JP2010502561A - Suspended pesticide composition in water - Google Patents

Abstract

  The object of the present invention is to ensure a satisfactory dispersion, suspension, emulsification or combination of the components, a liquid agrochemical component that prevents the decomposition of the active component while inhibiting its precipitation and aggregation even when stored for a long period of time. And a water-suspendable agricultural chemical composition comprising a solid agricultural chemical component. The invention is practiced by preparing an aqueous suspension agrochemical composition comprising at least one liquid agrochemical component, at least one solid agrochemical component, at least one oil, and at least one surfactant.

Description

  The present invention relates to a stable suspension in water pesticide composition comprising at least one liquid agrochemical component and at least one solid agrochemical component.

  Pesticides are classified based on the dosage form of the composition, especially in the case of paddy rice pesticides, because the purpose of application is to control undesirable vegetation and harmful insects such as grass and weeds in paddy fields. Solid granules are mainly considered in order to ensure application of the required amount of pesticides while also saving. However, in the case of a granular composition, there exists a problem that it is difficult to spread uniformly over the whole surface of a field. In addition, attempts have been made in recent years to improve work efficiency using techniques that increase the size of the granules themselves, increase the amount of active ingredient (herbicidal active ingredient) and decrease the application rate.

  On the other hand, in addition to solid granules, there are also emulsions used for pre-planting treatments and water-suspended agricultural chemical compositions used for post-planting treatments. Liquid pesticide compositions, especially water-suspended pesticide compositions, have attracted attention in recent years because of their ability to reduce environmental impact, their ease of handling, and ease of uniform spraying, dilution and concentration adjustment. ing. However, in water-suspended agricultural chemical compositions, the active ingredient is unstable in the presence of moisture, or when two or more active ingredients are blended, especially when combining a liquid ingredient and a solid ingredient, It is difficult to suspend and disperse the active ingredient uniformly, and the active ingredient tends to separate, precipitate or aggregate.

  When formulating a liquid composition containing two or more active ingredients having different physical properties, hydrolysis, precipitation and precipitation of all active ingredients while ensuring proper dispersion, suspension, emulsification and combination of the active ingredients It is necessary to design the composition so as to inhibit aggregation. Often, auxiliaries such as emulsifiers, emulsion stabilizers, and surfactants are used, but there is an increase in hydrolysis or aggregation of the active ingredient corresponding to the compatibility between the active ingredient and the auxiliary used. There is. For example, when prescribing an aqueous liquid composition containing pretilachlor, which is one of chloroacetamide herbicides that are liquid at room temperature, and bensulfuron methyl, which is one of sulfonylurea herbicides that are solid at room temperature, The use of auxiliaries such as emulsion stabilizers and surfactants is indispensable for suspending and dispersing the active ingredient, but depending on the type of auxiliary used, significant hydrolysis or precipitation of bensulfuron methyl, There are problems such as aggregation.

  For example, Japanese Patent Application Laid-Open No. 10-287503 discloses a polyvinyl alcohol having an average polymerization degree of 2000 or less and a saponification degree of 69 to 90 mol% as a sulfonylurea herbicide as an agrochemical active ingredient and a herbicidal active ingredient having dog shrimp herbicidal activity. , And aqueous suspension compositions consisting of water show satisfactory composition stability and improved diffusivity, and prevent chemical damage to rice plants by preventing chemical damage . Further, JP-A-9-183704 describes that an aqueous suspension composition containing a sulfonylurea herbicide compound having excellent long-term storage stability can be obtained by adding lignin sulfonate. .

  It is an object of the present invention to ensure the dispersion, suspension, emulsification, or a combination of the components contained in an aqueous suspension agricultural chemical composition containing a liquid agricultural chemical component and a solid agricultural chemical component, and hydrolysis even when stored for a long period of time. It is to provide a composition in which precipitation is inhibited and precipitation and aggregation are also inhibited.

  As a result of extensive research focusing on the above-mentioned problems, the present inventor blends fats and oils in a water-suspendable agricultural chemical composition containing at least one liquid agricultural chemical component and at least one solid agricultural chemical component. Thus, the present inventors have found that the above problems can be solved, and have completed the present invention. Accordingly, this application includes the following inventions.

  In a first aspect, the present invention provides a water-suspendable agricultural chemical composition comprising at least one liquid agricultural chemical ingredient, at least one solid agricultural chemical ingredient and at least one fat.

  In a first embodiment, the present invention provides a water-suspendable agricultural chemical composition wherein the fat is selected from the group consisting of mineral oil, vegetable oil, fatty acid ester, epoxidized vegetable oil and liquid paraffin.

  In a second embodiment, the present invention provides a water-suspendable agrochemical composition comprising a nonionic surfactant.

  In a third embodiment, the present invention provides a water-suspendable agricultural chemical composition in which the nonionic surfactant is a polyoxyethylene-polyoxypropylene block polymer.

  In a fourth embodiment, the present invention provides a water-suspendable agricultural chemical composition in which the agricultural chemical component is at least one herbicide.

  In a fifth embodiment, the present invention provides a water-suspendable agricultural chemical composition in which the agricultural chemical component is at least one insecticide.

  In a fourth embodiment, the present invention provides a water-suspendable agricultural chemical composition wherein the agricultural chemical component is at least one fungicide.

  In a sixth embodiment, the present invention provides an underwater pesticidal composition comprising at least one fungicide and at least one insecticide as a pesticide ingredient.

  In a seventh embodiment, the present invention provides a water-suspendable agricultural chemical composition in which at least one of the liquid agricultural chemical components is a chloroacetamide herbicide.

  In an eighth embodiment, the present invention provides a water-suspendable agricultural chemical composition in which the chloroacetamide herbicide is pretilachlor.

  In a ninth embodiment, the present invention provides a water-suspendable agricultural chemical composition in which the chloroacetamide herbicide is metolachlor or S-metolachlor.

  In an eleventh embodiment, the present invention provides a water-suspendable agricultural chemical composition in which at least one of the solid agricultural chemical components is a sulfonylurea herbicide.

  In a twelfth embodiment, the present invention provides a water-suspendable agricultural chemical composition in which the sulfonylurea herbicide is bensulfuron methyl.

  In a twelfth embodiment, the present invention provides a water-suspendable agricultural chemical composition further comprising pyriftalide as a solid agricultural chemical component.

  In a second aspect, the present invention provides an undesirable vegetation in a crop of useful plants, particularly a gramineous crop, comprising the step of allowing an effective amount of an aqueous suspension pesticide composition to act when control is desired. Provide a way to control.

  In a third aspect, the present invention provides a suspending pesticide composition in water for controlling grasses and weeds in useful plant crops, particularly grasses.

  In a fourth aspect, the present invention provides a method for preparing an agrochemical composition by blending fats and oils in a water-suspendable agricultural chemical composition containing at least one liquid agricultural chemical component and at least one solid agricultural chemical component. ing.

  According to the present invention, in a water-suspendable pesticide composition containing a liquid pesticide component and a solid pesticide component, satisfactory dispersion, suspension, emulsification, or a combination of the components is ensured, and hydrolysis is performed even when stored for a long time. Are inhibited, and precipitation and aggregation are also inhibited.

  The present invention provides a water-suspendable agricultural chemical composition comprising at least one liquid agricultural chemical ingredient, at least one solid agricultural chemical ingredient, and at least one fat.

  Liquid pesticide components that can be used in the water-suspendable pesticide composition according to the present invention are specified at room temperature and normal pressure, such as the temperature in the composition, in the composition or in the spray liquid, or specified Depending on the case, there is no particular limitation, provided that it is in a glassy, oily or liquid state at a temperature of up to about 50 ° C. Standard examples include chloroacetamide compounds such as pretilachlor, carbamate compounds and dinitroaniline compounds. Furthermore, components that are oily in purity and commonly used in pesticidal compounds are also included in the liquid pesticidal component of the present invention, even if they are in solid form at room temperature when in pure form. The agrochemical component may be, for example, a herbicide, fungicide, fungicide, nematicide, parasiticide, or other biocide. The liquid agrochemical component is preferably a herbicide, insecticide, fungicide or insecticide / fungicide, particularly preferably a herbicide.

  Examples of liquid herbicides include pretilachlor (656), metolachlor (548), prodiamine (661), esprocarb (303), prosulfocarb (683), triclopyr (827), fluazifop (681), orbencarb (595) ), Molinate (560), dimethinamide (260), pelargonic acid (583), darapon (214), piperophos (560), butamifos (102), glyphosate trimesium (419), cetoxydim (726), cletodim (153), Examples thereof include, but are not limited to, S.metolachlor (549) and symmetrin (153). In the present invention, pretilachlor (656) and metolachlor (548), which are chloroacetamide herbicides, are preferred, and pretilacol is particularly preferred. These compounds and their agriculturally acceptable salts are described, for example, in “The e-Pesticide Manual”, 13th edition, version 3.1, edited by CDC Tomlin, British Crop Protection Council, 2004-2005. Has been.

  Examples of liquid insecticides include cyanophos (184), fenthion (346), fenitrotin (335), diclofenthion (1051), pyrimiphos-methyl (1345), diazinon (227), isoxathione (480), oxydeprofos (1324) ), Malathion, phentoate (631), formothion (1192), thiomethone (801), disulfone (278), prothiophos (686), sulfprofos (1408), propenophos, pyracrophos (689), dichlorvos (286), nared (657) , Chlorfenvinphos (131), propofos (1356), isofenphos (1236), ethion (309), carbosulfan (119), benfracarb (60), alletrin (17) , Parmentrin (626), cyhalothrin (196), cyfluthrin (193), fenvalerate (349), flucitrinate (367), fulvalinate (1184), cycloprotorin (188), silafluophene (728), propal guide (671), Halfenprox (424), Etoprophos (312), Fostiazate (408), but are not limited thereto. These compounds and their agriculturally acceptable salts are described, for example, in “The e-Pesticide Manual”, 13th edition, version 3.1, edited by CDC Tomlin, British Crop Protection Council, 2004-2005. is described.

  Other examples of liquid pesticide ingredients include liquid fungicides, particularly fungicides such as calcium polysulfide (111), edifenphos (290), propiconazole (675), pefrazate (618), pyrifenox (703), Tetraconazole (778), echromestol (321), dinocap (270), metalaxyl M (516) are included. These compounds and their agriculturally acceptable salts are described, for example, in “The e-Pesticide Manual”, 13th edition, version 3.1, edited by CDC Tomlin, British Crop Protection Council, 2004-2005. Has been.

  The liquid agrochemical component according to the present invention preferably has a low water solubility, for example, a water solubility of 1000 mg / l or less, preferably 500 mg / l or less at room temperature and normal pressure. Examples of such liquid agrochemical components are pretilachlor (water solubility: 50 mg / l), metolachlor (water solubility: 488 mg / l), prodiamine (water solubility: 0.013 mg / l), esprocalp (water solubility: water solubility: 4.9 mg / l), prosulcalp (water solubility: 13.2 mg / l), metalaxyl-M (water solubility: 28 mg / l).

  The liquid agrochemical component described above is preferably 0.1 to 60 parts by mass, more preferably 5 to 40 parts by mass, with 100 parts by mass as the total mass of the water-suspendable agrochemical composition claimed in the present invention. The amount is blended.

  For solid agrochemical components that can be used in the water-suspendable agrochemical composition according to the present invention, they are in a solid state at normal temperature and normal pressure, such as the temperature in the composition or in the spraying liquid, during composition production. There are no special restrictions, provided that they are pesticide ingredients. Standard examples of these components include sulfonyl compounds. Agrochemical ingredients can be, for example, herbicides, fungicides, fungicides, nematicides, parasiticides, and other biocides. The liquid agrochemical component is preferably a herbicide, insecticide, fungicide or insecticide / fungicide, particularly preferably a herbicide.

  Examples of solid herbicides include bensulfuron methyl (64), CNP (974), naproanilide (517), bufenox (75), pyributycarb (698), bromobutide (93), mefenacet (505), diimron (213) , Imazosulfuron (456), pyrazosulfuron-ethyl (694), cimethrin (732), promethrin (666), dimetamethrin (259), clomethoxynil, oxadiazone (600), pyrazolate (692), pyrazoxifene (695), chromeprop (160), Benzofenap (70), Tenilchlor (789), Oxadichromemephone (604), Pentoxazone (625), Caffentrol (110), Azimusulfuron (43), Pyriminobac-methyl (7 7), fentrazamide (348), and bispyribac - but the sodium salt (82), but are not limited thereto. In the present invention, sulfonylsulfuron-methyl (64) which is a sulfonylurea herbicide is particularly preferable. These compounds and their agriculturally acceptable salts are described, for example, in “The e-Pesticide Manual”, 13th edition, version 3.1, edited by CDC Tomlin, British Crop Protection Council, 2004-2005. Has been.

  Examples of solid insecticides include imidacloprid (458), dinotefuran (271), thiamethoxam (792), acetamiprid (4), thiacloprid (791), nitenpyram (579), NAC (115), pyridafenthione (701), chlorpyrifos- Examples include, but are not limited to, methyl (146), dimethoed (262), acephate (2), cartap (123), thiocyclam (798), bensultap (66), and buprofezin (99). These compounds and their agriculturally acceptable salts are described, for example, in “The e-Pesticide Manual”, 13th edition, version 3.1, edited by CDC Tomlin, British Crop Protection Council, 2004-2005. Has been.

  Examples of solid fungicides, in particular solid fungicides, include cyprodinil (208), meparipyrim (508), pyrimethanil (705), metalaxyl (516), mepronil (510), flutolanil (396), teclophthalam (766), pencyclon (620), dichromedin (239), triflumizole (834), kasugamycin (483), validamycin (846), probenazole (658), isoprothiolane (474), cyproconazole (207), metconazole (525), tricyclazole ( 828), Pyroxylone (710), Oxolinic acid (606), Ferimzone (351), Iprodione (470), Triphorin (838), Pixoxystrobin (647), Azoxystrobin (47), Cresoxime- Chill (485), orysastrobin, pyraclostrobin (690), trifloxystrobin (832), and metominostrobin (551) including but not limited thereto. These compounds and their agriculturally acceptable salts are described, for example, in “The e-Pesticide Manual”, 13th edition, version 3.1, edited by CDC Tomlin, British Crop Protection Council, 2004-2005. Has been.

  The solid agrochemical component described above is preferably 0.1 to 60 parts by mass, more preferably 0.1 to 40 parts by mass, with 100 parts by mass as the total mass of the water-suspendable agrochemical composition claimed in the present invention. It mix | blends in the quantity of a mass part.

  The water-suspendable agricultural chemical composition according to the present invention is an emulsion stabilizer for maintaining the dispersibility and suspendability of the liquid agricultural chemical component and the solid agricultural chemical component, and inhibits the decomposition of the solid agricultural chemical component by the liquid agricultural chemical component. In order to contain at least one fat. Examples of these oils and fats include mineral oils such as spindle oil, machine oil and liquid paraffin, aromatic solvents such as sorbeso and shellsol, vegetable oils such as rapeseed oil, soybean oil, sunflower oil, castor oil, pine oil and cottonseed oil. As well as derivatives of these oils and fats, such as methyl esters and other ester derivatives, epoxidized derivatives, fatty acid esters, which can be used alone or in combination. Particularly preferred fats and oils in the present invention are vegetable oil and liquid paraffin. Such fats and oils are preferably blended in an amount of 0.1 to 30 parts by mass and more preferably 1 to 10 parts by mass with the total mass of the water-suspendable agricultural chemical composition according to the present invention as 100 parts by mass.

  The water-suspendable agricultural chemical composition according to the present invention preferably contains a surfactant. Examples of preferred surfactants include polyoxyethylene / polyoxypropylene block polymer type surfactants such as polyoxyethylene / polyoxypropylene block polymers and alkyl polyoxyethylene / polyoxypropylene block polymer ethers. Polyoxyethylene / polyoxypropylene (POE-POP) block polymer is particularly preferable. The use of the above-mentioned surfactant is preferable because satisfactory emulsification of the liquid pesticide component and satisfactory dispersion of the solid pesticide component can be expected, and further, decomposition of the solid pesticide component by the liquid pesticide component can be inhibited. The above-mentioned surfactant is preferably in an amount of 0.01 to 10 parts by mass, more preferably 0.1 to 5 parts by mass, with 100 parts by mass as the total mass of the water-suspendable agricultural chemical composition according to the present invention. Blended.

  A preferable surfactant is a POE-POP block polymer having an average molecular weight of 10,000 or more and an ethylene oxide mass ratio of 50% or more (for example, Epan U-108; Daiichi Kogyo Seiyaku Co., Ltd.). It is particularly preferred because it can inhibit the occurrence of aggregation under conditions. However, even those having an average molecular weight of 10,000 or less or an ethylene oxide mass ratio of 50% or less can achieve satisfactory emulsification of the liquid active ingredient and inhibit the decomposition of the solid active ingredient. Furthermore, it is possible to obtain a composition having desired physical characteristics by using a plurality of POE-POP block polymers having different average molecular weights or ethylene oxide mass ratios in combination.

  In the water-suspendable agricultural chemical composition according to the present invention, other surfactants can be blended. Examples thereof include polyoxyalkylene tristyrylphenol, polyethylene glycol higher fatty acid ester, polyoxyalkylene alkyl. Ethers, polyoxyalkylene alkyl aryl ethers, polyoxyalkylene aryl phenyl ethers, sorbitan alkylates, acetylene alcohols, acetylenic diols and their alkylene oxide addition products, polyalkylene sorbitan alkylates, polyalkyl glucosides, sucrose fatty acid esters and poly Nonionic surfactants such as alkylene alkyl amines; alkyl aryl sulfonates, dialkyl sulfonates, lignin sulfonates, alkylated or non-alkylated naphthalates Talensulfonate and its condensation products, alkyl sulfates and ester salts, alkyl phosphates and ester salts, alkylaryl sulfates and ester salts, alkylaryl phosphates and ester salts, polyoxyethylene alkyl ether sulfates and ester salts , Anionic surfactants such as polyoxyethylene alkylaryl sulfates and ester salts, polyoxyethylene arylphenyl ether sulfates and ester salts, and polycarboxylic acid type polymer activators; silicone surfactants, fluorine-based interfaces Activators, amphoteric surfactants such as alkylbetaines; and cationic surfactants such as alkylmethylammonium salts and polyoxyalkylenealkylmethylammonium salts. In a preferred embodiment, the water-suspendable agricultural chemical composition according to the present invention contains polyoxyethylene tristyrylphenol as another surfactant. This surfactant is preferably an amount of 0.001 to 10 parts by mass, more preferably 0.01 to 1 part by mass, based on 100 parts by mass of the total mass of the water-suspendable agricultural chemical composition according to the present invention. It is blended with.

In addition to the above-mentioned components, the water-suspendable agricultural chemical composition according to the present invention can contain conventional excipients that are typically used in water-suspendable agricultural chemical compositions. Agents, such as silicone, antifungal agents such as 1,3-benzisothiazolin-3-one and other benzisothiazolinone compounds, pH adjusters such as K ₂ PO ₄ , antifreeze agents such as propylene glycol, thickeners such as There are xanthan gum, silica, bentonite, inert carriers such as clay, diatomaceous earth, calcium carbonate, preservatives, tackifiers, fertilizers, and other active ingredients.

  The water-suspendable agricultural chemical composition according to the present invention can be prepared by a conventional method, for example, by directly mixing the above-mentioned active ingredient with the above-described formulation excipient and liquid or solid carrier and / or grinding them together. Can be used to produce.

  Preferably, the water-suspendable agricultural chemical composition according to the present invention can be prepared as described below.

(A) Composition of Concentrated Grinding Slurry of Solid Pesticide Component A portion of various types of surfactants and other auxiliaries are mixed by dissolving or dispersing in water and then the solid pesticide component is added. Thereafter, the mixture is appropriately wet-ground by a bead mill such as a batch type bead mill to prepare a concentrated slurry.

(B) Composition of emulsion of liquid agrochemical component Various types of surfactants and other auxiliaries are mixed in water. While forcibly stirring with a homogenizer or the like, an oil phase in which fats and oils are dissolved in a liquid agricultural chemical ingredient is added, and the oil phase is emulsified in an aqueous phase. The mixture is then properly forced emulsified until the desired particle size is achieved.

(C) Production of Composition A solid agrochemical component slurry is added to the liquid agrochemical component emulsion (emulsion to slurry ratio is, for example, 9: 1) and mixed appropriately with a mixer or the like to obtain a composition.

  The herbicide according to the underwater suspending agricultural chemical composition according to the present invention is suitable for controlling paddy field weeds under flooded water. This is preferably done by applying the suspending pesticide composition in water according to the present invention directly in the required amount, or by diluting with water to an appropriate concentration and then applying it to the surface, or in the water flowing into the surface. It is carried out by adding (so-called water mouth treatment). Furthermore, the composition based on this invention can also be applied simultaneously with planting by a rice transplanter.

  The water-suspendable agricultural chemical composition according to the present invention can be applied in the same manner as normal spraying, but can also be diluted in a larger amount of water. The water-suspendable agricultural chemical composition according to the present invention is preferably usable at an application rate of 100 to 50,000 ml / ha, and more preferably 1000 to 10,000 ml / ha.

  Hereinafter, the present invention will be described more specifically with specific examples. In addition, this invention is not limited by this.

With the formulations shown in Tables 1 and 2, water-suspended agricultural chemical formulations were prepared as follows.

  In the table, PFT represents pyriftalide and BSM represents bensulfuronmethyl. Moreover, NK-PTC is an emulsifier blend made by Coseal having a POE-POP block polymer as a main component.

(A) Preparation of concentrated pulverized slurry of solid agrochemical component Sopropol BSU (surfactant; manufactured by Rhodia) 0.1 parts by mass, Epan U108 (surfactant; manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), 2.0 parts by mass Agent: 0.1 parts by mass of Rhodia Silicone) and 0.1 part by mass of Road Pole 23 (Thickener: Rhodia Xanthan Gum) were dissolved or dispersed in water, and a solid agrochemical component was added. As the solid agricultural chemical component, bensulfuron methyl (generic name) alone or a combination of bensulfuron methyl and pyriftalide (generic name) was used. Each active ingredient concentration in the slurry was adjusted so that bensulfuron methyl was 15% and pyriftalide was 30%. A concentrated slurry was prepared (10 times the concentration of the preparation) by wet milling at 1000 rpm / 1 hour with a batch type bead mill (4 cylinder sand mill, 1/8 gallon, 1 mm glass beads manufactured by IMEX Co., Ltd.).

(B) Preparation of emulsion of liquid agrochemical component Emulsifier in water (Epan U108 or Epan U103 or Epan U105 or NK-PTC), propylene glycol (freezing agent; Showa Denko) KH ₂ PO ₄ (pH adjuster; Nippon Chemical Industry Co., Ltd.), xanthan gum (thickener; Rhodia Co.), and proxel GXL (1,3-benzisothiazolin-3-one; antifungal agent; manufactured by Arch Chemicals) were mixed. See Table 1 and Table 2 for the amount of each component added. While forcibly stirring with a homogenizer, an oil phase in which fats and oils were dissolved in a liquid pesticide component was added to emulsify the oil phase into an aqueous phase. As the liquid agrochemical component, pretilachlor (generic name), S-metolachlor (generic name), esprocurve (generic name) or prosulfocurve (generic name) was used. Moreover, as oil and fat, soybean oil (made by Hornen Corporation) or liquid paraffin (Moleken White P-70 made by Matsuken) was used. See Table 1 and Table 2 for the amount of each component added. Forcibly emulsified for about 2 minutes to obtain the required particle size.

(C) Preparation of water-suspended pesticide formulation Add a solid pesticide component slurry to the liquid pesticide component emulsion (emulsion: slurry = 9: 1) and use a lab mixer with propeller-type wings attached to the shaft for 5 minutes. The preparation was obtained by mixing.

上記の製剤調整方法に従って調整した農薬製剤約１００ｍｌをガラス容器に密封し４０℃の恒温槽内に静置した。一定期間経過後に農薬製剤をとりだし、高速液体クロマトグラフにより農薬成分含有量を測定した。 Stability test For each water-suspended pesticide formulation prepared as described above, a storage stability test is conducted at 40 ° C, and the presence or absence of decomposition of the agrochemical component in the formulation and generation of oil or cream in the formulation The presence or absence of flocculation or precipitation and the presence or absence of supernatant were monitored over time. The results are shown in Tables 3-6.

About 100 ml of the agricultural chemical preparation adjusted according to the above preparation preparation method was sealed in a glass container and left in a constant temperature bath at 40 ° C. After a certain period of time, the agrochemical formulation was taken out and the agrochemical component content was measured by high performance liquid chromatography.

  About 100 ml of the agricultural chemical preparation adjusted according to the above preparation preparation method was sealed in a glass container and left in a constant temperature bath at 40 ° C. After a certain period of time, the agrochemical preparation was taken out and visually checked for the presence or absence of a supernatant, the presence or absence of separation of oil or cream, and the presence or absence of agglomerates or precipitation, and the degree thereof was measured.

  From the results in the table, it can be seen that by adding fats and oils, the decomposition of the agrochemical component in the preparation can be suppressed, and the separation, aggregation and precipitation of the components in the preparation can also be suppressed.

  The water-suspendable pesticide composition containing the liquid pesticide component and the solid pesticide component according to the present invention ensures good suspension and dispersion of the components, and further, even when stored for a long period of time, decomposition is suppressed, and precipitation and aggregation also occur. It is suppressed.

Claims (19)

  A water-suspendable agricultural chemical composition comprising at least one liquid agricultural chemical ingredient, at least one solid agricultural chemical ingredient, and at least one fat.   The composition according to claim 1, wherein the fat is selected from the group consisting of mineral oil, vegetable oil, fatty acid ester, epoxidized vegetable oil and liquid paraffin.   The composition according to claim 1, comprising at least one nonionic surfactant.   The composition according to any one of claims 1 to 3, wherein the nonionic surfactant is a polyoxyethylene-polyoxypropylene block polymer.   The composition according to any one of claims 1 to 4, wherein the agrochemical component is at least one herbicide.   The composition according to any one of claims 1 to 5, wherein the agrochemical component is at least one insecticide.   The composition according to any one of claims 1 to 6, wherein the agrochemical component is at least one fungicide.   The composition according to any one of claims 1 to 4, comprising at least one fungicide and at least one insecticide as a pesticide ingredient.   The composition according to any one of claims 1 to 5, wherein at least one of the liquid agrochemical components is a chloroacetamide herbicide.   The composition according to claim 9, wherein the chloroacetamide herbicide is pretilachlor.   The composition according to any one of claims 1 to 5 and 9, wherein the chloroacetamide-based herbicide is metolachlor or S-metolachlor.   The composition according to any one of claims 1 to 5 and 9 to 11, wherein at least one of the solid agrochemical components is a sulfonylurea herbicide.   The composition according to claim 12, wherein the sulfonylurea herbicide is bensulfuron methyl.   The composition according to any one of claims 1 to 5 and 9 to 13, further comprising pyriftalide as a solid agricultural chemical component.   15. A method of controlling undesirable vegetation in a crop of useful plants comprising the step of allowing an effective amount of the composition of any one of claims 1-14 to act when control is desired.   The method according to claim 15, wherein the useful plant crop is rice.   Use of the composition according to any one of claims 1 to 14 for controlling grasses and weeds in crops of useful plants.   Use according to claim 11, wherein the crop of useful plants is rice.   The preparation method of the composition of any one of Claims 1-14 by mix | blending fats and oils in the water suspension agricultural chemical composition containing an at least 1 liquid agricultural chemical component and an at least 1 solid agricultural chemical component.