TWI441596B - Water-suspendable agricultural chemical composition - Google Patents

Description

Water-suspended pesticide composition

The present invention relates to a stable, water-suspended pesticide composition comprising at least one liquid pesticide component and at least one solid pesticide component.

Pesticides are classified on the basis of the drug type of the composition, and in particular in the case of pesticides for rice, since their application is for the eradication of pests and unwanted plants such as grasses and weeds in paddy fields. The solid particle system is the main consideration for the consideration of the ability to reliably apply the required amount of pesticides while also saving labor. However, in the example of the granular composition, the problem is that it is not easy to spray the entire field uniformly. In addition, attempts have recently been made to improve work efficiency by using techniques for increasing the size of the particles themselves, which increases the amount of active ingredient (herbicidal active ingredient) and reduces the amount of spray.

On the other hand, in addition to the solid particles, there are also emulsions for pre-transplant treatment, and water-suspended pesticide compositions for post-transplant treatment. The liquid pesticide composition, and particularly the water-suspended pesticide composition, has attracted attention in recent years for reasons such as its ability to reduce environmental burden, ease of handling, and ease of uniform dispersion. However, the water-suspended pesticide composition has, for example, the instability of the active ingredient in the presence of moisture, in the case of mixing two or more active ingredients, and particularly in the case of combining a liquid component and a solid component. The difficulty of uniformly suspending and dispersing all active ingredients, and the sensitivity of the active ingredients to separation, precipitation or aggregation.

In the case of formulating a liquid composition in which two or more active ingredients having different physical properties are mixed, it is necessary to design the composition in order to suppress hydrolysis, precipitation and aggregation of all active ingredients while ensuring proper dispersion, suspension, and active ingredient. Emulsified or a combination thereof. Although adjuvants such as emulsifiers, emulsion stabilizers, and surfactants are often used, there are examples of hydrolysis and aggregation of the active ingredients corresponding to the compatibility between the active ingredients and the adjuvants used. For example, in the formulation of pretilachlor (a herbicide that is liquid at room temperature and based on chloroacetoamide), and bensulfuron-methyl (a type at room temperature) In the case of an aqueous solution composition of a solid and sulfonylurea-based herbicide, in order to suspend and disperse the two active ingredients, it is necessary to use an adjuvant such as an emulsion stabilizer or a surfactant, and the auxiliary of the use Depending on the type of agent, there are still problems such as rapid hydrolysis, precipitation and aggregation.

For example, Japanese Laid-Open Patent Publication No. Hei 10-287503 describes a sulfonylurea-based herbicide as an active ingredient of a pesticide, and/or as a herbicide active ingredient having weed herbicidal activity, having an average degree of polymerization of 2,000 or more. An aqueous suspension composition composed of polyvinyl alcohol having a saponification degree of 69 to 90 mol%, and water having satisfactory composition stability, improved dispersibility, and prevention by preventing adhesion of chemicals on the rice body Chemical damage. Further, Japanese Laid-Open Patent Publication No. Hei 9-183704 describes the addition of a lignosulfonate to provide an aqueous suspension composition comprising a sulfonylurea-based herbicide having excellent long-term storage stability.

The object of the present invention is to provide a water-suspended pesticide composition comprising a liquid pesticide component and a solid pesticide component; wherein dispersion, suspension, emulsification or a combination thereof is ensured; hydrolysis is inhibited, even after storage for a long time And precipitation and aggregation are also inhibited.

As a result of extensive research focusing on the aforementioned problems, the inventors of the present invention have found that the foregoing problems can be solved by mixing oil into a water-suspended pesticide composition comprising at least one liquid pesticide component and at least one solid pesticide component, whereby This leads to the completion of the invention. Accordingly, this application includes the following inventions.

In a first aspect, the present invention provides a water-suspended pesticide composition comprising at least one liquid pesticide component, at least one solid pesticide component, and at least one oil.

In a first embodiment, the invention provides a water-suspended pesticide composition, wherein the oil is selected from the group consisting of mineral oil, vegetable oil, fatty acid esters, epoxidized vegetable oil, and liquid paraffin.

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

In a third embodiment, the present invention provides a water-suspended pesticide composition, wherein the nonionic surfactant is a polyoxyethylene-polyoxypropylene block polymer.

In a fourth embodiment, the invention provides a water-suspended pesticide composition, wherein the liquid or solid pesticide component is at least one herbicide.

In a fifth embodiment, the invention provides a water-suspended pesticide composition, wherein the liquid or solid pesticide component is at least one insecticide.

In a sixth embodiment, the invention provides a water-suspended pesticide composition, wherein the liquid or solid pesticide component is at least one bactericide.

In a seventh embodiment, the present invention provides a water-suspended pesticide composition comprising at least one bactericide and at least one insecticide as a pesticide component.

In an eighth aspect, the present invention provides a water-suspended pesticide composition, wherein at least one of the liquid pesticide components is a chlorhexidine-based herbicide.

In a ninth embodiment, the present invention provides a water-suspended pesticide composition, wherein the herbicide based on chlorhexidine is prasupium.

In a tenth aspect, the present invention provides a water-suspended pesticide composition, wherein the chlorhexidine-based herbicide is Modoc with S-Molachlor.

In an eleventh aspect, the present invention provides a water-suspended pesticide composition, wherein at least one of the solid pesticide components is a sulfonylurea-based herbicide.

In a twelfth aspect, the present invention provides a water-suspended pesticide composition, wherein the sulfonylurea-based herbicide is bensulfuron-methyl. In a thirteenth aspect, the present invention provides a water-suspended pesticide composition further comprising cyclic ester grass as a solid pesticide component.

In a second aspect, the present invention provides a method of controlling unwanted plants in a useful plant crop, particularly a rice crop, comprising applying an effective amount of a water-suspended pesticide composition to a desired control. In a third aspect, the invention provides the use of a water-suspended pesticide composition for controlling grasses and weeds in useful plant crops, particularly in rice crops.

In a fourth aspect, the present invention provides a method of preparing a pesticide composition by mixing oil into a water-suspended pesticide composition comprising at least one liquid pesticide component and at least one solid pesticide component.

According to the present invention, in a water-suspended pesticide composition comprising at least one liquid pesticide component and at least one solid pesticide component, dispersion, suspension, emulsification or a combination of the above components is ensured; hydrolysis is inhibited, even stored After a long time; and precipitation and aggregation are also inhibited.

The present invention provides a water-suspended pesticide composition comprising at least one liquid pesticide component, at least one solid pesticide component, and at least one oil.

The liquid pesticide component which can be used for the water-suspended pesticide composition as claimed in the present invention is not particularly limited as long as they are in a composition or a spray at a normal temperature and a normal pressure such as a production temperature of the composition, Or, depending on the special case, it is a glassy, oily or liquid pesticide component at a temperature of about 50 °C. Typical examples include chlorhexidine-based compounds such as prasin, a carbamate-based compound, and a dinitroaniline-based compound. Further, components which are commonly used in agricultural chemical compositions and which are oily when pure are also included in the liquid agricultural chemical component of the present invention, even if they are solid at room temperature in a pure form. The pesticide component can be, for example, a herbicide, a bactericide, a fungicide, a nematicide, a parasiticidal or other biocide. The liquid pesticide component is preferably a herbicide, an insecticide, a bactericide or an insecticide/fungicide, and particularly preferably a herbicide.

Examples of liquid herbicides include, but are not limited to, praline (656), mometas (548), prodiamine (661), esprocarb (303), and benzathine ( Prosulfocarb) (683), triclopyr (827), fluazifop (681), orbencarb (595), mol (molar) (560), Dimeti (dimetinamide) (260), citric acid (583), dalapon (214), piperophos (560), sulfaphos (butamiphos) (102), gamma phosphate trimethyl sulphate (glyphosate trimesium) (419), sethoxydim (726), clethodim (153), S-momoda (549), and cinmethylin (153). In the present invention, the chloramphenicol-based herbicides prasacetea (656) and mometas (548) are preferred, and more preferably prasin. These compounds and their agronomically acceptable salts are described, for example, in the "The e-Pesticide Manual" version 3.1, edited by Ed. CDC Tomlin at the British Grain Protection Conference in 2004-2005.

Examples of liquid insecticides include, but are not limited to, cyanophos (184), fenthion (346), fenitrothion (335), and deichlofenthion (1051). , pirimiphos-methyl (1345), diazinon (227), isoxathion (480), oxydeprofos (1324), marathion, Phenothoate (631), formothion (1192), thiometon (801), disulfoton (278), prothiophos (686), Sulprofos (1408), propenofos, pyraclofos (689), dichlorvos (236), naled (657), chlorfenvinphos (131), propaphos (1356), isofenphos (1236), ethion (309), butyl plus carbosulfan (119), nocturnal (benfuracarb) (60), allethrin (17), permethrin (626), cyhalothrin (196), cyfluthrin (193), Fenhuali ( Fenvalerate) (349), flucythrinate (367), fluvalinate (1184) Cycloprothrin (188), silafluofen (728), propargite (671), halfenprox (424), ethoprophos (312) , and fosthiazate (408). These compounds and their agronomically acceptable salts are described, for example, in the "Thee-Pesticide Manual" version 3.1, edited by Ed. CDC Tomlin at the British Grain Protection Conference in 2004-2005.

Examples of other liquid pesticide ingredients include liquid bactericides, and particularly fungicides such as calcium polysulfide (111), ediphenfos (290), propiconazole (675), and rice glutamine ( Pefurazoate) (618), pyrifenox (703), tetraconazole (778), echlomezole (321), dinocap (270), and dextromethorphan ( Metalaxyl M) (516). These compounds and their agriculturally acceptable salts are described, for example, in the "The e-Pesticide Manual" version 3.1, edited by Ed. CDC Tomlin at the British Grain Protection Conference in 2004-2005.

The liquid pesticide component as claimed in the present invention is particularly preferably one which has low water solubility, for example, water solubility of 1000 mg/liter or less at normal temperature and normal pressure, and preferably 500 mg/liter or less. Examples of such liquid pesticide ingredients include praline grass (water solubility: 50 mg/liter), mometa (water solubility: 488 mg/liter), ambroxol (water solubility: 0.013 mg/liter), valerian Dan (water solubility: 4.9 mg/l), benzathion (water solubility: 13.2 mg/l), and dextromethorphan (water solubility: 26 mg/l).

The liquid pesticide component is preferably mixed in an amount of 0.1 to 60 parts by weight, and more preferably 5 to 40 parts by weight, based on 100 parts by weight of the total of the water-suspended pesticide composition as claimed in the present invention.

The solid pesticide component which can be used in the water-suspended pesticide composition as claimed in the present invention is not particularly limited as long as they are solid in the composition or the spray at normal temperature and normal pressure such as the production temperature of the composition. Pesticide composition. Typical examples of such ingredients include compounds based on sulfonylurea. The pesticide component can be, for example, a herbicide, an insecticide, a bactericide, a fungicide, a nematicide, a parasiticidal, and other biocides. The liquid pesticide component is preferably a herbicide, an insecticide, a bactericide or an insecticide/bactericide, and is particularly preferably a herbicide.

Examples of solid herbicides include, but are not limited to, free radicals (64), CNP (974), naproanilide (517), bifenox (75), pyributicarb (698). , bromobutide (93), mefenacet (505), daimuron (213), imazoSulfuron (456), pyrazoSulfuron-ethyl (694), simetryn (732), prometryn (666), dimethametryn (259), chlomethoxynil, oxadiazon (600) ), pyrazolate (692), pyrazoxyfen (695), clomeprop (160), benzofenap (70), thenyl chloride (789), Oxaziclomefone (604), pentoxazone (625), cafenstrole (110), azirsulfuron (43), pyriclofen (pyriminobac) -methyl) (707), fentrazamide (348), and bispyribac-sodiu m salt (82). In the present invention, the sulfonylurea-based herbicide free-speed (64) is particularly preferred. These compounds and their agronomically acceptable salts are described, for example, in the "The e-Pesticide Manual" version 3.1, edited by Ed. CDC Tomlin at the British Grain Protection Conference in 2004-2005.

Examples of solid insecticides include, but are not limited to, imidacloprid (458), dinotefuran (27l), thiamethoxam (792), acetamiprid (4). , thiacloprid (791), nitenpyrm (579), NAC (115), pyridaphenthion (701), chlorpyrifos-methyl (146), annihilation Dimethoate (262), acephate (2), cartap (123), thiocyclam (798), benzultap (66), and buffing (buprofezin) (99). These compounds and their agronomically acceptable salts are described, for example, in the "The e-Pesticide Manual" version 3.1, edited by Ed. CDC Tomlin at the British Grain Protection Conference in 2004-2005.

Examples of solid biocides, and particularly solid fungicides, include, but are not limited to, cyprodini (208), mepanipyrim (508), pyrimethanil (705), and halal. (516), mepronil (510), flutolanil (396), tecloftalam (766), pencycuron (620), diclomezine (239) ), triflumizole (834), kasugamycin (483), validamycin (846), probenazole (658), isoprothiolane (474) ), cyproconazole (207), metconazole (525), tricyclazole (828), pyroquilon (710), oxolinic acid (oxolinic acid) 616), ferimzone (351), iprodione (470), triforine (838), picoxystrobin (647), and azoxystrobin (47), kresoxim-methyl (485), oressastrobin, pyraclostrobin (690), trifloxystrobin (832), and methotrexate (metominostrobin) ) (551). These compounds and their agronomically acceptable salts are described, for example, in the "Thee-Pesticide Manual" version 3.1, edited by Ed. CDC Tomlin at the British Grain Protection Conference in 2004-2005.

The solid pesticide component is preferably mixed in an amount of 0.1 to 60 parts by weight, and more preferably 0.1 to 40 parts by weight, based on 100 parts by weight of the total of the water-suspended pesticide composition as claimed in the present invention.

The water-suspended pesticide composition as claimed in the present invention contains at least one oil as an emulsion stabilizer for maintaining the dispersibility and suspension of the liquid pesticide component and the solid pesticide component, and inhibiting the solid pesticide component through the liquid pesticide component break down. Examples of such oils include mineral oils such as spindle oils, motor oils and liquid paraffin; aromatic solvents such as Solvesso and Shellsol; vegetable oils such as rapeseed oil, soybean oil, sunflower oil, castor oil, pine oil, and cotton seeds. Oils; and derivatives of these oils, such as methyl esters and other ester derivatives, epoxidized derivatives, and fatty acid esters, and these may be used singly or in combination. Particularly preferred oils in the present invention are vegetable oils and liquid paraffin waxes. The oil system is preferably mixed in an amount of 0.1 to 30 parts by weight, and more preferably 1 to 10 parts by weight, based on 100 parts by weight of the total of the water-suspended pesticide composition as claimed in the present invention.

The surfactant is preferably included in the water-suspended pesticide composition as claimed in the present invention. Examples of preferred surfactants include surfactants of polyoxyethylene-polyoxypropylene block polymers, such as polyoxyethylene-polyoxypropylene block polymers and alkyl polyoxyethylene-polyoxypropylene blocks. Polymeric ethers, and polyoxyethylene-polyoxypropylene (POE-POP) block polymers are especially preferred. The use of the aforementioned surfactant is preferred because it not only enables the emulsification of the liquid pesticide component which is expected to be satisfactory, but also the dispersion of the satisfactory solid pesticide component, and also inhibits the decomposition of the solid pesticide component by the liquid pesticide component. . The surfactant is preferably mixed in an amount of 0.01 to 10 parts by weight, and more preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the total of the water-suspended pesticide composition as claimed in the present invention.

Preferred surfactants are POE-POP block polymers, and those having an average molecular weight of 10,000 or more and an ethylene oxide weight ratio of 50% or more (e.g., Epan U-108, Daiichi Kogyo Seiyaku) are preferred. This is especially preferred because they inhibit aggregation from occurring under severe test conditions. However, even those having an average molecular weight of 10,000 or less, or an ethylene oxide weight ratio of 50% or less can achieve satisfactory emulsification of the liquid active ingredient and inhibit decomposition of the solid active ingredient. In addition, the combination of a plurality of POE-POP block polymers having different average molecular weights or different ethylene oxide weight ratios makes it possible to obtain a composition having desired physical properties.

Other surfactants may also be incorporated into the water-suspended pesticide composition as claimed in the present invention, examples of which include nonionic surfactants such as polyoxyalkylene tristyrene phenol, polyethylene glycol higher fatty acid esters, polyoxygenation. Alkyl ether, polyoxyalkylene alkyl aryl ether, polyoxyalkylene aryl phenyl ether, sorbitan alkylate, acetylenic alcohol, acetylene glycol and alkylene oxide addition product thereof, polyalkylene Alkyl sorbitan alkylate, polyalkyl glucoside, sucrose fatty acid ester, and polyalkylene alkylamine; anionic surfactant, such as alkyl aryl sulfonate, dialkyl sulfonate, wood Quality sulfonate, alkylated or unalkylated naphthalene sulfonate and condensation products thereof, alkyl sulfates and esters, alkyl phosphates and esters, alkyl aryl sulfates and esters, alkyl aryl Phosphate and ester salts, polyoxyethylene alkyl ether sulfates and ester salts, polyoxyethylene alkyl aryl sulfates and ester salts, polyoxyethylene aryl phenyl ether sulfates and ester salts, and polycarboxylic acids a polymer activating agent; an amphoteric surfactant, such as a siloxane based surfactant, Fluorine-based surfactant, and alkylbetaines; and a cationic surfactant, such as alkyl ammonium salts and polyoxyalkylene alkyl ammonium salts. In a preferred aspect, the water-suspended pesticide composition as claimed in the present invention contains polyoxyethylene tristyrene phenol as another surfactant. The surfactant is preferably mixed in an amount of 0.001 to 10 parts by weight, and more preferably 0.01 to 1 part by weight, based on 100 parts by weight of the total of the water-suspended pesticide composition as claimed in the present invention.

In addition to the foregoing ingredients, the water-suspended pesticide composition as claimed in the present invention may also contain conventional excipients which are typically used in water-suspended pesticide compositions, examples of which include antifoaming agents such as hydrazine. Oxane; an antifungal agent such as 1,3-benzisothiazolin-3-one and other benzisothiazolinone compounds; a pH adjusting agent such as K ₂ PO ₄ ; an antifreezing agent such as propylene glycol; thickening Agents such as Sanxian gum, alumina, and bentonite; inert carriers such as clay, diatomaceous earth, and calcium carbonate; preservatives; binders; fertilizers; and other active ingredients.

The water-suspended pesticide composition as claimed in the present invention can be produced by a usual method, for example, by directly mixing the aforementioned active ingredient with the aforementioned mixed excipient and liquid or solid carrier, and/or crushing it together.

Preferably, the water-suspended pesticide composition as claimed in the present invention can be prepared by the method described below.

(a) Concentrated crushed pulp composition of solid pesticide component A variety of surfactants and other auxiliaries are mixed by dissolving or dispersing in water, followed by addition of a solid pesticide component. The mixture is then suitably wet-crushed in a bead mill such as a batch bead mill to prepare a concentrated slurry.

(b) Emulsion composition of liquid pesticide component Various surfactants and other auxiliary agents are mixed in water. An oil phase in which the oil has been dissolved is added to the liquid pesticide component while being vigorously stirred by a homogenizer, and the oil phase is emulsified in the water phase. The mixture is then suitably emulsified to the desired particle size.

(c) Production of Composition The solid pesticide composition slurry is added to the liquid pesticide component emulsion (the ratio of the emulsion to the slurry is, for example, 9:1), and then appropriately mixed with, for example, a mixer to obtain a composition.

The herbicide according to the water-suspended pesticide composition as claimed in the present invention is preferably used for controlling weeds in rice fields when in water. Preferably, the water-suspended pesticide composition as claimed in the present invention is applied directly to the rice field by direct application, or directly after dilution with water to an appropriate concentration, or by addition to the inflowing rice field. It is carried out in water (so-called "spout treatment"). Furthermore, the compositions as claimed in the present invention can also be applied to the seeding simultaneously by means of a seed drill.

Although the water-suspended pesticide composition as claimed in the present invention can be applied by the usual method in the same manner, it can be diluted in a large amount of water. The water-suspended pesticide composition as claimed in the present invention may preferably be applied in an amount of from 100 to 50,000 ml/ha, and more preferably from 1,000 to 10,000 ml/ha.

A more detailed explanation of the invention is provided below via its examples. Further, the invention is not limited by the embodiments.

EXAMPLES: A water-suspended pesticide composition was prepared as shown in the following Tables 1 and 2.

In the table, PFT stands for cyclic ester grass and BSM stands for free speed. Further, the NK-PTC is an emulsifier mixture manufactured by Coseal having a POE-POP block polymer as a main component.

(a) Concentrated crushed pulp composition of solid pesticide component 0.1 parts by weight of Sopropore BSU (surfactant, Rhodia), 2.0 parts by weight of Epan U108 (surfactant, Daiichi Kogyo Seiyaku), 0.1 part by weight of Rhodosil 454 (antifoaming agent) Rhodia, a mixture of 0.1 parts by weight of Rhodopore 23 (thickener, Rhodia, Sanxian gum) by dissolving or dispersing in water, followed by the addition of a solid pesticide component. Separate use of speed-free (common name) or a combination of free-speed and cyclohexyl ether (common name) in solid pesticide ingredients. The concentration of each active ingredient in the slurry was adjusted to 15% for the speed-free and 30% for the cyclic ester. The concentrated slurry was prepared by wet crushing using a 1000 rpm/hr batch bead mill (Imex, four cylinder sanding, 1/8 gallon, using 1 mm glass sphere) (10 times concentrated composition).

(b) Emulsion composition emulsion of liquid pesticide ingredients (Epan U108, Epan U103, Epan U105 or NK-PTC), propylene glycol (antifreeze, Showa Denko), KH ₂ PO ₄ (pH adjuster, Nippon Kayaku), Sanxian Gum (thickener, Rhodia), and Proxel GXL (1,3-benzisothiazolin-3-one, anti-fungal agent, Arch Chemicals) were mixed into water. Refer to Tables 1 and 2 for the addition amount of each component. An oil phase in which the oil has been dissolved is added to the liquid pesticide component while being vigorously stirred by a homogenizer, and the oil phase is emulsified in the water phase. Prassica (common name), S-Modoc (common name), pentosan (common name) or benzathine (common name) are used as liquid pesticide ingredients. In addition, soybean oil (Honen Corporation) or liquid paraffin (Matsuken, Moresco White P-70) was used as the oil. Refer to Tables 1 and 2 for the addition amount of each component. The emulsion was vigorously emulsified for about 2 minutes to give the desired particle size.

(c) Production of a water-suspended pesticide composition A solid pesticide composition slurry is added to a liquid pesticide ingredient emulsion (emulsion to slurry ratio of 9:1), followed by a screw-suspended stirring blade attached to the handle The laboratory mixer was mixed for 5 minutes to obtain a composition.

Stability test

The storage stability test was carried out at 40 degrees Celsius on each of the water-suspended pesticide compositions prepared in the above manner to trace the decomposition of the pesticide component in the pesticide composition, the oil fraction or the emulsion. (cream fraction) Whether or not the occurrence, aggregation or precipitation occurs, and whether or not the supernatant is produced over time. Those results are shown in Tables 3 through 6.

About 100 ml of the pesticide composition prepared according to the above composition method was sealed in a glass container and kept undisturbed in a constant temperature bath at 40 °C. After a predetermined period of time, the pesticide composition is removed from the bath, followed by measurement of the pesticide content by high performance liquid chromatography.

About 100 ml of the pesticide composition prepared according to the above composition method was sealed in a glass container and kept undisturbed in a constant temperature bath at 40 °C. After a predetermined period of time, the pesticide composition is removed from the bath, followed by visual confirmation of the presence or absence of the supernatant, the presence or absence of oil or milk separation, and the presence or absence of aggregation or precipitation, as well as various The measure of the extent.

Based on the results shown in the table, the mixing of the oil was judged not only to suppress the separation of the pesticide component in the composition, but also to suppress the separation, aggregation and precipitation of the components in the composition.

The water-suspended pesticide composition according to the present invention, which comprises a liquid pesticide component and a solid pesticide component, ensures satisfactory suspension or dispersion of the components contained therein, and avoids their decomposition, and also inhibits their precipitation and Gathered, even after storage for a long time.

Claims (11)

A water-suspended pesticide composition comprising, in total 100 parts by weight, a liquid pesticide component present in an amount of 0.1 to 60 parts by weight; a solid pesticide component present in an amount of 0.1 to 60 parts by weight; and 0.1 to 30 parts by weight An oil; and a polyoxyethylene-polyoxypropylene block polymer present in an amount of 0.01 to 10 parts by weight; wherein the polyoxyethylene-polyoxypropylene block polymer has an average molecular weight of 10,000 Daltons or more And an ethylene oxide having a weight ratio of 50% or more; wherein the liquid pesticide component is selected from the group consisting of pretilachlor, metolachlor, prodiamine, and esprocarb ), prosulfocarb, triclopyr, fluazifop, orbencarb, molinate, dimetinamide, citric acid, thatch (dalapon), piperophos, butamiphos, glyphosate trimesium, sethoxydim, clethodim, S-modoca And cinmethylin; the solid pesticide component is selected from the group consisting of bensulfuron-m Ethyl), imazosulfuron, pyrazosulfuron-ethyl, and azilsulfuron; and the oil is selected from the group consisting of vegetable oils and liquid paraffin. The composition of claim 1, wherein the oil is selected from the group consisting of soybeans and liquid paraffin. The composition of claim 1 or 2, wherein the liquid pesticide component is selected from the group consisting of praline grass, S -momoda, pentosan and benzathine. The patentable scope of application of the composition according to item 1, wherein the liquid pesticidal ingredient is selected from grass Michel, S - MO grass, pentyl prosulfocarb and prosulfocarb; the content of solid pesticide Free Long speed: and the oil-based Selected from soybeans and liquid paraffin. The composition of claim 1, item 2 or item 4 further comprising pyrifalid as a solid pesticide component. The composition of claim 3, which further comprises cyclic ester grass as a solid pesticide component. A method of controlling an unwanted plant in a useful plant crop, comprising causing an effective amount of the composition of any one of claims 1 to 6 to be applied to a place to be controlled. The method of claim 7, wherein the useful plant crop is rice. Use of a composition according to any one of claims 1 to 6 for controlling grasses and weeds in useful plant crops. The use of the ninth aspect of the patent application, wherein the useful plant crop is rice. A method of preparing a composition according to any one of claims 1 to 6, which comprises mixing an oil into a water-suspended pesticide composition comprising a liquid pesticide component and a solid pesticide component.