JP2001328907A - Water-based herbicidal composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-based herbicidal composition that can suppress the decomposition of the active ingredients in low levels for a long period of time and has high pharmaceutical stability. SOLUTION: This water-based herbicidal composition comprises (a) slightly water-soluble herbicidal component, (b) readily water-soluble herbicidal active ingredient, (c) at least one selected from nonionic surfactants and anionic surfactants, (d) an anionic water-soluble polymer, (e) slightly water-soluble organic solvent and (f) water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an aqueous herbicidal composition.

[0002]

2. Description of the Related Art At present, many herbicides are used for arable land or non-agricultural land. However, there are many types of weeds to be controlled, and a single herbicidally active compound is used. Since it is difficult to control various kinds of weeds, a mixture of a plurality of active compounds is often used. In particular, easily water-soluble herbicides represented by glyphosate salts and glufosinate salts,
An excellent herbicide as a non-selective herbicide, but generally requires a long time to develop herbicidal effects. In recent years, a herbicidal composition that has been given a rapid effect by mixing with a protoporphyrinogen oxidase-inhibiting herbicide has been provided. An article has been proposed (JP-A-5-208904).

[0003] On the other hand, liquid preparations, especially aqueous preparations, are more desirable preparations for users than solid preparations, for example, in terms of simplicity of preparation measurement at the time of spraying pesticides, and are particularly used on large-scale farms and the like. This formulation form is particularly used in a system (bulk delivery system) for preparing a pesticide spray liquid by connecting a pesticide formulation tank and a water tank to a pesticide spray (diluting) liquid tank by fixed piping. Further, the easily water-soluble herbicide is often used as an aqueous preparation in general because of its high water solubility. However, for example, the protoporphyrinogen oxidase-inhibiting herbicide is generally easily degraded in an aqueous preparation, and further contains a water-soluble herbicide and a protoporphyrinogen oxidase-inhibiting herbicide. The formulation stability (emulsion stability, suspension stability, etc.) of the formulation is also unsatisfactory, and there has been a demand for an aqueous formulation with low compound degradability and higher formulation stability. The object of the present invention is
An object of the present invention is to provide an aqueous herbicidal composition containing a water-soluble herbicidally active ingredient and a poorly water-soluble herbicidally active ingredient, in which the decomposition of the active ingredient is suppressed to a low level over a long period of time and the preparation stability is high.

[0004]

Under these circumstances, the present inventors have conducted intensive studies and, as a result, have arrived at the present invention. That is, the present invention relates to (a) a poorly water-soluble herbicidal active ingredient, (b) a water-soluble herbicidal active ingredient, (c) at least one selected from a nonionic surfactant and an anionic surfactant, and (d) an anionic surfactant. The present invention relates to an aqueous herbicide composition (hereinafter, referred to as the present composition) containing a water-soluble polymer, (e) a poorly water-soluble organic solvent, and (f) water.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The poorly water-soluble herbicidal active ingredient in the present composition has a water solubility at 20 ° C. of 10 g / L or less. As a poorly water-soluble herbicidal active ingredient (hereinafter, referred to as a poorly water-soluble active ingredient) used in the present composition, typically, a protoporphyrinogen oxidase-inhibiting herbicidal active ingredient (hereinafter, referred to as a PPO active ingredient) may be mentioned. it can. The PPO active ingredient is a herbicidal active ingredient which exerts herbicidal activity by inhibiting protoporphyrinogen oxidase enzyme.

Specific examples of such a PPO active ingredient include pyridazinone compounds having a 2-phenylpyridazin-3-one skeleton, imide compounds having an N-phenyltetrahydrophthalimide skeleton, and 1-phenylpyrimidine-2,6. Uracil-based compounds having a dione skeleton, diphenyl ether-based compounds, and the like. More specifically, examples of such an imide compound include:
Pentyl [2-chloro-5- (cyclohex-1-ene-1,2-dicarboximide) -4-fluorophenoxy] acetate (general name: full microlacpentyl), N- (7-fluoro-3,4 -Dihydro-3-oxo-4- (2-propynyl) -2H-1,4-benzoxazin-6-yl) cyclohex-1-ene-1,2
-Dicarboximide (generic name: flumioxazine), ethyl 2-chloro-3- [2-chloro-5- (1,3-
Dioxo-4,5,6,7-tetrahydroisoindoline-2-yl) phenyl] acrylate (generic name: sinidoneethyl); such pyridazinone-based compounds include ethyl 2-chloro-4-fluoro-5- (5- Methyl-6-oxo-4-trifluoromethyl-1,6-
Dihydropyridazin-1-yl) phenoxyacetate, methyl [2-chloro-4-fluoro-5 [(tetrahydro-3-oxo-1H, 3H- [1,3,4] thiadiazolo [3,4-a] pyridazine- 1-ylidene)
Amino] phenylthio] acetate (generic name: furthiacet-methyl);
1-allyloxycarbonyl-1-methylethyl 2-chloro5- (3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-dihydro-2H-pyrimidine-
1-yl) -benzoate (generic name: butaphenacyl);
O- [5- (2-chloro-α, α, α-trifluoro-
p-tolyloxy) -2-nitrobenzoyl] -DL-
Lactate (lactophen), methyl 5- (2,4-
Dichlorophenoxy) -2-nitrobenzoate (generic name: bifenox), ethyl α, 2-dichloro-5
-[4- (difluoromethyl) -4,5-dihydro-3
-Methyl-5-oxo-1H-1,2,4-triazol-1-yl] -4-fluorobenzeneporopanoate (carfentrazone-ethyl); N- [2,4 -Dichloro-5- [4- (difluoromethyl) -4,5-dihydro-3-methyl-5-
Oxo-1H-1,2,4-triazol-1-yl]
Phenyl] methanesulfonamide (generic name: sulfentrazone), ethyl 2-chloro-5- (4-chloro-
5-difluoromethoxy-1-methylpyrazole-3-
Yl) -4-fluorophenoxyacetate (generic name:
Pyraflufen-ethyl), 2- [2,4-dichloro-5
-(2-propynyloxy) phenyl] -5,6,7,
8-tetrahydro-1,2,4-triazolo [4,5-
a] Pyridin-3 (2H) -one (generic name: azaphenidin) and the like.

One or more types of poorly water-soluble active ingredients can be used, and usually 0.1 to 30 in the present composition.
%, Preferably 0.3 to 20% by weight.

[0008] The water-soluble herbicidal active ingredient (hereinafter referred to as a water-soluble active ingredient) in the present composition has a water solubility at 20 ° C of 100 g / L or more. Specific examples of such herbicidal active ingredients include, for example, N- (phosphonomethyl) glycine (generic name: glyphosate) and DL-homoalanin-4-yl (methyl) phosphinic acid (generic name:
Glyphosinate), 4- [hydroxy (methyl) phosphinoyl] -L-homoalanyl-L-alanyl-L-
Amino acid-based herbicidally active ingredients such as agriculturally acceptable salts such as alanine (general name: bialaphos); and 3-isopropyl-1H-2,1,3-benzothiadiazine-
4 (3H) -one 2,2-dioxide (generic name: bentazone), 3,6-dichloropicolinic acid (generic name: clopyralide), 2,4-dichlorophenoxyacetic acid (generic name: 2,4-D) , 3,6-dichloro-2-methoxybenzoic acid (generic name: dicamba), 2- (2,4-dichlorophenoxy) propionic acid (generic name: sicicloprop), (4-chloro-2-methylphenoxyacetic acid) (Generic name: MCPA), 4- (4-chloro-O-tolyloxy) butyric acid (generic name: MCPB), 2- (4-chloro-2)
And agriculturally acceptable salts such as -methylphenoxy) propionic acid (generic name: mecoprop) and 4-amino-3,5,6-trichloropicolinic acid (generic name: picloram). Examples of agriculturally acceptable salts include sodium salts, ammonium salts, isopropyl ammonium salts, trimesium salts, potassium salts and the like.

The water-soluble active ingredient may be one or more of these.
More than one species can be used, and usually 1
The content is 5 to 80% by weight, preferably 25 to 65% by weight, more preferably 30 to 60% by weight.

[0010] As the surfactant in the composition, at least one surfactant selected from nonionic surfactants and anionic surfactants is used. As the nonionic surfactant, a sugar ester type nonionic surfactant, a fatty acid ester type nonionic surfactant,
Vegetable oil type nonionic surfactant, alcohol type nonionic surfactant, alkylphenol type nonionic surfactant, polyoxyethylene / polyoxypropylene block polymer type nonionic surfactant, bisphenol type nonionic surfactant, polyaromatic Examples include a ring-type nonionic surfactant, a silicon-type nonionic surfactant, and a fluorine-type nonionic surfactant. Examples of the sugar ester type nonionic surfactant include sorbitan fatty acid ester, polyoxyethylene sorbitan aliphatic ester, and sucrose fatty acid ester. Examples of the fatty acid ester type nonionic surfactant include polyoxyethylene fatty acid esters, polyoxyethylene resin acid esters, and polyoxyethylene fatty acid diesters. Examples of the vegetable oil type nonionic surfactant include polyoxyethylene castor oil and polyoxyethylene hydrogenated castor oil. Examples of the alcohol type nonionic surfactant include polyoxyethylene alkyl ether. Examples of the alkylphenol-type nonionic surfactant include polyoxyethylene alkyl phenyl ether, polyoxyethylene dialkyl phenyl ether, polyoxyethylene alkyl phenyl ether / formalin condensate, and the like. Polyoxyethylene ・
Examples of the polyoxypropylene block polymer type nonionic surfactant include polyoxyethylene / polyoxypropylene block polymer, alkyl polyoxyethylene / polyoxypropylene block polymer ether,
Alkyl phenyl polyoxyethylene / polyoxypropylene block polymer ethers and the like can be mentioned. Examples of the bisphenol-type nonionic surfactant include polyoxybisphenyl ether. Examples of the polyaromatic ring type nonionic surfactant include polyoxyalkylene benzyl phenyl ether and polyoxyalkylene styryl phenyl ether. Examples of the silicon type nonionic surfactant include a polyoxyethylene ether type silicon type surfactant, a polyoxyethylene ester type silicon type surfactant, and the like.

Examples of the anionic surfactant include a sulfate-type anionic surfactant, a sulfonate-type anionic surfactant, and a phosphate-type anionic surfactant. Examples of the sulfate-type anionic surfactant include alkyl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, polyoxystyryl phenyl ether sulfate, and polyoxyethylene / polyoxypropylene block polymer sulfate. Examples of the sulfonate type anionic surfactant include paraffin sulfonate, dialkyl sulfosuccinate, alkylbenzene sulfonate, monoalkyl naphthalene sulfonate, dialkyl naphthalene sulfonate, naphthalene sulfonate / formalin condensate, alkyl diphenyl ether Disulfonate, lignin sulfonate, polyoxyethylene alkyl phenyl ether sulfonate and the like can be mentioned. Examples of the phosphate type anionic surfactant include polyoxyethylene alkyl ether phosphate, polyoxyethylene monoalkyl phenyl ether phosphate, polyoxyethylene dialkyl phenyl ether phosphate, polyoxyethylene styryl phenyl ether phosphate, and polyoxyethylene. -Polyoxypropylene block polymer phosphate, alkyl phosphate and the like.

In the present composition, the use of an anionic surfactant is preferred in terms of storage stability, and among the anionic surfactants, a sulfate-type anionic surfactant is preferred. Further, among these, alkoxysulfate-type anionic surfactants, alkylsulfate-type anionic surfactants, and alkoxyalkylsulfate-type anionic surfactants are preferable, and in particular, alkylsulfate-type anionic surfactants having 10 to 14 carbon atoms. Agents are preferred. When a nonionic surfactant is used in the present composition, an aliphatic alcohol-type nonionic surfactant is preferable in terms of herbicidal effect, more preferably an aliphatic alcohol ethoxylate, and particularly preferably an aliphatic alcohol. Polyglycol ether is preferred. These nonionic and / or anionic surfactants are usually contained in the present composition in an amount of 0.1 to 30% by weight, preferably 1 to 20% by weight, more preferably 3 to 30% by weight.
-10% by weight.

The anionic water-soluble polymer in the present composition usually contains a sulfonic acid group, a carboxylic acid group,
It has at least one or more functional groups selected from a phosphoric acid group, a boric acid group, and a sulfate group, and these functional groups are dissociated acids, non-dissociated acids, or salts of the anionic water-soluble group. Present in the molecule. Among the anionic water-soluble polymers in the present invention, those having a carboxylic acid group are particularly preferred.

The anionic water-soluble polymer in the present composition includes those having a saccharide structure in the main chain structure,
Those containing an alkyl structure can be mentioned, among which those having a sugar structure, that is, polysaccharides are particularly preferably used. Examples of such anionic water-soluble polymers include gum arabic, xanthan gum, locust gum, alginic acid, salts of alginic acid, carboxymethylcellulose, salts of carboxymethylcellulose, and lignin sulfonate.

The molecular weight of the anionic water-soluble polymer in the present composition can be used in a pharmaceutically acceptable range, but is generally in the range of 2,000 to 1,000,000, preferably 10,000 to 100,000. It is. From the viewpoint of handleability, the viscosity of the anionic water-soluble polymer in the present composition is usually 10,000 mPa · s or less, preferably 50 m 2, as a 1% aqueous solution at 20 ° C.
00 mPa · s or less. The anionic water-soluble polymer is usually contained in the present composition in an amount of 0.1 to 20% by weight,
Preferably from 0.5 to 10% by weight, more preferably from 1 to 5% by weight.
% By weight.

The poorly water-soluble solvent used in the present composition usually has a water solubility at 20 ° C. of 10 g / L or less.
Specific examples thereof include aromatic solvents, animal and vegetable oil solvents, paraffin solvents, ester solvents and the like.

Examples of the aromatic solvent include xylene, alkylbenzene, and alkylnaphthalene, and examples of the animal and vegetable oils include rapeseed oil, soybean oil, and linseed oil. Examples of the paraffin-based solvent include normal paraffins having 5 or more carbon atoms, isoparaffins having 5 or more carbon atoms, cycloparaffins having 5 or more carbon atoms, and preferably normal paraffins having 5 to 70 carbon atoms, Examples include isoparaffins having about 5 to 200 carbon atoms and cycloparaffins having about 5 to 200 carbon atoms, and more preferably 5 to 200 carbon atoms.
Examples thereof include normal paraffin of about 45, isoparaffin of about 5 to 100 carbon atoms, and cycloparaffin of about 5 to 100 carbon atoms.

The poorly water-soluble solvent in the present composition is
Alternatively, they can be used as a mixture of two or more.
As the poorly water-soluble solvent for the EW preparation described later, an aromatic solvent is preferred from the viewpoint of high solubility.
Aromatic solvents having a flash point of 120 ° C. or higher, more preferably 120 ° C. or higher, are preferred. As the poorly water-soluble solvent for the SE preparation described later, an aliphatic solvent is preferred from the viewpoint of low solubility, and isoparaffin, cycloparaffin, and ester solvent are particularly preferred. In addition, in the present composition, the ratio of the poorly water-soluble solvent to the poorly water-soluble active ingredient can be appropriately determined depending on the preparation form, the purpose of use, and the like.
It is 00 times by weight, preferably 1 to 100 times by weight, and more preferably 2 to 50 times by weight. The content of the poorly water-soluble solvent in the present composition is usually 0.1 to 50% by weight, preferably 1 to 30% by weight.

Specific examples of the poorly water-soluble solvent include, for example,
Hisol SAS-296 (mixture of 1-phenyl-1-xylylethane and 1-phenyl-1-ethylphenylethane, trade name of Nippon Oil Co., Ltd.), Hisol SA
S-LH (trade name of Nippon Oil Co., Ltd.), Shersol A (trade name of Shell Chemical Co., Ltd.), Shersol AB
(Shell Chemical Co., Ltd.), Shell Sol E (Shell Chemical Co., Ltd.), Shell Sol R (Shell Chemical Co., Ltd.), Shell Sol T (Shell Chemical Co., Ltd.), Shell Zol D-70 (trade name of Shell Chemical Co., Ltd.), Cactus Solvent HP-MN
(Methylnaphthalene 80%, trade name of Nikko Petrochemical Co., Ltd.), Cactus Solvent HP-DMN (dimethylnaphthalene 80%, trade name of Nikko Petrochemical Co., Ltd.), Cactus Solvent P-100 (alkylbenzene having 9 to 10 carbon atoms) Cactus Solvent P-150 (alkylbenzene, trade name of Nippon Petrochemical Co., Ltd.), Cactus Solvent P-18
0 (a mixture of methylnaphthalene and dimethylnaphthalene,
Cactus Solvent P-200 (mixture of methyl naphthalene and dimethyl naphthalene, trade name of Nikko Petrochemical Co., Ltd.), Cactus Solvent P-220 (mixture of methyl naphthalene and dimethyl naphthalene, Nippon Oil Cactus Solvent PAD-1 (dimethyl monoisopropyl naphthalene, trade name of Nippon Petrochemical Co., Ltd.), Solvesso 100 (aromatic hydrocarbon, trade name of ExxonMobil Chemical Co., Ltd.), Solvesso 150 (trade name of ExxonMobil Chemical Co., Ltd.) Aromatic hydrocarbons, ExxonMobil Chemical Co., Ltd.), Solvesso 200 (Aromatic Hydrocarbons, ExxonMobil Chemical Co., Ltd.), Swazol 100 (toluene, trade name of Maruzen Oil Co., Ltd.), Swazol 200 ( Xylene, Maruzen Petroleum Association Of trade name), VINYCIZER 20
(Diisotridecyl phthalate, trade name of Kao Corporation), Vinicizer 40 (diisobutyl adipate, trade name of Kao Corporation), Vinicizer 50 (diisodecyl adipate, trade name of Kao Corporation), Vinicizer 85 (dialkyl phthalate) , Kao Corporation product name),
Vinicizer 105 (didecyl phthalate, trade name of Kao Corporation) Vinicizer 124 (dialkyl phthalate,
Kao Corporation, Exepearl O-OL (Octyl Oleate, Kao Corporation), Exepar L-OL (Lauryl Oleate, Kao Corporation), Exeparal OD-OL (Octyl Oleate) Dodecyl, trade name of Kao Corporation), Toxanone PP-1
000 (polyoxypropylene glycol, trade name of Sanyo Chemical Industry Co., Ltd.), Nikkor IPA-A (trade name of isopropyl myristate, Nikko Chemical Co., Ltd.), Nikkor IPA-EX (isopropyl myristate, of Nikko Chemical Co., Ltd.) Product name), Teclean N
-30 (trade name of Nippon Oil Co., Ltd.), Teclean N-
32 (trade name of Nippon Oil Co., Ltd.), Teclean N-3
3 (trade name of Japan Oil Co., Ltd.), Machine Oil 46P (trade name of Japan-US Mineral Oil Co., Ltd.), Pesticide Machine Oil P (trade name of Japan-US Mineral Oil Co., Ltd.), Pesticide Oil H (Japan-U.S. Co., Ltd.), Super Oil A (Japan-US Mineral Oil Co., Ltd.), Super Oil B (Japan-US Mineral Oil Co., Ltd.), Super Oil C (Japan-US Mineral Oil Co., Ltd.) ), Super Oil D (trade name of Japan-US Mineral Oil Co., Ltd.), Super Oil E (trade name of Japan-US Mineral Oil Co., Ltd.), Super Oil F (trade name of Japan-US Mineral Oil Co., Ltd.), No. 1 spindle Oil (trade name of US-Japan Mineral Oil Co., Ltd.), No. 2 spindle oil (trade name of Japan-US Mineral Oil Co., Ltd.), B machine oil (trade name of Japan-US Mineral Oil Co., Ltd.), C machine oil (Japan-US) Minyu Oil Co., Ltd.), Naphthesol M
(Naphthene / isoparaffin / normal paraffin / aroma = 75% or more / 5 to 10% / 10% or less / 5% or less, trade name of Nippon Petrochemical Industry Co., Ltd.), naphthesol M (naphthene / isoparaffin / normal paraffin / aroma = 70% or more / 5 to 10% / 15% or less / 5%
Hereinafter, Nippon Petrochemical Co., Ltd.), Isosol 300 (Nippon Petrochemical Co., Ltd.), Isosol 400 (Nippon Petrochemical Co., Ltd.), Exol D80 (A mixture of paraffin and cycloparaffin) Solvent, ExxonMobil Chemical Co., Ltd., Exol D110 (mixed solvent of paraffin and cycloparaffin, Exxon Chemical Co., Ltd.), Exol D130 (mixed solvent of paraffin and cycloparaffin, ExxonMobil Chemical Co., Ltd.) Exol D160 (mixed solvent of paraffin and cycloparaffin, trade name of ExxonMobil Chemical Co., Ltd.), Isopar E (trade name of Kerosene, ExxonMobil Chemical Co., Ltd.), Isopar G (Kerosine, of ExxonMobil Chemical Co., Ltd.) Product ), Isopar H (kerosene,
ExxonMobil Chemical Co., Ltd., Isopar M (Kerosine, ExxonMobil Chemical Co., Ltd.), Neothiozole (Kerosine, Chuo Kasei Co., Ltd.) IP Solvent 2028 (Isoparaffin oil, Idemitsu Petrochemical Co., Ltd.) ), IP solvent 283
5 (isoparaffinic oil, Idemitsu Petrochemical Co., Ltd.), Naplex 38 (naphthenic oil, trade name of ExxonMobil Oil Co., Ltd.), White Rex 2
05 (ExxonMobil Oil Co., Ltd.), White Rex 207 (ExxonMobil Oil Co., Ltd.), White Rex 215 (ExxonMobil Oil Co., Ltd.), White Rex 247 (ExxonMobil Oil Co., Ltd.) (Trade name), White Rex 2210 (trade name of ExxonMobil Sekiyu KK), White Rex 307 (trade name of Exxon Mobil Sekiyu KK), White Rex 309 (trade name of Exxon Mobil Sekiyu KK), White Rex 326 ( ExxonMobil Oil Co., Ltd.) and White Rex 335 (ExxonMobil Oil Co., Ltd.).

The composition comprises at least one selected from the group consisting of (a) a poorly water-soluble active ingredient, (b) a water-soluble active ingredient, (c) a nonionic surfactant and an anionic surfactant, and (d) an anionic surfactant. Contains water-soluble polymer, (e) poorly water-soluble solvent and (f) water, and if necessary, viscosity modifier, defoamer, antifreeze, preservative, stabilizer, coloring agent, flavor, efficacy It may contain an enhancer, a safener and the like.

Examples of the viscosity modifier that can be used in the present composition include natural polysaccharides such as xanthan gum, ramzan gum, locust bean gum, carrageenan, and werant gum; synthetic polymers of sodium polyacrylate; and semi-synthetic polymers such as carboxymethyl cellulose. , Aluminum silicate, smectite, bentonite, hecrite,
Mineral powder such as fumed silica, alumina sol and the like can be mentioned. For example, as Xanthan gum, Kelzan S
(Manufactured by Monsanto), and as the aluminum silicate, Vegum R (manufactured by Vanderbilt) and the like can be mentioned. Further, as the dry silica, Aerosil 200 (manufactured by Degussa Huls) can be mentioned, and as a mixture of dry silica and alumina sol, Aerosil COK-84 (manufactured by Degussa Huls) can be mentioned. When a viscosity modifier is used, its amount is usually 0.01 to 10% by weight in the present composition,
Preferably it is 0.1 to 5% by weight. In addition, these viscosity modifiers need to be sufficiently dissolved and / or swollen in water so as to obtain a thickening effect with a smaller amount, and therefore it is preferable to add them before adding the water-soluble active ingredient.

Antifoaming agents which can be used in the present composition include, for example, Antifoam C (trade name of Dow Corning), Antifoam CE (trade name of Dow Corning), TSA730 (trade name of Toshiba Silicone Co., Ltd.) Name),
TSA731 (trade name of Toshiba Silicone Co., Ltd.), TSA7
32 (trade name of Toshiba Silicone Co., Ltd.), YMA6509
(Trade name of Toshiba Silicone Co., Ltd.) and fluorine-based defoamers such as Fluo-Wet PL80 (trade name of Clariant). When an antifoam is used, its amount is usually about 0.001 to 3% by weight in the preparation.

The antifreezing agent that can be used in the present composition includes, for example, water-soluble glycols such as propylene glycol. When the antifreezing agent is used, its amount is usually 0.5 to 30% by weight in the preparation. %, Preferably 1-2
0% by weight, more preferably about 5 to 10% by weight.

The preservatives that can be used in the present composition include, for example, p-hydroxybenzoic acid esters, salicylic acid derivatives, isothiazolin-3-one derivatives, and the like. Usually 0.
It is about 0.01 to 5% by weight, preferably about 0.05 to 3% by weight, and more preferably about 0.1 to 1% by weight.

The composition comprises at least one (a) a poorly water-soluble active ingredient, (b) a water-soluble active ingredient, (c) a nonionic surfactant and an anionic surfactant. Described)), (d) anionic water-soluble polymer and
(e) an aqueous herbicide composition containing a poorly water-soluble solvent,
(A) in a solvent mainly containing water (hereinafter referred to as an aqueous solvent)
There are a poorly water-soluble active ingredient, (b) a water-soluble active ingredient, (c) a surfactant, (d) an anionic water-soluble polymer, and (e) a poorly water-soluble solvent.

In the present composition, the aqueous solvent forms a continuous phase (aqueous phase), and the water-soluble active ingredient is usually dissolved in the aqueous phase. The poorly water-soluble active ingredient does not substantially dissolve in the aqueous phase but exists in a dispersed state in the aqueous phase. The composition may take various pharmaceutical forms depending on the dispersion form of the poorly water-soluble active ingredient.

As the pharmaceutical form of the composition, there are a case where the poorly water-soluble active ingredient is suspended as solid fine particles in the aqueous phase and a case where the poorly water-soluble active ingredient is emulsified as liquid fine particles in the aqueous phase. . When the poorly water-soluble active ingredient is suspended as solid fine particles in the aqueous phase, the pharmaceutical form is a capsule in which oil droplets obtained by dissolving the poorly water-soluble active ingredient in a solvent are encapsulated and suspended in the aqueous phase. Suspension preparations, suspoemulsion preparations in which a solid poorly water-soluble active ingredient is suspended in an aqueous phase and a solvent is emulsified in the aqueous phase, encapsulated solid or liquid poorly water-soluble active ingredients are suspended in an aqueous phase, and Capsule suspoemulsion preparations in which the solvent is emulsified in the phase are exemplified.

On the other hand, when the poorly water-soluble active ingredient is emulsified in the aqueous phase as liquid fine particles, the pharmaceutical form is as follows:
For example, an emulsion formulation in which a liquid poorly water-soluble active ingredient is emulsified in an aqueous phase, an emulsion formulation in which oil droplets obtained by dissolving a solid poorly water-soluble active ingredient in a solvent, and a solid poorly water-soluble active ingredient are used. An example is a suspoemulsion in which oil droplets suspended in a solvent are emulsified in an aqueous phase.

A capsule suspension formulation (hereinafter, CS)
Is sometimes referred to as a preparation) is a preparation in which microparticles (microcapsules) having a volume median diameter of several μm to several tens μm in which an active ingredient is encapsulated in a membrane substance are suspended in water. Examples of the membrane substance forming the microcapsules include polyurea, polyurethane, polyamide, urea formalin resin, melamine formalin resin, gelatin, albumin, and chitosan. When the present composition is a CS preparation, microcapsules containing a poorly water-soluble active ingredient adjusted to a volume median diameter of usually 0.1 to 50 μm, preferably 0.5 to 40 μm, more preferably about 1 to 30 μm are prepared. , A water-soluble active ingredient, a surfactant, and an anionic water-soluble polymer.

Examples of the microencapsulation method include known methods such as an interfacial polymerization method, an in-situ method, a phase separation (coacervation) method, and a submerged drying method. The interfacial polymerization method is a method of preparing a microcapsule by dissolving a monomer in two solvents that are not mixed with each other, and using an interfacial polymerization reaction for synthesizing a polymer at an interface between the two liquids. In the in-situ method, a monomer and a catalyst are optionally dissolved in one of two phases that are not mixed with each other, and the monomer is polymerized at an interface to form a uniform film on the surface of the core material. This is a method for preparing microcapsules.

The phase separation (coacervation) method is usually
Utilizing the phenomenon (coacervation) that separates into a concentrated phase and a dilute continuous phase when the composition of the solvent in the polymer solution changes slightly, the addition of a phase separation inducer with high affinity for the solvent, This is a method for preparing microcapsules by precipitating one or more kinds of polymer colloids at the interface by interaction or hydrogen bonding to form a film.

In the in-liquid drying method, usually, a solution or solid serving as a core is dispersed in a solvent in which a polymer serving as a wall material is dissolved, and this is further dispersed in a solvent which is not mixed with the solvent. This is a method of preparing microcapsules by gradually removing the solvent and precipitating the polymer at the interface of the core substance.

The microencapsulation method and the type of the membrane substance can be appropriately selected depending on the purpose. When the hardly water-soluble active ingredient is converted into micropsels, the hardly water-soluble active ingredient can be dissolved or suspended in a hardly water-soluble solvent in advance, if necessary. When the present composition is a CS preparation, for example, a surfactant, an anionic water-soluble polymer, a water-soluble active ingredient and water, and if necessary, a viscosity modifier, an antifoaming agent, an antifreezing agent, a preservative, and the like. After mixing, it can be obtained by adding a previously prepared aqueous dispersion of microcapsules to the mixture using a stirrer such as a chemical mixer and dispersing the microcapsules.

In the present composition, when the poorly water-soluble solvent phase is emulsified in the present composition and the poorly water-soluble active ingredient is dispersed inside or outside the poorly water-soluble solvent phase, fine droplets of the poorly water-soluble solvent phase are used. (Hereinafter, referred to as suspoemulsion particles) is a composition comprising an aqueous phase and an emulsion formed, and a poorly water-soluble active ingredient dispersed in the suspoemulsion particles or the aqueous phase. Examples thereof include a suspoemulsion formulation (hereinafter, sometimes referred to as an SE formulation), and the suspoemulsion particles are present in the composition in an emulsified state, and include a water-soluble active ingredient, a surfactant, It forms an emulsion with an aqueous phase containing an anionic water-soluble polymer. The volume average particle diameter of the poorly water-soluble active ingredient in the SE preparation is usually about 0.1 to 50 μm, preferably about 0.3 to 30 μm, and more preferably about 0.5 to 20 μm.

When the composition is an SE preparation, for example, an anionic water-soluble polymer is dissolved in water, and then a surfactant, a sparingly water-soluble active ingredient, a sparingly water-soluble active ingredient and a sparingly water-soluble active ingredient are added thereto. A water-insoluble solvent that does not dissolve in water and, if necessary, an auxiliary agent such as a viscosity modifier, an antifoaming agent, an antifreezing agent, and a preservative, are added. After mixing, a wet grinding method using a medium such as glass beads or zirconia is performed. When used, pulverization, dispersion and emulsification can be carried out simultaneously. Alternatively, an emulsion and a suspension can be separately prepared and then mixed. In addition, a method in which an emulsion is prepared in advance and the poorly water-soluble active ingredient is pulverized and dispersed therein, or a method in which a suspension in which the poorly water-soluble active ingredient is pulverized and dispersed therein is prepared in advance, and the poorly water-soluble solvent is emulsified therein. And the like.

In the present composition, when the hardly water-soluble active ingredient is dissolved in the hardly water-soluble solvent and the solvent phase is dispersed in the water phase, that is, the hardly water-soluble active ingredient is dissolved in fine droplets of the hardly water-soluble solvent. And a composition in which small droplets in which the poorly water-soluble active ingredient is dissolved are emulsified in the aqueous phase, and when the poorly water-soluble active ingredient is dispersed in the aqueous phase in a liquid state,
That is, small droplets of the poorly water-soluble active ingredient (hereinafter, the small droplets of the poorly water-soluble active ingredient and the small droplets in which the poorly water-soluble active ingredient is dissolved may be collectively referred to as emulsion particles) are contained in the aqueous phase. It is a composition which is emulsified. As specific preparations of these compositions, emulsion preparations (hereinafter, referred to as emulsion preparations)
EW formulation).

When the poorly water-soluble active ingredient is solid or semi-solid at room temperature, it is dissolved in a poorly water-soluble solvent in advance, and the solution is emulsified and dispersed in water to prepare an EW preparation. When the poorly water-soluble active ingredient is a liquid at room temperature, the poorly water-soluble active ingredient can be used as it is, or can be dissolved in a poorly water-soluble solvent in advance and the solution can be emulsified and dispersed in water to prepare an EW preparation. Usually 0.1 to 50 μm, preferably 0.3 to 4
The emulsion particles adjusted to 0 μm, more preferably about 0.5 to 30 μm are dispersed in an aqueous phase containing a water-soluble active ingredient, a surfactant and an anionic water-soluble polymer.

When the present composition is an emulsion preparation, for example, when a poorly water-soluble active ingredient is dissolved in a poorly water-soluble solvent, a surfactant, an anionic water-soluble polymer, a water-soluble active ingredient, and water, if necessary, It is obtained by dispersing a solution in which a poorly water-soluble active ingredient is dissolved in a poorly water-soluble solvent in a mixture comprising a regulator, an antifoaming agent, an antifreezing agent, a preservative, and the like, using a stirrer such as a homogenizer. On the other hand, when the poorly water-soluble active ingredient is liquid at room temperature and does not use a poorly water-soluble solvent, a surfactant, an ionic water-soluble polymer, a water-soluble active ingredient, and water, and if necessary, a viscosity modifier and a defoaming agent are used. It can be obtained by directly dispersing a poorly water-soluble active ingredient in a mixture comprising an antifreezing agent, a preservative and the like using a stirrer such as a homogenizer.

In the present composition using a poorly water-soluble solvent,
By appropriately selecting the type and amount of the poorly water-soluble solvent,
It can be in a desired formulation form (SE formulation, EW formulation). For example, when a poorly water-soluble solvent of the kind and amount that dissolves the poorly water-soluble active ingredient to be used is used, the present composition is EW.
When using a poorly water-soluble solvent that does not substantially dissolve a solid or semi-solid poorly water-soluble active ingredient, or using a poorly water-soluble solvent in a ratio smaller than the solubility of the solid or semi-solid poorly water-soluble active ingredient. Is an SE formulation.

The composition may further contain other herbicides, and may further contain an insecticide, an acaricide, a nematocide, a fungicide, a plant growth regulator, a fertilizer, and the like. it can.

The weeds which can be controlled by the composition of the present invention include buckwheat, Sanae-dade, Rumex japonicus, Purslane,
Hawk-weed, Ushiha-kuboko, Shiroza, Ao-getoto, Noharagura-shi, Nazuna, Utsunoxanem, Ebisugusa, Jabujirami, Ichibi, Aki-shikojika, Field pansy, Yaegura, U.S.A. Ooinoufuguri, Onamimomi, Sunflower, Dog chamomile, Corn marigold, Artemisia, Smeltflower,
For example, broadleaf weeds, such as broadleaf weeds, camphoraceae, barnyardgrass, enokorogosa, achinoekorogosa, mehisiba, sparrow caterpillar, nosumetepo, oak, oak grasshopper, and cynomorphidae, such as cypress weeds, etc. Of the Cyperaceae family.

The composition of the present invention can be used in fields, fallow lands, paddy levees,
It can be used as a herbicide in orchards, pastures, lawns, forests or non-agricultural lands. For example, before or after emergence of the weeds, the composition can be subjected to soil treatment, foliage treatment or flooding treatment. Soil treatment includes soil surface treatment and soil admixture treatment.Stalk and foliage treatment includes treatment from above the plants and local treatment that treats only weeds so that they do not adhere to crops. The composition can be applied in any of the processes. In the case of a paddy field or the like, in some cases, such treatment as water mouth treatment, water surface treatment, and the like can be performed without dilution. The composition diluted for the spraying process can be sprayed in the air by helicopter, airplane, or radio-controlled helicopter.

The application rate of the present composition depends on the mixing ratio of the active ingredients,
Although it varies depending on the form of preparation, the type of target weed, weather conditions, etc., the total amount of active ingredient per hectare is usually 10
It is 0 to 20,000 g, preferably 500 to 8000 g. If necessary, an auxiliary agent such as a spreading agent may be added. As a spreading agent, liquid nitrogen, agridex (trade name of Helena Chemical Co., Ltd.), dynamic (trade name of Helena Chemical Co., Ltd.), Induce (trade name of Helena Chemical Co., Ltd.), and Silwet L-77 (produced by Nippon Unicar) ) And the like.

[0044]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples. Example 1 Aromatic high-boiling organic solvent (manufactured by ExxonMobil Chemical Co., Ltd.)
6.8 g of full microlac pentyl was dissolved in 30 g of trade name: Solvesso 200) to obtain a uniform solution. To the resulting solution was added 100 g of sodium alkyl sulfate / 2 mol of EO (trade name: Rhodapex N70K, manufactured by Rhodia). K. 5000 minutes at room temperature using an auto homomixer (trade name, Disper manufactured by Tokushu Kika Kogyo Co., Ltd.)
Stir at rpm. T. K. While stirring with an auto homomixer (normal temperature, 5,000 rpm), 249 g of an 8% by weight aqueous solution of gum arabic was gradually added to the dispersion, and stirring (5,000 rpm) was further continued at normal temperature for 10 minutes to obtain a uniform mixture. An emulsion slurry was obtained. Then, T. K. Under stirring with an auto-homomixer (normal temperature, 5000 rpm), 774.2 g of an aqueous solution of glyphosate isopropylamine salt (purity: 62%) and a silica / aluminum oxide mixture (trade name: Aerosil COK-84) were added to the slurry. 20 g was added, and stirring (5,000 revolutions / minute) was further continued at room temperature for 10 minutes to obtain a composition of the present invention.

Example 2 Example 1 was repeated except that sodium alkyl sulfate / 3 mol of EO (trade name: Rhodapex 3N70) was used instead of sodium alkyl sulfate / 2 mol of EO.
The same operation as described above was performed to obtain the composition of the present invention.

Example 3 An aliphatic alcohol polyglycol ether (manufactured by Clariant Co., Ltd.) was used instead of sodium alkyl sulfate / 2 mol of EO.
Using the product name: Emulsogen M), the same operation as in Example 1 was carried out except that 179 g of an 11.2% by weight aqueous solution of gum arabic was used instead of 249 g of an aqueous solution of 8% by weight gum arabic to obtain a composition of the present invention. .

Example 4 Polyoxyethylene tristyryl ether phosphate (trade name: Soprofol FLK, manufactured by Rhodia) in place of 100 g of sodium alkyl sulfate / 2 mol of EO
The composition of the present invention was obtained in the same manner as in Example 1 except that 10 g was used, and 159 g of a 12.6% by weight aqueous gum arabic solution was used instead of 249 g of an 8% by weight aqueous gum arabic solution.

Example 5 The same operation as in Example 4 was carried out except that polyoxyethylene aliphatic alcohol (manufactured by Clariant, trade name: Genapol C100) was used instead of polyoxyethylene tristyryl ether phosphate. A composition was obtained.

Example 6 In place of polyoxyethylene tristyryl ether phosphate, sodium salt of an aliphatic alcohol ether sulfate (trade name: Genapol L, manufactured by Clariant)
The same operation as in Example 4 was performed except that RO paste was used to obtain a composition of the present invention.

Example 7 The same operation as in Example 4 was carried out, except that a silicone-based surfactant (trade name: Silwet 560, manufactured by Nippon Unicar Co., Ltd.) was used instead of polyoxyethylene tristyryl ether phosphate. An inventive composition was obtained.

Example 8 Tristyryl phenyl sulfate (trade name: Soprofol TSS-1 manufactured by Rhodia Co., Ltd.) was used in place of 10 g of polyoxyethylene tristyryl ether phosphate.
0) 12.6% by weight of gum arabic aqueous solution 1 using 6 g
Instead of 59 g, an aqueous solution of 12.3% by weight gum arabic 16
The same operation as in Example 4 was performed except that 3 g was used, to obtain a composition of the present invention.

Example 9 Instead of polyoxyethylene tristyryl ether phosphate, tristyrylphenyl type surfactant / EO2
0 mol (Clariant, product name: Emulsogen 3)
474), except for using 474).
An inventive composition was obtained.

Example 10 Phosphate ester type surfactant / EO.PO.EO block polymer (manufactured by Clariant, trade name: Disperger Mittel 3618) instead of 10 g of polyoxyethylene tristyryl ether phosphate, 3 g
And using the same procedure as in Example 4 except that 166 g of a 12% by weight aqueous solution of gum arabic was used instead of 159 g of an aqueous solution of 12.6% by weight gum arabic to obtain the composition of the present invention.

Example 11 Phosphate Ester Surfactant / EO.PO.E
A composition of the present invention was obtained by performing the same operation as in Example 10 except that an alcohol PO / EO block polymer (manufactured by Clariant, trade name: Emulsogen 3510) was used instead of the O block polymer.

Example 12 An aromatic high-boiling organic solvent (manufactured by ExxonMobil Chemical Co., Ltd.)
34.2 g of full microrack pentyl and isocyanate (manufactured by Sumitomo Bayer Urethane Co., Ltd., trade name: Sumidur N-320) in 150 g of trade name: Solvesso 200
0) 1.2 g was dissolved to obtain a uniform solution. This was added to 189.6 g of a 6% by weight aqueous solution of gum arabic containing 3.2 g of ethylene glycol. K. The mixture was stirred at room temperature at 6000 rpm using an auto homomixer to obtain microdroplets. Subsequently, the mixture was gently stirred at 60 ° C. for 20 hours, and then 125 g of water was added to obtain microcapsules containing 6.8% by weight of full microlac pentyl. 100 g of the microcapsules were 32 g of a sodium salt of an aliphatic alcohol ether sulfate (trade name: Genapol LRO paste, manufactured by Clariant), 32 g of polyoxyethylene aliphatic alcohol (trade name: Genapol C100, manufactured by Clariant), 16 g of methoxypropanol,
20 g of Aerosil COK-84 (mixture of fumed silica and alumina sol), 774.2 g of an aqueous solution of glyphosate isopropylamine salt (62% purity) and 25.25 g of water.
8 g of T.I. K. Under stirring with an auto homomixer (room temperature,
5000 rpm) and 900 g of the Aerosil dispersion, and stirring (5000 rpm) was further continued at room temperature for 10 minutes to obtain the composition of the present invention.

Example 13 In place of 32 g of sodium salt of aliphatic alcohol ether sulfate, 32 g of polyoxyethylene aliphatic alcohol and 16 g of methoxypropanol, 72 g of a silicone surfactant (trade name: Silwet 806, manufactured by Nippon Unicar Co., Ltd.) And the amount of water in the preparation of the dispersion 2
The same operation as in Example 12 was performed, except that 5.8 g was changed to 33.8 g, to obtain a composition of the present invention.

Example 14 20 g of gum arabic (manufactured by Sanei Chemical Co., trade name: Arabic Cole SS) was dissolved in 237.9 g of water to obtain gum arabic water. 5 g of sodium alkylsulfate / EO2 mol (manufactured by Rhodia, trade name: Rhodapex N70K), 30 g of aliphatic alcohol polyglycol ether (manufactured by Clariant, trade name: Emulsogen M) in this gum arabic water, aromatic solvent-based high boiling point 30 g of a solvent (manufactured by ExxonMobil Chemical Co., trade name: Solvesso 200), 0.5 g of Antifoam CE (manufactured by Dow Corning), 50 g of polyethylene glycol, 774.2 g of an aqueous solution of glyphosate isopropylamine salt (purity 62%), silica 20 g of an aluminum oxide mixture (trade name: Aerosil COK-84, manufactured by Degussa Huls) and 2.4 g of flumioxazine are added, and the whole amount is pulverized with a dyno mill to obtain the composition of the present invention.

Example 15 Aromatic solvent-based high-boiling solvents (manufactured by ExxonMobil Chemical Co., Ltd.)
The same operation as in Example 14 is performed except that methyl oleate is used instead of (trade name: Solvesso 200) to obtain the composition of the present invention.

Example 16 2.4 g of flumioxazine is dissolved in 80 g of benzyl acetate to obtain a uniform solution. The solution was combined with 207.9 g of a 9.6% by weight aqueous solution of gum arabic, sodium alkyl sulfate / EO
2 mol (trade name: Rhodapex N7, manufactured by Rhodia)
0K) 5 g, aliphatic alcohol polyglycol ether (manufactured by Clariant, trade name: Emarsogen M) 30
g, polyethylene glycol 50 g, antifoam C
E (manufactured by Dow Corning) 0.5 g and an aqueous solution of glyphosate isopropylamine salt (purity 62%) 7
In 74.2 g of the mixture, T.P. K. The mixture is emulsified and dispersed at 5,000 rpm for 10 minutes at room temperature using an auto homomixer (trade name, Disper manufactured by Tokushu Kika Kogyo Co., Ltd.). T. K.
Under stirring with an auto homomixer (normal temperature, 5000 rpm /
), A silica / aluminum oxide mixture (trade name: Aerosil COK-8, manufactured by Degussa Huls) in the emulsion.
4) Add 20 g, and continue stirring (5,000 revolutions / minute) at room temperature for 10 minutes to obtain the composition of the present invention.

Example 17 The same procedure as in Example 14 was carried out except that flumioxazine was replaced with full microlacpentyl, to obtain a composition of the present invention.

Example 18 The same operation as in Example 14 was carried out except that carfentrazone-ethyl was used instead of flumioxazine, to obtain a composition of the present invention.

Example 19 The same operation as in Example 14 was carried out except that sulfentrazone was used instead of flumioxazine, to obtain a composition of the present invention.

Example 20 The same procedure as in Example 14 was carried out, except that fluthiacetmethyl was used instead of flumioxazine, to obtain a composition of the present invention.

Example 21 The same operation as in Example 14 was carried out except that pyraflufenethyl was used instead of flumioxazin, to obtain a composition of the present invention.

Example 22 The same operation as in Example 14 was carried out except that sinidoneethyl was used instead of flumioxazin, to obtain a composition of the present invention.

Example 23 The same procedure as in Example 14 was carried out except that azaphenidine was used instead of flumioxazine, to obtain a composition of the present invention.

Example 24 The same procedure as in Example 14 was carried out except that lactofen was used instead of flumioxazine, to obtain a composition of the present invention.

Example 25 The same procedure as in Example 14 was carried out except that bifenox was used instead of flumioxazine, to obtain a composition of the present invention.

Example 26 The same procedure as in Example 14 was carried out except that butaphenacyl was used instead of flumioxazine, to obtain a composition of the present invention.

Example 27 In a 3 liter stainless beaker, 4 g of flumioxazin, 16 g of glyphosate, polyoxyethylene sorbitan monooleate (trade name: Sorbon T, manufactured by Toho Chemical Co., Ltd.)
-20) 10 g, 10 g of carboxymethylcellulose and 660 g of water were mixed, and 1050 g of glass beads having a diameter of 1.0 to 1.5 mm were added. K. Using an auto homomixer (trade name, Disper manufactured by Tokushu Kika Kogyo Co., Ltd.), the mixture was stirred at room temperature for 30 minutes at 5000 rpm, and then the glass beads were removed to obtain a ground slurry. To 70 g of the obtained ground slurry, 30 g of an aromatic high-boiling organic solvent (trade name: Solvesso 200, manufactured by ExxonMobil Chemical Co., Ltd.) was added,
T. K. The composition of the present invention was obtained by stirring (normal temperature, 5000 revolutions / minute) for 10 minutes with an auto homomixer. Example 28 In a 3 liter stainless beaker, 4 g of flumioxazin, 16 g of glyphosate, polyoxyethylene sorbitan monooleate (trade name: Sorbon T, manufactured by Toho Chemical Co., Ltd.)
-20) 10 g, 10 g of carboxymethylcellulose and 660 g of water were mixed, and 1050 g of glass beads having a diameter of 1.0 to 1.5 mm were added. K. Using an auto homomixer (trade name, Disper manufactured by Tokushu Kika Kogyo Co., Ltd.), the mixture was stirred at room temperature for 30 minutes at 5000 rpm, and then the glass beads were removed to obtain a ground slurry. 3 g of an aromatic high-boiling organic solvent (manufactured by ExxonMobil Chemical Co., Ltd., trade name: Solvesso 200) and water 27 were added to 70 g of the obtained ground slurry.
g. K. Stir with auto homomixer (room temperature,
(5,000 rpm) for 10 minutes to obtain the composition of the present invention.

Comparative Example 1 Polyoxyethylene tallow alkylamine (manufactured by Witco, trade name: 32 g) was used in place of 32 g of the sodium salt of aliphatic alcohol ether sulfate, 32 g of polyoxyethylene aliphatic alcohol and 16 g of methoxypropanol.
A comparative preparation was obtained in the same manner as in Example 12, except that 60 g of witcoamine (TAM-45) was used, and the amount of water in the preparation of the dispersion was changed to 45.8 g.

Test Example 1 Each preparation obtained in Examples 1 to 13 and Comparative Example 1 was put in a glass bottle and stored at 60 ° C. for 5 days. The content of full microlac pentyl was compared with that immediately after preparation of the preparation, and the decomposition rate was calculated. Table 1 shows the results.

[0073]

[Table 1]

Comparative Example 2 An emulsion preparation was obtained in the same manner as in Example 1 except that water was used instead of the 8% by weight aqueous solution of gum arabic.

Comparative Example 3 An emulsion preparation was obtained in the same manner as in Example 2, except that water was used instead of the 8% by weight aqueous solution of gum arabic.

Test Example 2 Each preparation obtained in Examples 1 to 13 and Comparative Examples 2 to 3 was transferred to a plastic container, and after 10 minutes, the uniformity of the preparation was visually confirmed. Table 3 shows the results.

[0077]

[Table 2]

Comparative Example 4 Aromatic high boiling organic solvent (manufactured by ExxonMobil Chemical Co., Ltd.)
Trade name: Solvesso 200) The same operation as in Example 27 was carried out except that 30 g of water was used instead of 30 g, to obtain a flowable preparation.

Test Example 3 Field soil was filled in a plastic pot of 17 cm × 12 cm × 7 cm, and ragweed seeds were sown and grown in a greenhouse for 28 days. Each preparation of Example 28 and Comparative Example 4 was diluted with a predetermined amount of water, and was uniformly sprayed from above the plant with a small sprayer. The plants were grown in a greenhouse for 7 days after the treatment, and the herbicidal efficacy was evaluated. The results are shown in the table.

Evaluation Criteria The evaluation of the herbicidal efficacy was made as "0" when the growth state of the test weed at the time of the survey showed no or little difference from that of the untreated one, and the test plant completely died or did not grow. What is completely suppressed is “10”, and 11 of 0 to 10
Divided into stages, 0, 1, 2, 3, 4, 5, 6, 7, 8,
Shown at 9 and 10. Evaluation values of herbicidal efficacy "7", "8",
"9" and "10" mean that the herbicidal effect is excellent, and an evaluation value "5" or less means that the herbicidal effect is insufficient for practical use.

[0081]

[Table 3]

Test Example 4 Field soil was filled in a plastic pot of 17 cm × 12 cm × 7 cm, and a fir seed was sown and grown in a greenhouse for 28 days. Each preparation of Example 28 and Comparative Example 4 was diluted with a predetermined amount of water, and was uniformly sprayed from above the plant with a small sprayer. The plants were grown in a greenhouse for 7 days after the treatment, and the herbicidal efficacy was evaluated. The results are shown in the table. The evaluation criteria are the same as in Test Example 3.

[0083]

[Table 4]

[0084]

According to the present invention, it is possible to provide an aqueous herbicide composition in which the decomposition of the active ingredient is suppressed for a long period of time and the preparation is highly stable.

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Claims (8)

[Claims] (1) at least one selected from (a) a poorly water-soluble herbicidal active ingredient, (b) a water-soluble herbicidal active ingredient, (c) a nonionic surfactant and an anionic surfactant, and (d) an anionic surfactant. An aqueous herbicide composition comprising a water-soluble polymer, (e) a poorly water-soluble organic solvent, and (f) water. (2) 0.1 to 30% by weight of (a) a poorly water-soluble herbicidal active ingredient, (b) 15 to 80% by weight of a water-soluble herbicidal active ingredient, (c) a nonionic surfactant and an anionic surfactant. 0.1 to 30% by weight of at least one selected from the group consisting of (d) 0.1 to 20% by weight of an anionic water-soluble polymer and (e) a poorly water-soluble organic solvent.
The aqueous herbicidal composition according to claim 1, which contains 0.1 to 50% by weight. 3. The aqueous herbicidal composition according to claim 1, wherein the poorly water-soluble herbicidal active ingredient is a protoporphyrinogen oxidase-inhibiting herbicidal active ingredient. 4. The herbicidally active herbicidally water-soluble ingredient is glyphosate,
The aqueous herbicide composition according to any one of claims 1 to 3, which is at least one agriculturally acceptable salt selected from glufosinate and bialafos. 5. The poorly water-soluble herbicidal active ingredient is flumicrolacpentyl, flumioxazin, carfentrazone-ethyl, sulfentrazone, fluthiacet-methyl, pyraflufen-ethyl, sinidone-ethyl, azafenidine, lactofen, bifenox or butafenacyl. The aqueous herbicidal composition according to any one of claims 1 to 4. 6. The aquatic herbicide composition according to claim 1, wherein the anionic water-soluble polymer is a polysaccharide. 7. The gum arabic as the anionic water-soluble polymer,
The aqueous herbicidal composition according to any one of claims 1 to 6, which is xanthan gum, locust gum, alginic acid, a salt of alginic acid, carboxymethyl cellulose, a salt of carboxymethyl cellulose, or a lignin sulfonate. 8. A method for controlling weeds, comprising applying the aqueous herbicide composition according to any one of claims 1 to 7 to a weed or a region where weeds are generated.