polyvinylpyrrolidone, alkylated vinylpyrrolidone copolymer, vinylpyrrolidone-styrene block copolymer, Methyl vinyl ether-maleic anhydride copolymer is exemplified. The polyvinyl pyrrolidone has an average molecular weight of 5,000 to 2,000,000.
Degree is preferred, for example, Agrimer
15 (Average molecular weight: about 8000), Agrimer 30 (Average molecular weight: about 57500), Agrimer 60 (Average molecular weight: about 406000), Agrimer 90 (Average molecular weight:
Approximately 1270000)
Manufactured). As the alkyl in the alkylated vinyl pyrrolidone copolymer, methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, isopentyl, tert-pentyl, neopentyl, Hexyl, isohexyl, 2,
2-dimethylbutyl, heptyl, 2-methylhexyl,
Octyl, 2,2,4-trimethylpentyl, nonyl,
Decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, henicosyl, docosyl, tricosyl, include C _1-30 alkyl such tetracosyl. Among them, a C _1-24 alkyl group is preferred. Particularly, C ₄ , C ₁₆ or C ₂₀ alkyl is preferred. further,
The alkylation ratio of the alkylated vinylpyrrolidone copolymer is preferably about 5 to 90%, more preferably about 5 to 15% and about 40 to 60%. The average molecular weight of the alkylated vinylpyrrolidone copolymer is 1,
Those of about 000 to 100,000 are preferred. For example, Agrimer AL-10 (alkyl chain carbon number 4, alkylation rate about 10%, average molecular weight about 70,000), Agrimer AL-10LC (alkyl chain carbon number 4, alkylation rate about 10%, average molecular weight about 70000) ), Agrimer AL-25 (alkyl chain having 16 carbon atoms, alkylation rate about 50%, average molecular weight about 9500), Agrimer AL-
904 (alkyl chain has 4 carbon atoms, alkylation rate is about 10
%, Average molecular weight of about 16,000) (all of these are manufactured by ISP Corporation). The vinylpyrrolidone-styrene block copolymer has a molecular weight of 4
Approximately 0000 is preferable, and examples thereof include Agrimer ST (manufactured by ISP Corporation). As the methyl vinyl ether-maleic anhydride copolymer, a free acid compound having an average molecular weight of about 100,000 to 300,000 (eg, Agrimer VEMA H-240; manufactured by ISP Corporation), an average molecular weight of 100,000 to 30
About 0000 anhydrous (eg, Agrimer VEMA A)
N216; manufactured by ISP Corporation), average molecular weight 20,
Half-esters of about 000 to 60,000 (eg, Agrimer ES-22; manufactured by ISP Corporation) and the like. In the aqueous suspension of the present invention, sodium polyacrylate or carboxymethyl cellulose may be used in combination as another adsorptive water-soluble polymer. As the adsorptive water-soluble polymer, an alkylated vinylpyrrolidone copolymer is preferable. The content of the adsorptive water-soluble polymer in the aqueous suspension of the present invention is usually about 0.05 to 5% by weight, preferably about 0.1 to 3% by weight, based on the whole preparation.
More preferably, it is about 0.1 to 2% by weight.

In the aqueous suspension of the present invention, a non-adsorbable water-soluble polymer and / or a suspending aid may be used for stabilizing the suspension state and adjusting the viscosity. Non-adsorbing water-soluble polymers include polyol polymers (eg, Agrisol FL)
-104FA, manufactured by Kao Corporation), polysaccharides [eg, gum arabic, gelatin, guar gum, xanthan gum (eg, Rhodepol 23; Rhone Poulin Co., Ltd.)
), Starch (eg, Stabilose MKK100; manufactured by Matsutani Chemical Industry Co., Ltd.), starch derivative [eg, starch hydrolyzate (eg, Paindex, Matsutani Chemical Industry Co., Ltd.)
), Soluble starch (eg, Stabilose S-10; manufactured by Matsutani Chemical Industry Co., Ltd.), enzyme-modified starch (eg, AMICOL 6L; manufactured by Nisseki Chemical Co., Ltd.), pregelatinized starch (eg, corn alpha; Nissei Chemical Co., Ltd.), dextrins (eg, dextrin, cyclodextrin) and the like]], polyethylene glycol (eg, PEG6000; manufactured by Sanyo Chemical Co., Ltd.), and the like. Among them, polysaccharides such as xanthan gum and starch, and polyethylene glycol are preferred. When a non-adsorbing water-soluble polymer is used, its content is usually about 0.
05 to 10% by weight, preferably about 0.05 to 3% by weight.

The suspending aid is a water-insoluble additive, such as montmorillonite [eg, Kunipia F (Kunimine Industry Co., Ltd.)
And Laponite (manufactured by Nissin Kasei Co., Ltd.), colloidal silicon oxide (eg, Aerosil such as Aerosil 200;
Nippon Aerosil Co., Ltd.), a colloidal silicon oxide-aluminum oxide mixture (eg, Aerosil COK84; Si
_{O 2 / Al 2 O 3 =} 82~86 (%) / 14~18
(%); Nippon Aerosil Co., Ltd.), sepiolite (eg, Adeplus ML70DS-NV; Mizusawa Chemical Industry Co., Ltd.) and the like. Among them, montmorillonite is preferred. When a suspending aid is used, its content is usually about 0.05 to 10% by weight based on the whole preparation,
Preferably it is about 0.1-3% by weight. Additives such as non-adsorbable water-soluble polymers and suspension aids may be used alone or in combination of two or more.

In the aqueous suspension of the present invention, other additives used in ordinary aqueous suspensions can be used.
For example, a pH adjuster, an antifreezing agent, an antifoaming agent, a preservative and the like can be used freely, and these may be selected according to the content of the pesticidal active ingredient used. As the pH adjuster, for example, citric acid monohydrate is used. As the antifreezing agent, for example, ethylene glycol, diethylene glycol, glycerin and the like are used. As the defoaming agent, for example, a silicon-based defoaming agent (for example, Antihome E-20; manufactured by Kao Corporation) or the like is used.
As the preservative, for example, butylparaben (n-butylparahydroxybenzoate), potassium sorbate, sorbic acid and the like are used. When a pH adjuster is used, it is generally used in the range of about 0.01 to 5% by weight, preferably about 0.05 to 3% by weight, based on the whole preparation. When an antifreezing agent is used, it is used in an amount of usually about 1 to 20% by weight, preferably about 3 to 10% by weight, based on the whole preparation. If an antifoam is used,
It is usually used in the range of about 0.05 to 0.5% by weight, preferably about 0.05 to 0.3% by weight, based on the whole preparation. If a preservative is used,
Usually about 0.01 to 3% by weight, preferably about 0.01 to
It is used in the range of 1.5% by weight.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The aqueous suspension of the present invention can be prepared by a method known per se or a method analogous thereto: (i) compound (I) or a salt thereof, (ii) formaldehyde of an aromatic sulfonic acid or a salt thereof. Condensate or polyoxyalkylene allyl phenyl ether sulfate and (ii
i) It can be produced by suspending an adsorptive water-soluble polymer in water. For example, after thoroughly stirring and mixing (about 20 to 60 minutes) all the components to be used with a high-speed stirrer, finely pulverizing and dispersing with a wet pulverizer such as Dynomill or Microfluidizer (Production Method 1), A method in which the bulk of the active ingredient such as I) or a salt thereof is finely pulverized by a dry pulverizer such as a jet mizer, and the other components are mixed (about 30 to 90 minutes) and dispersed by a high-speed stirrer (Production method 2). ). As will be understood from the above-mentioned production method, the active ingredient of the aqueous suspension of the present invention is in the form of fine particles in the preparation and is dispersed in water. When other powder components are used, they are similarly dispersed in water. The average particle diameter of the fine particles is about 10 μm or less, preferably 0.1 to 5 μm.
μm.

Examples of cultivated plants to be applied include rice,
Wheat, barley, tensai, corn, cotton, vegetables (eg,
Cabbage, Chinese cabbage, radish, cucumber, eggplant, potato, etc.), fruit trees (eg, tangerines, peaches, none),
Tea, tobacco and the like. Pests to be applied include
For example, Hemiptera pests (eg, turtles, rice stink bugs,
Aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphid aphid, Aphia aphid , Lepidopteran pests (eg, Spodoptera litura, Diamondback moth, White-winged butterfly, Nikameiga, Tamanaginiwawa, Tobacco moth, Armyworm, Armyworm,
Watanomeiga, Kobunomeiga, potato mocha, chanohosoga, chanokokakumonhamaki etc.), Coleoptera pests (eg, Papilionidae, beetle beetle, cypress flea beetle, color potato beetle, turtle beetle,
Insect beetles, rice weevil, weevil, etc.), dipteran pests (eg, housefly, mosquitoes, oxflies, onion flies, etc.), orthoptera pests (eg,
Tonosama grasshopper, Kera, etc.), Reptiles (eg, German cockroaches, black cockroaches, etc.), spider mites (eg, red mite, mandarin spider mite, Kanzawa spider mite, Mises spider mite, apple spider mite, citrus red mite, etc.), nematodes (eg, rice locust nematode, etc.) Is mentioned.

The aqueous suspension of the present invention is an extremely safe pesticide with extremely low toxicity to animals and plants. The agricultural chemical formulation of the present invention is used as it is according to a known method of use or diluted at the time of use with a suitable solvent such as water. The method of using the pesticide preparation of the present invention varies depending on the place of use, etc., but according to known methods of use, such as spraying or dripping on agricultural land, such as paddy fields, uplands, orchards, turf or non-agricultural land, or Used by immersion. Specifically, for example, it can be used for aerial application, soil application, foliage application, nursery box application, lateral application, seed treatment, floor soil admixture, insect application, paddy water application, and the like. The amount of the aqueous suspension of the present invention used is
Although it varies depending on the content of the pesticidal active ingredient, it is usually about 1 to 500 g, preferably about 1 to 500 g, preferably 10 to 10 ares for paddy fields, fields (eg, fields of tea, wheat, sweet potato, corn, potato, cotton, etc.) and orchards. It is about 1 to 200 g.

[0019]

The present invention will be described more specifically with reference to the following examples and experimental examples. Compound (Ia) was prepared according to the method described in Examples of JP-A-3-157308 (Table-
4, compound No. 19). Further, the parts or percentages used herein indicate parts by weight or percentage by weight unless otherwise specified.

[0020]

Example 1 Compound (Ia) 20 parts Newcargen FS-45 Agrimer 30 1 Polyethylene glycol (PEG6000) 2 Loadpol 23 0.1 Antihome E-20 0.2 Ethylene glycol 4 Kunipia F 1 Butylparaben 0.1 Water Total 100 After the above raw materials were sufficiently mixed using a high-speed stirrer, wet pulverization was performed using a Dynomill (manufactured by Shinmaru Enterprises, 1.0 mm glass beads, filling rate 80%, peripheral speed 15 m / s) (1). Pass) to give an aqueous suspension containing 20% of compound (Ia).

[0021]

Example 2 Compound (Ia) 20 parts Neucargen FS-42 Agrimer AL-10 1 Stabilose MKK100 0.5 Antihome E-20 0.2 Ethylene glycol 4 Aerosil COK84 1 Butylparaben 0.1 Water Total 100 An aqueous suspension containing 20% of compound (Ia) was obtained in the same manner as in Example 1.

[0022]

Example 3 Compound (Ia) 20 parts Neucargen FS-7 3 Agrimer ST 1 Antihome E-20 0.2 Ethylene glycol 4 Aedplus ML70DS-NV 1 Butylparaben 0.1 Water Total 100 Same as in Example 1. To give an aqueous suspension containing 20% of compound (Ia).

[0023]

Example 4 Compound (Ia) 20 parts Neucargen FS-7 3 Agrimer VEMA H-240 0.5 Antihome E-20 0.2 Ethylene glycol 4 Kunipia F 1.5 Citric acid monohydrate 0.1 Butylparaben 0.1 water Total 100 By operating in the same manner as in Example 1, an aqueous suspension containing 20% of compound (Ia) was obtained.

[0024]

Example 5 Compound (Ia) 40 parts Neucargen FS-7 5 Agrimer AL-30 1 Antihome E-20 0.2 Ethylene glycol 7 Aerosil COK84 1.5 Loadpol 23 0.2 Butylparaben 0.1 Water Total 100 An aqueous suspension containing 40% of compound (Ia) was obtained in the same manner as in Example 1.

[0025]

Example 6 Compound (Ia) 21 parts Newcargen FS-42 Agrimer AL-10 0.5 Stabilose MKK100 0.3 Loadpol 23 0.1 Kunipia F 0.8 Butylparaben 0.1 Antihome E-20 0.2 Ethylene glycol 4 water Total 100 An aqueous suspension containing 21% of compound (Ia) was obtained in the same manner as in Example 1.

[0026]

Example 7 21 parts of compound (Ia) Newcargen FS-42 Agrimer AL-10 0.5 Polyethylene glycol (PEG6000) 2 Rhodopol 23 0.05 Kunipia F 0.65 Butylparaben 0.1 Anti-home E-20 0.2 Ethylene glycol 4 water Total 100 An aqueous suspension containing 21% of compound (Ia) was obtained in the same manner as in Example 1.

[0027]

Example 8 21 parts of compound (Ia) Newcargen FS-42 Agrimer AL-10 0.5 Polyethylene glycol (PEG6000) 2 Kunipia F 0.8 Butylparaben 0.1 Antihome E-20 0.2 Ethylene glycol 4 Water Total 100 An aqueous suspension containing 21% of compound (Ia) was obtained in the same manner as in Example 1.

[0028]

Test Example 1 The aqueous suspensions of Examples 1 to 8 were examined for viscosity, dispersibility in water, stability of a 10-fold diluted solution, and the presence or absence of caking by the methods described below. (1) Viscosity Measured at 25 ° C. with a B-type viscometer. (2) Dispersibility in water 500 ml of water was put into a 500 ml cylinder, and 0.5 ml of the preparation was added dropwise thereto. The dispersion condition in water at that time is excellent (A), good (B), poor (C),
It was evaluated as (D) which does not disperse. (3) Stability test of 10-fold diluent 450 ml of water and 50 ml of flowable (diluent suspension) were put into a 500 ml cylinder, and the cylinder was turned over 10 times. Fifteen
After standing for a time, the degree of separation of the aqueous phase was investigated. (3) Presence or absence of caking After preparation of each preparation, after standing at room temperature for 12 months,
The bottom was examined for caking. The results are shown in [Table 1].

[Table 1] From Table 1, the aqueous suspension of the present invention has a viscosity of 700 mPa · s.
It is understood that the dispersion is excellent in water dispersibility and the stock solution is excellent in stability.

[0029]

The compound (I) of the present invention or a salt thereof,
The aqueous suspension containing (ii) a formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or polyoxyalkylene allyl phenyl ether sulfate and (iii) an adsorptive water-soluble polymer has a low aqueous suspension of 700 mPas or less. It has good viscosity and good dischargeability of the formulation from the container.Also, it has good dispersibility in water at the time of dilution, and also maintains fluidity for a long time, and has excellent formulation stability that does not cause caking phenomenon due to settling of suspended particles. It can be used advantageously as an aqueous suspension.

Claims (10)

[Claims] (1) Formula (i) (I) or a salt thereof, (ii) a formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or a polyoxyalkylene allyl phenyl ether sulfate and (iii) an adsorptive water-soluble polymer. Aqueous suspension. 2. A formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or polyoxyalkylene allyl phenyl ether sulfate is added in an amount of about 1 to the whole preparation.
The aqueous suspension according to claim 1, which contains from 10 to 10% by weight. 3. The adsorptive water-soluble polymer is selected from polyvinylpyrrolidone, alkylated vinylpyrrolidone copolymer, vinylpyrrolidone-styrene block copolymer and methylvinylether-maleic anhydride copolymer.
The aqueous suspension according to claim 1, which is at least one polymer. 4. The aqueous suspension according to claim 1, further comprising a non-adsorbable water-soluble polymer. 5. The aqueous suspension according to claim 4, wherein the non-adsorbable water-soluble polymer is at least one polymer selected from a polyol polymer, a polysaccharide and a polyethylene glycol. 6. The aqueous suspension according to claim 4, wherein the non-adsorbable water-soluble polymer is at least one polymer selected from xanthan gum, starch and polyethylene glycol. 7. The aqueous suspension according to claim 1, further comprising a suspension aid. 8. The aqueous suspension according to claim 1, wherein the suspension aid is at least one substance selected from montmorillonite, colloidal silicon oxide, colloidal silicon oxide-aluminum oxide mixture, and sepiolite. (9) Formula (i) (I) or a salt thereof, (ii) a formaldehyde condensate of an aromatic sulfonic acid or a salt thereof, or a polyoxyalkylene allyl phenyl ether sulfate and (iii) an adsorbent water-soluble polymer suspended in water. The method for producing an aqueous suspension according to claim 1, wherein 10. A method for controlling insect pests, which comprises spraying the aqueous suspension according to claim 1 on agricultural land.