Aqueous herbicidal composition

Abstract

To provide an aqueous herbicidal composition that is clear and has excellent storage stability, comprising an amino acid-based herbicidal active ingredient and triaziflam.SOLUTION: An aqueous herbicidal composition comprises (a) an amino acid-based herbicidal active ingredient, (b) triaziflam, (c) one or more polar solvents selected from dialkyl sulfoxide, monovalent alcohol, carboxylic acid amides, carbonic acid ester, and cyclic amine, (d) a surfactant, and (e) water.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an aqueous herbicidal composition. [Background technology]

[0002] N-(phosphonomethyl)glycine and triaziflam are widely known as agents having excellent herbicidal effects (see, for example, Patent Document 1). It is known that when a hydrophilic amino acid-based herbicidal compound such as N-(phosphonomethyl)glycine or glufosinate is used in combination with a hydrophobic herbicidal compound such as triaziflam and a glycol-based solvent, it exhibits excellent foliage soil treatment effects (see, for example, Patent Document 2). In addition, a composition is known that contains a water-soluble herbicidal active ingredient such as N-(phosphonomethyl)glycine or glufosinate, a polyoxyethylene alkyl ether sulfate, an organic solvent, and a polyoxyethylene alkyl ether, and that can maintain a single phase when stored at low temperature (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2008 / 018501 [Patent Document 2] JP 2020-050647 A [Patent Document 3] International Publication No. 2012 / 086617 Summary of the Invention [Problem to be solved by the invention]

[0004] Amino acid-based herbicidal active ingredients such as salts of N-(phosphonomethyl)glycine, salts of glufosinate, and salts of bialaphos are generally known as agricultural chemical active ingredients with high water solubility, whereas triaziflam, as described in Patent Document 1 for example, is known as an agricultural chemical active ingredient with poor wettability due to its water- and oil-repellency.

[0005] Therefore, there are no concrete aqueous herbicide formulations that contain two pesticide active ingredients with significantly different physical properties, such as an amino acid-based herbicidal active ingredient with high water solubility and triaziflam with poor wettability, as active ingredients, and in particular, aqueous herbicide formulations that can be sprayed directly on weeds without diluting with water. Furthermore, when developing an aqueous herbicide formulation that contains many components such as surfactants and solvents in addition to the pesticide active ingredient, it is necessary to consider a great deal of adjustments, such as the types of components and their amounts to be used, to determine whether a clear aqueous formulation can be made, whether an aqueous formulation with physical properties that allow it to be sprayed directly on weeds can be made, and whether an aqueous formulation with excellent storage stability can be made.

[0006] The present invention has been made in consideration of the above problems, and an object of the present invention is to provide an aqueous herbicidal composition which contains an amino acid-based herbicidal active ingredient and triaziflam, is clear, and has excellent storage stability. [Means for solving the problem]

[0007] As a result of intensive research aimed at solving the above-mentioned problems, the inventors have found that the above-mentioned various problems can be solved by combining an amino acid-based herbicidal active ingredient, triaziflam, a specific polar solvent and a surfactant, and have thus completed the present invention.

[0008] That is, the present invention provides the following aqueous herbicide composition. 1. An aqueous herbicide composition comprising: (a) an amino acid-based herbicidal active ingredient; (b) triaziflam; (c) one or more polar solvents selected from dialkyl sulfoxides, monohydric alcohols, carboxylic acid amides, carbonate esters, and cyclic amines; (d) a surfactant; and (e) water. 2. (a) An aqueous herbicide composition according to claim 1, wherein the amino acid-based herbicidal active ingredient is one or more selected from the group consisting of salts of N-(phosphonomethyl)glycine, salts of glufosinate and salts of bialaphos. 3. (a) The aqueous herbicide composition of 2, wherein the amino acid-based herbicidal active ingredient is a salt of N-(phosphonomethyl)glycine. 4. (c) The aqueous herbicide composition according to any one of 1 to 3, wherein the polar solvent is one or more selected from the group consisting of dimethyl sulfoxide, methanol, 3-methoxy-N,N-dimethylpropanamide, propylene carbonate and 4-formylmorpholine. 5.(c) The aqueous herbicide composition of 4, wherein the polar solvent is dimethyl sulfoxide or methanol. 6. (d) The aqueous herbicide composition according to any one of 1 to 5, wherein the surfactant is one or more selected from the group consisting of polyoxyethylene castor oil, alkyl sulfates and their salts, polyoxyalkylene alkyl ethers, alkylbenzenesulfonic acids and their salts, polyoxyethylene alkyl ether phosphates and their salts, and polyoxyethylene alkyl ether sulfates and their salts. Effect of the Invention

[0009] The aqueous herbicidal composition of the present invention is clear and has excellent storage stability, particularly at low temperatures, and can be directly sprayed on weeds without diluting with water. In addition, the aqueous herbicidal composition of the present invention has a fast-acting herbicidal activity. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The aqueous herbicidal composition of the present invention contains (a) an amino acid-based herbicidal active ingredient, (b) triaziflam, (c) one or more polar solvents selected from dialkyl sulfoxides, monohydric alcohols, carboxylic acid amides, carbonate esters, and cyclic amines, (d) a surfactant, and (e) water.

[0011] [(a) Amino acid-based herbicidal active ingredient] Examples of amino acid-based herbicidal active ingredients include salts of N-(phosphonomethyl)glycine (common name: glyphosate), salts of glufosinate, and salts of bialaphos. Among these, salts of N-(phosphonomethyl)glycine are preferred. There are two types of glufosinate, racemic and L-isomers, and either can be used. N-(phosphonomethyl)glycine, glufosinate, and bialaphos are generally used as their salts. The salts are not particularly limited as long as they can be used as pesticides, and examples thereof include alkali metal salts such as sodium salts, potassium salts, and lithium salts; alkaline earth metal salts such as calcium salts; and amine salts such as ammonium salts and isopropylamine salts. Among these, preferred salts include alkali metal salts, and more preferred salts include potassium salts.

[0012] In the aqueous herbicidal composition of the present invention, the content of the amino acid herbicidal active ingredient is usually 0.5 to 5 mass %, preferably 0.5 to 2 mass %.

[0013] [(b) Triaziflam] The component (b), triaziflam (generic name), is described, for example, in JP-A-2001-172267 as a compound having herbicidal effects against grass weeds and broad-leaf plants.

[0014] The content of triaziflam in the aqueous herbicidal composition of the present invention is usually 0.05 to 20 mass %, preferably 0.1 to 5 mass %.

[0015] [(c) Polar solvent] The polar solvent of component (c) is one or more selected from dialkyl sulfoxides, monohydric alcohols, carboxylic acid amides, carbonate esters, and cyclic amines.

[0016] The dialkyl sulfoxide includes dimethyl sulfoxide.

[0017] The monohydric alcohol may have 1 to 8 carbon atoms, and specific examples thereof include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-1-propanol, 2-methyl-2-propanol, 2-phenoxyethanol, cyclohexanol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, etc. The monohydric alcohol preferably has 1 to 5 carbon atoms, more preferably has 1 to 3 carbon atoms, further preferably methanol, ethanol, 1-propanol, and most preferably methanol.

[0018] Examples of the carboxylic acid amide include 3-methoxy-N,N-dimethylpropanamide, 3-butoxy-N,N-dimethylpropanamide, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethyllactic acid amide, N,N-dimethyloctane amide, N,N-dimethyl-9-decene amide, N,N-dimethyl decanamide, N,N-dimethyl dodecane amide, and N,N-dimethyl tetradecane amide. 1~14 Carboxylic acid amides and the like are included. The number of carbon atoms in the carboxylic acid is preferably 1 to 14, and the carboxylic acid is preferably an aliphatic carboxylic acid. Among these, 3-methoxy-N,N-dimethylpropanamide, 3-butoxy-N,N-dimethylpropanamide, N,N-dimethylformamide, N,N-dimethylacetamide, and N,N-dimethyllactic acid amide are preferred, and 3-methoxy-N,N-dimethylpropanamide is more preferred. m~n " means that the number of carbon atoms is m to n (the same applies below).

[0019] The carbonate ester may be selected from the group consisting of propylene carbonate, ethylene carbonate, 1,2-butylene carbonate, and trimethylene carbonate. 2~4 Among these, propylene carbonate is preferred.

[0020] Examples of the cyclic amine include pyrrolidine, 1-methylpyrrolidine, 1-ethylpyrrolidine, 1-acetylpyrrolidine, piperidine, 1-methylpiperidine, 2,6-dimethylpiperidine, 3,5-dimethylpiperidine, 1-ethylpiperidine, 1-formylpiperidine, 1-acetylpiperidine, morpholine, 4-methylmorpholine, 2,6-dimethylmorpholine, 4-ethylmorpholine, 4-acylmorpholine (4-formylmorpholine, 4-acetylmorpholine, 4-propionyl ... Examples of the cyclic amines include saturated cyclic amines having a 5- to 6-membered ring containing one or more nitrogen atoms, such as 4-butanoylmorpholine, 4-pentanoylmorpholine, 4-hexanoylmorpholine, 4-heptanoylmorpholine, 4-octanoylmorpholine, 4-nonanoylmorpholine, 4-decanoylmorpholine, 4-undecanoylmorpholine, and 4-dodecanoylmorpholine, 1-methylpiperazine, 1,4-dimethylpiperazine, 1-ethylpiperazine, and 1-formylpiperazine. Among these, 4-formylmorpholine is preferred.

[0021] Of these, (c) the polar solvent is preferably one or more selected from the group consisting of dimethyl sulfoxide, methanol, 3-methoxy-N,N-dimethylpropanamide, propylene carbonate, and 4-formylmorpholine, and more preferably dimethyl sulfoxide or methanol.

[0022] In the aqueous herbicidal composition of the present invention, the content of the polar solvent (c) is preferably from 0.05 to 10 mass %, more preferably from 0.1 to 8 mass %, and even more preferably from 1 to 5 mass %.

[0023] The aqueous herbicidal composition of the present invention may further contain a polar solvent other than the above-mentioned polar solvent. The other polar solvent is not particularly limited as long as it is a solvent that is well miscible with water and the above-mentioned polar solvent.

[0024] [(d) Surfactant] Examples of the surfactant of component (d) include (A) nonionic surfactants, (B) anionic surfactants, (C) cationic surfactants, (D) amphoteric surfactants, and (E) other surfactants.

[0025] [(A) Nonionic surfactant] Examples of the (A) nonionic surfactant include (A-1) polyalkylene glycol type surfactant, (A-2) polyhydric alcohol type surfactant, and (A-3) acetylene type surfactant.

[0026] Examples of (A-1) polyalkylene glycol surfactants include (A-1-1) polyoxyalkylene alkyl ethers, (A-1-2) polyoxyalkylene styryl phenyl ethers, and (A-1-3) other polyalkylene glycol surfactants.

[0027] (A-1-1) Polyoxyethylene alkyl ether is a compound represented by the following formula (1). R 1 (CH2CH2O) p H (1)

[0028] In formula (1), R 1is an alkyl group having 2 to 24 carbon atoms, and specific examples thereof include an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecyl group, an icosyl group, and a henicosyl group. The alkyl group preferably has a carbon number of 10 to 16, and more preferably has a carbon number of 11, 12, 13, 14, or 15. p is usually an integer of 2 to 100. The lower limit of p is preferably 2 or more and 5 or more, and the upper limit is preferably 25 or less, 20 or less, 15 or less, and 10 or less, more preferably 5 to 10, and particularly preferably 6, 7, 8, or 9. Specific examples of the compound represented by formula (1) include polyoxyethylene alkyl (e.g., C 8~18 ) ethers.

[0029] Examples of the polyoxyalkylene styryl phenyl ether (A-1-2) include polyoxyethylene (mono-, di-, or tri-)styryl phenyl ether, polyoxypropylene (mono-, di-, or tri-)styryl phenyl ether, polymers of polyoxyethylene (mono-, di-, or tri-)styryl phenyl ether, polyoxyethylene polyoxypropylene (mono-, di-, or tri-)styryl phenyl ether, and the like.

[0030] (A-1-3) Other polyalkylene glycol surfactants include, for example, ethylene oxide adducts of alkyl naphthols, polyoxyethylene (mono- or di-) alkyl (e.g., C 8~12 ) phenyl ether, polyoxyethylene (mono or di) alkyl (e.g., C 8~12)phenyl ether formalin condensation products, polyoxyethylene (mono-, di- or tri-)phenyl ether, polyoxyethylene (mono-, di- or tri-)benzyl phenyl ether, polyoxypropylene (mono-, di- or tri-)benzyl phenyl ether, polyoxyethylene polyoxypropylene block polymers, alkyl (e.g., C 8~18 ) polyoxyethylene polyoxypropylene block polymer ether, alkyl (e.g. C 8~12 ) phenyl polyoxyethylene polyoxypropylene block polymer ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene bisphenyl ether, polyoxyethylene resin acid ester, polyoxyethylene fatty acid (e.g. C 8~18 ) monoesters, polyoxyethylene fatty acids (e.g. C 8~18 ) diesters, polyoxyethylene sorbitan (mono, di or tri) fatty acids (e.g., C 8~18 ) esters, glycerol fatty acid ester ethylene oxide adducts, castor oil ethylene oxide adducts, hydrogenated castor oil ethylene oxide adducts, alkyl (e.g. C 8~18 ) amine ethylene oxide adducts, fatty acids (e.g. C 8~18 ) amide ethylene oxide adducts, etc.

[0031] (A-2) Examples of polyhydric alcohol surfactants include glycerol fatty acid esters, polyglycerin fatty acid esters, pentaerythritol fatty acid esters, sorbitol fatty acids (e.g., C 8~18 ) esters, sorbitan (mono, di or tri) fatty acids (e.g. C 8~18 ) esters, sucrose fatty acid esters, polyhydric alcohol alkyl ethers, alkyl glycosides, alkyl polyglycosides, fatty acid alkanolamides, etc.

[0032] (A-3) Examples of the acetylene surfactant include acetylene glycol, acetylene alcohol, an ethylene oxide adduct of acetylene glycol, and an ethylene oxide adduct of acetylene alcohol.

[0033] Examples of the (B) anionic surfactant include (B-1) a carboxylic acid type surfactant, (B-2) a sulfate type surfactant, (B-3) a sulfonic acid type surfactant, and (B-4) a phosphate type surfactant.

[0034] Examples of the (B-1) carboxylic acid type surfactant include polyacrylic acid, polymethacrylic acid, polymaleic acid, polymaleic anhydride, copolymers of maleic acid or maleic anhydride and olefins (e.g., isobutylene and diisobutylene), copolymers of acrylic acid and itaconic acid, copolymers of methacrylic acid and itaconic acid, copolymers of maleic acid or maleic anhydride and styrene, copolymers of acrylic acid and methacrylic acid, copolymers of acrylic acid and methyl acrylate, copolymers of acrylic acid and vinyl acetate, copolymers of acrylic acid and maleic acid or maleic anhydride, polyoxyethylene alkyl (e.g., C 8~18 ) ether acetates, N-methyl-fatty acids (e.g. C 8~18 ) sarcosinates, resin acids, fatty acids (e.g. C 8~18 ) and salts of the above carboxylic acids.

[0035] (B-2) Examples of the sulfate ester surfactant include alkyl (e.g., C 8~18 ) sulfate ester, polyoxyethylene alkyl (e.g. C 8~18 ) ether sulfate ester, polyoxyethylene (mono or di) alkyl (e.g., C 8~12 ) phenyl ether sulfate, polyoxyethylene (mono or di) alkyl (e.g., C 8~12)phenyl ether polymer sulfate, polyoxyethylene (mono-, di-, or tri-)phenyl phenyl ether sulfate, polyoxyethylene (mono-, di-, or tri-)benzyl phenyl ether sulfate, polyoxyethylene (mono-, di-, or tri-)styryl phenyl ether sulfate, sulfate of polyoxyethylene (mono-, di-, or tri-)styryl phenyl ether polymer, sulfate of polyoxyethylene polyoxypropylene block polymer, sulfated oil, sulfated fatty acid ester, sulfated fatty acid, sulfated olefin, and salts of the above sulfates.

[0036] Among these, the polyoxyethylene alkyl ether sulfate in the polyoxyethylene alkyl ether sulfate and its salt is a compound represented by the following formula (2). R 2 O(CH2CH2O) q SO3H (2)

[0037] In formula (2), R 2 is an alkyl group having 1 to 24 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-pentyl group, an isopentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecyl group, an icosyl group, or a henicosyl group, preferably a linear or branched alkyl group having 10 to 16 carbon atoms, more preferably a linear or branched alkyl group having 11, 12, 13, 14, or 15 carbon atoms. q is usually an integer of 2 to 100. The lower limit of q is preferably 2 or more and 5 or more, in that order, and the upper limit is preferably 25 or less, 20 or less, 15 or less and 10 or less, in that order, more preferably 5 to 10, and particularly preferably 6, 7, 8 or 9.

[0038] Examples of salts of polyoxyethylene alkyl ether sulfates include alkali metal salts such as sodium, potassium and lithium; alkaline earth metal salts such as magnesium and calcium; and amine salts such as ammonia, triethanolamine and triethylamine.

[0039] (B-3) Examples of sulfonic acid surfactants include paraffin (e.g., C 8~22 ) sulfonic acid, alkyl (e.g. C 8~12 ) benzenesulfonic acid, alkyl (e.g. C 8~12 ) formalin condensation products of benzenesulfonic acid, formalin condensation products of cresolsulfonic acid, α-olefins (e.g. C 8~16 ) sulfonic acid, dialkyl (e.g. C 8~12 ) sulfosuccinic acid, lignosulfonic acid, polyoxyethylene (mono or di) alkyl (e.g., C 8~12 ) phenyl ether sulfonic acid, polyoxyethylene alkyl (e.g. C 8~18 ) ether sulfosuccinic acid half ester, naphthalene sulfonic acid, (mono or di) alkyl (e.g. C 1~6 ) naphthalenesulfonic acid, formalin condensation products of naphthalenesulfonic acid, (mono- or di-) alkyl (e.g. C 1~6 ) formalin condensation products of naphthalene sulfonic acid, formalin condensation products of creosote oil sulfonic acid, alkyl (e.g. C 8~12 ) Sulfonic acids such as diphenyl ether disulfonic acid, Igepon T (trade name), polystyrene sulfonic acid, copolymers of styrene sulfonic acid and methacrylic acid, and salts of the above sulfonic acids.

[0040] (B-4) Examples of the phosphate ester surfactant include alkyl (e.g., C 8~12 ) phosphate ester, polyoxyethylene alkyl (e.g. C 8~18 ) ether phosphate ester, polyoxyethylene (mono or di) alkyl (e.g., C 8~12 ) phenyl ether phosphate ester, polyoxyethylene (mono, di or tri) alkyl (e.g., C 8~12)phenyl ether polymer phosphate ester, polyoxyethylene (mono-, di-, or tri-)phenylphenyl ether phosphate ester, polyoxyethylene (mono-, di-, or tri-)benzyl phenyl ether phosphate ester, polyoxyethylene (mono-, di-, or tri-)styryl phenyl ether phosphate ester, polyoxyethylene (mono-, di-, or tri-)styryl phenyl ether polymer phosphate ester, polyoxyethylene polyoxypropylene block polymer phosphate ester, phosphatidylcholine, phosphatidylethanolimine, condensed phosphoric acid (e.g., tripolyphosphoric acid, etc.), and salts of the above phosphate esters.

[0041] Counter ions of the salts in (B-1) to (B-4) include alkali metals (lithium, sodium, potassium, etc.), alkaline earth metals (calcium, magnesium, etc.), and various amines (for example, ammonia, alkylamines, cycloalkylamines, alkanolamines, etc.).

[0042] Examples of the (C) cationic surfactant include alkylamines, alkyl quaternary ammonium salts, ethylene oxide adducts of alkylamines, and ethylene oxide adducts of alkyl quaternary ammonium salts.

[0043] Examples of the amphoteric surfactant (D) include (D-1) betaine type surfactants, (D-2) amino acid type surfactants, and (D-3) amine oxide type surfactants.

[0044] (D-1) Examples of betaine surfactants include alkyl (e.g., C 8~18 ) Dimethylaminoacetic acid betaine, acyl (e.g. C 8~18 ) Aminopropyl dimethylaminoacetic acid betaine, alkyl (e.g. C 8~18 ) Hydroxysulfobetaine, 2-alkyl (e.g. C 8~18 )-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine and the like.

[0045] (D-2) Amino acid type surfactants: For example, alkyl (e.g., C 8~18 ) aminopropionic acid, alkyl (e.g. C 8~18 ) Aminodipropionic acid, N-acyl (e.g. C 8~18 )-N'-carboxyethyl-N'-hydroxyethylethylenediamine and the like.

[0046] (D-3) Amine oxide surfactants: For example, alkyl (e.g., C 8~18 ) dimethylamine oxide, acyl (e.g. C 8~18 ) aminopropyl dimethylamine oxide, etc.

[0047] (E) Other surfactants include (E-1) silicon-based surfactants and (E-2) fluorine-based surfactants.

[0048] Examples of the (E-1) silicon-based surfactants include polyoxyethylene-methylpolysiloxane copolymers, polyoxypropylene-methylpolysiloxane copolymers, and poly(oxyethylene-oxypropylene)-methylpolysiloxane copolymers.

[0049] (E-2) Examples of fluorine-based surfactants include perfluoroalkenylbenzenesulfonates, perfluoroalkylsulfonates, perfluoroalkylcarboxylates, perfluoroalkenylpolyoxyethylene ethers, perfluoroalkylpolyoxyethylene ethers, and perfluoroalkyltrimethylammonium salts.

[0050] The surfactants (A), (B), (C), (D) and (E) may be used singly or in combination of two or more kinds.

[0051] Of these, (d) the surfactant preferably includes one or more selected from the group consisting of polyoxyethylene castor oil, alkyl sulfates and their salts, polyoxyalkylene alkyl ethers, alkylbenzene sulfonic acids and their salts, polyoxyethylene alkyl ether phosphates and their salts, and polyoxyethylene alkyl ether sulfates and their salts.

[0052] (d) In the case where two or more types of surfactants are contained, it is preferable that the surfactant contains polyoxyethylene castor oil and one or more types selected from the group consisting of alkyl sulfates and their salts, polyoxyalkylene alkyl ethers, alkylbenzene sulfonic acids and their salts, polyoxyethylene alkyl ether phosphates and their salts, and polyoxyethylene alkyl ether sulfates and their salts, and it is more preferable that the surfactant contains polyoxyethylene castor oil and one or more types selected from the group consisting of polyoxyalkylene alkyl ethers, and polyoxyethylene alkyl ether sulfates and their salts.

[0053] In the aqueous herbicide composition of the present invention, the content of the surfactant (d) is preferably 1 to 20 mass%, more preferably 3 to 15 mass%, and even more preferably 5 to 13 mass%. When the aqueous herbicide composition contains two or more kinds of surfactants (d), the content of polyoxyethylene castor oil in the surfactants (d) is preferably 1 to 12 mass%, and more preferably 2 to 6 mass%.

[0054] [(e)Water] The content of water in component (e) can be the remainder after excluding the above-mentioned components and the auxiliary components described below from the aqueous herbicidal composition of the present invention.

[0055] [Other ingredients (auxiliary ingredients)] The aqueous herbicidal composition of the present invention may further contain various auxiliary components. Examples of the auxiliary components include antifreeze agents, pH adjusters, antidecomposition agents, colorants, antifoaming agents, preservatives, etc. The content of these is not particularly limited as long as it does not impair the effects of the present invention.

[0056] As the antifreeze agent, for example, ethylene glycol, diethylene glycol, propylene glycol, glycerin, etc., can be used. Among these, propylene glycol or glycerin is preferred.

[0057] Examples of pH adjusters include sodium carbonate, sodium bicarbonate, potassium carbonate, sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium borate, hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, citric acid, acetic acid, oxalic acid, phthalic acid, benzoic acid, succinic acid, ethylenediaminetetraacetic acid, sodium citrate, disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, and potassium dihydrogen phosphate.

[0058] The defoaming agent may be, for example, a silicone emulsion.

[0059] Examples of the preservative include isothiazoline-based preservatives such as 2-n-octyl-4-isothiazolin-3-one, 5-dichloro-2-n-octyl-4-isothiazolin-3-one, 1,2-benzisothiazolin-3-one, and Nn-butyl-1,2-benzisothiazolin-3-one; 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), 3-(3,4-dichlorophenyl)-1-methyl-1-methoxyurea, and 3-(3,4-dichlorophenyl)-1-(2 -methylcyclohexyl), 3-phenyl-1-(2-methylcyclohexyl)urea, 3-(phenyldimethylmethyl)-1-(4-methylphenyl)urea and other urea-based compounds; 2-chloro-4,6-bis(ethylamino)-1,3,5-triazine, 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine, 2-methylthio-4,6-bis(ethylamino)-S-triazine, 2-methylthio-4-ethylamino-6-isopropylamino- S-triazine, 2-methylthio-4,6-bis(isopropylamino)-S-triazine, 2-methylthio-4-tert-butylamino-6-cyclopropylamino-S-triazine, N'-tert-butyl-N-cyclopropyl-6-(methylthio)-1,3,5-triazine-2,4-diamine and other triazines; tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetraisopropylthiuram disulfide, dipyrrolidone Thiuram disulfide-based compounds such as thiuram disulfide and polyethylene thiuram disulfide; benzimidazole-based compounds such as 2-(4-thiazyl)benzimidazole and 2-(carbomethoxyamino)benzimidazole; pyridine-based compounds such as 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine; zinc pyrithione-based compounds such as zinc-2-pyridinethiol-1-oxide; thiazole-based compounds such as 2-(4-thiocyanomethylthio)benzothiazole;Examples of the organic halogen-based, organic metal-based, haloalkylthio-based, phenols (e.g., phenol, thymol, chlorophenol, bromophenol, chlorobromophenol, cresol, guaiacol, O-phenylphenol, xylenol, phenolsulfonic acid, resorcin, pyrogallol, phenoxyethanol), carboxylic acids or their salts or esters (e.g., benzoic acid, sodium benzoate, monobromoacetic acid ester, p-hydroxybenzoic acid ester, sorbic acid, potassium sorbate, sorbic acid ester), etc.;

[0060] The aqueous herbicide composition of the present invention has a pH at room temperature of preferably 3.0 to 8.0, more preferably 4.0 to 6.0. The pH can be adjusted by increasing or decreasing the content of a pH adjuster used in the aqueous herbicide composition of the present invention.

[0061] The form of the aqueous herbicidal composition of the present invention is not particularly limited as long as it contains water and is a clear liquid, and examples thereof include a soluble concentrate and a microemulsion.

[0062] The method for producing the aqueous herbicidal composition of the present invention is not particularly limited, but may be, for example, a method in which the above-mentioned components are added to water, stirred, mixed, and dissolved uniformly.

[0063] The aqueous herbicidal composition of the present invention can be used, for example, in fallow paddy fields, paddy field ridges, orchards, pastures, forests, non-agricultural land, and the like.

[0064] The aqueous herbicidal composition of the present invention can be sprayed onto weeds or their surroundings, for example, before or after emergence of the weeds.

[0065] The aqueous herbicidal composition of the present invention can be used to control various weeds. For example, weeds include bindweed, knotweed, dock, purslane, chickweed, lamb's quarter, radish, field mustard, shepherd's purse, cardamom, American hornwort, sickleberry, velvet, American sedge, field pansy, cleaver, American morning glory, round morning glory, European bindweed, lamiaceae, amplexicaule, white morning glory, white morning glory, dogweed, and sedge. Chinese lantern plant, common persimmon, cocklebur, sow poppy, sunflower, chamomile, corn marigold, mugwort, common ragwort, solidago altissima, wheatgrass, barnyard millet, barnyard grass, American pasgrass, green foxtail, crabgrass, annual bluegrass, black foxtail, oats, oats, western sorghum, quackgrass, horsebrook, common burdock, Japanese burdock, Japanese burdock, Japanese bean grass, Skimmers, Miscanthus species, Bamboo grass, Imperata japonica, Common reeds, Dayflower, Japanese laurel, Nutsedge, Amaranth, Planchnaceae, Rapeseed, Dutch gelatin, Morning glory, Broom tree, Mallow, Polygonum, Purslane, Russian thistle, Siberian laurel, Field mustard, Cocklebur, Bidens frondosa, Chenopodium album, Carpet grass, Goosegrass, Ryegrass, Rice, Brachiaria, Dayflower, Wheat, Tomato It can be used to control corn, mugwort, milkweed, Siberian fox thistle, European bindweed, kudzu, white clover, American pokeweed, Chinese larkspur, yellow nutsedge, nutsedge, quackgrass, Imperata cylindrica, perennial ryegrass, guineagrass, dallisgrass, reeds, Johnsongrass, reed canary grass, cattail, horsetail, bracken, blackberry, juniper, etc.

[0066] The aqueous herbicidal composition of the present invention can exhibit various herbicidal effects by adjusting the types and amounts of components (such as surfactants) to be combined with the active ingredient, and examples of such effects include high herbicidal effect, rapid herbicidal effect, and long-term herbicidal effect.

[0067] A high herbicidal effect means that when the aqueous herbicide composition of the present invention is applied to a certain area, it kills most of the weeds present in the area. Some aqueous herbicide formulations currently in use do not fully exert the herbicidal activity of the active ingredient, resulting in a decrease in herbicidal effect. The aqueous herbicide composition of the present invention does not show a decrease in herbicidal effect.

[0068] The term "fast-acting herbicidal effect" means that, for example, the herbicidal effect is exerted within several hours to several days after application of the aqueous herbicidal composition of the present invention. In the case of the aqueous herbicidal composition of the present invention, the fast-acting herbicidal effect is exerted by adjusting the type and amount of a specific surfactant, for example, a nonionic surfactant, as the surfactant.

[0069] The term "long-term herbicidal effect" means that, for example, after application of the aqueous herbicidal composition of the present invention, a high herbicidal effect is maintained for 3 weeks or more, preferably 1 month or more.

[0070] The aqueous herbicidal composition of the present invention is a composition that can be directly sprayed on weeds, and has a clear, single-layer appearance. "Clear" refers to a state free of turbidity, crystals, residual matter, impurities, etc.

[0071] The aqueous herbicide composition of the present invention has a viscosity suitable for direct spraying, and therefore is easily discharged from a spray container, with little residue remaining in the container.

[0072] The aqueous herbicide composition of the present invention is a composition having excellent storage stability. In particular, even after the aqueous herbicide composition of the present invention is stored for a certain period of time (for example, 7 days) at a low temperature (for example, 2 to -5°C) such as in a cold region, it does not become turbid, crystallize, separate into layers, or show a significant increase in viscosity. EXAMPLES

[0073] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0074] [1] Preparation of aqueous herbicide composition [Example 1] 0.26 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of methanol and 6 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 90.00 parts by mass of water by stirring to obtain a homogeneous solution. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed with the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0075] [Example 2] 0.26 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of dimethyl sulfoxide and 6 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 90.00 parts by mass of water by stirring to obtain a homogeneous solution. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed with the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0076] [Example 3] 0.26 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of methanol and 3 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 93.00 parts by mass of water by stirring to obtain a homogeneous solution. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed with the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0077] [Example 4] 0.26 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of dimethyl sulfoxide and 3 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 93.00 parts by mass of water by stirring to obtain a homogeneous solution. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed with the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0078] [Example 5] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved by stirring in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), 2 parts by mass of polyoxyethylene lauryl ether (trade name: Pegnol TH-8, manufactured by Toho Chemical Industry Co., Ltd.), and 5 parts by mass of polyoxyethylene lauryl ether sulfate (trade name: Hitenol LA-10, manufactured by Toho Chemical Industry Co., Ltd.) to obtain a homogeneous solution. The solution was mixed with 87.08 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

[0079] [Example 6] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved by stirring in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), 2 parts by mass of polyoxyethylene lauryl ether (trade name: Pegnol TH-8, manufactured by Toho Chemical Industry Co., Ltd.), and 3 parts by mass of polyoxyethylene alkyl ether sulfate (trade name: Sorpol 7976, manufactured by Toho Chemical Industry Co., Ltd.) to obtain a homogeneous solution. The solution was mixed with 89.08 parts by mass of water by stirring to obtain a homogeneous solution. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed into the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0080] [Example 7] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved by stirring in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), and 6 parts by mass of polyoxyethylene lauryl ether sulfate (trade name: Hitenol LA-10, manufactured by Toho Chemical Industry Co., Ltd.) to obtain a homogeneous solution. The solution was mixed with 88.08 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

[0081] [Example 8] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), and 6 parts by mass of polyoxyethylene alkyl ether sulfate (trade name: Sorpol 7976, manufactured by Toho Chemical Industry Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 88.08 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

[0082] [Example 9] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), and 5 parts by mass of polyoxyethylene lauryl ether (trade name: DKS NL-90, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 89.08 parts by mass of water by stirring to obtain a homogeneous solution. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed with the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0083] [Example 10] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), and 7 parts by mass of polyoxyethylene lauryl ether (trade name: Pegnol TH-8, manufactured by Toho Chemical Industry Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 87.08 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

[0084] [Example 11] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved by stirring in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), 4 parts by mass of alkylbenzene sulfonate metal salt (trade name: New Calgen A-41B, manufactured by Takemoto Oil & Fat Co., Ltd.), and 1 part by mass of polyoxyethylene lauryl ether phosphate ester (trade name: Plysurf A219B, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) to obtain a homogeneous solution. The solution was mixed with 89.08 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

[0085] [Example 12] 0.18 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of dimethyl sulfoxide, 2 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.), and 5 parts by mass of alkyl sulfate metal salt (trade name: New Calgen LX-C, manufactured by Takemoto Oil Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 89.08 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

[0086] [Example 13] 0.26 parts by mass of triaziflam (purity 97.1% by mass) was dissolved by stirring in 2 parts by mass of 3-methoxy-N,N-dimethylpropanamide (trade name: KJCMPA-100, manufactured by KJ Chemicals Co., Ltd.) and 6 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) to obtain a homogeneous solution. The solution was mixed with 90.00 parts by mass of water by stirring to obtain a homogeneous solution. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed into the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0087] [Example 14] 0.26 parts by mass of triaziflam (purity 97.1% by mass) was dissolved in 2 parts by mass of a mixture of morpholine derivative and propylene carbonate (trade name: Armid FMPC, manufactured by Akzo Nobel) and 6 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) by stirring to obtain a homogeneous solution. The solution was mixed with 90.00 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

[0088] [Comparative Example 1] 0.21 parts by mass of triaziflam (purity 97.1% by mass) was added to 2 parts by mass of propylene glycol and 6 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) and mixed. The solution was mixed with 90.05 parts by mass of water by stirring. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed into the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0089] [Comparative Example 2] 0.21 parts by mass of triaziflam (purity 97.1% by mass) was added to 2 parts by mass of dipropylene glycol and 6 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) and mixed. The solution was mixed with 90.05 parts by mass of water by stirring. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed into the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0090] [Comparative Example 3] 0.21 parts by mass of triaziflam (purity 97.1% by mass) was added to 2 parts by mass of diethylene glycol and 6 parts by mass of polyoxyethylene castor oil (trade name: Sorpol CA-42, manufactured by Toho Chemical Industry Co., Ltd.) and mixed. The solution was mixed with 90.05 parts by mass of water by stirring. 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.1 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) were mixed into the solution to obtain 100 parts by mass of an aqueous herbicide composition.

[0091] [2] Appearance evaluation of aqueous herbicide compositions The appearance of the aqueous herbicidal compositions obtained in Examples 1 to 14 and Comparative Examples 1 to 3 was visually observed. The results are shown in Table 1.

[0092] [Table 1]

[0093] [3] Storage stability test 20 mL of the aqueous herbicide composition of the present invention obtained in Examples 1 to 14 was placed in a 30 mL glass container, covered, and allowed to stand in a thermostatic chamber at -5°C for 7 days. The appearance of the aqueous herbicide composition of the present invention after standing was visually observed. The results are shown in Table 2.

[0094] [Table 2]

[0095] From the results shown in Tables 1 and 2, it was confirmed that in Comparative Examples 1, 2, and 3, triaziflam was not dissolved in the formulation, resulting in a cloudy white color, whereas in Examples 1 to 14, aqueous herbicide compositions with a clear appearance were obtained and could be stably stored even under low-temperature conditions of -5°C.

[0096] [Reference example 1] 0.25 parts by mass of flupoxam (purity 98.7% by mass) was dissolved by stirring in 2 parts by mass of methanol, 5 parts by mass of polyoxyethylene sorbitan monolaurate (trade name: Sorbon T-20, manufactured by Toho Chemical Industry Co., Ltd.), 2 parts by mass of polyoxyethylene lauryl ether (trade name: Pegnol TH-8, manufactured by Toho Chemical Industry Co., Ltd.), and 3 parts by mass of polyoxyethylene alkyl ether sulfate (trade name: Sorpol 7976, manufactured by Toho Chemical Industry Co., Ltd.) to obtain a homogeneous solution. The solution was mixed with 86.06 parts by mass of water by stirring to obtain a homogeneous solution. The solution was mixed with 1.64 parts by mass of an aqueous solution of potassium salt of N-(phosphonomethyl)glycine (purity 58.71% by mass) and 0.05 parts by mass of 1,2-benzoisothiazolin-3-one (trade name: Proxel GXL (S), manufactured by Arcsada Japan Co., Ltd.) to obtain 100 parts by mass of an aqueous herbicide composition.

Claims

1. 1. An aqueous herbicide composition comprising: (a) an amino acid-based herbicidal active ingredient; (b) triaziflam; (c) one or more polar solvents selected from dialkyl sulfoxides, monohydric alcohols, carboxylic acid amides, carbonate esters, and cyclic amines; (d) a surfactant; and (e) water.

2. 2. The aqueous herbicidal composition according to claim 1, wherein the amino acid-based herbicidal active ingredient (a) is one or more selected from the group consisting of salts of N-(phosphonomethyl)glycine, salts of glufosinate and salts of bialaphos.

3. 3. The aqueous herbicidal composition according to claim 2, wherein (a) the amino acid type herbicidal active ingredient is a salt of N-(phosphonomethyl)glycine.

4. The aqueous herbicidal composition according to claim 1, wherein the polar solvent (c) is one or more selected from the group consisting of dimethyl sulfoxide, methanol, 3-methoxy-N,N-dimethylpropanamide, propylene carbonate and 4-formylmorpholine.

5. 5. The aqueous herbicidal composition according to claim 4, wherein (c) the polar solvent is dimethyl sulfoxide or methanol.

6. The aqueous herbicidal composition according to any one of claims 1 to 5, wherein the surfactant (d) is one or more selected from the group consisting of polyoxyethylene castor oil, alkyl sulfates and their salts, polyoxyalkylene alkyl ethers, alkylbenzene sulfonic acids and their salts, polyoxyethylene alkyl ether phosphates and their salts, and polyoxyethylene alkyl ether sulfates and their salts.

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