WO2007018160A1 - Aqueous suspension-type herbicide composition - Google Patents

Abstract

The object is to prepare an aqueous suspension-type herbicide composition which can avoid the decomposition of a herbicidal sulfonylurea compound in water and can also retain a stable suspension state, without the need of using any complicated step. An aqueous suspension-type herbicide composition comprising: (1) at least one herbicidal sulfonylurea compound selected from the group consisting of 1-[3-[(4,6-dimethoxypyrimidin- 2-ylcarbamoyl)sulfamoyl]-2-pyridyl]-2-fluoropropyl methoxyacetate, N-[(4,6-dimethoxypyrimidin-2- yl)aminocarbonyl]-2-(2-fluoro-1-hydroxypropyl)-3- pyridinesulfonamide and salts thereof; (2) an inorganic salt; (3) at least one sulfonate salt selected from the group consisting of an arylsulfonate, an alkylarylsulfonate and formalin condensates thereof; and (4) water.

Description

 Specification

 Aqueous suspension herbicidal composition

 Technical field

 [0001] The present invention relates to an aqueous suspension herbicidal composition in which the herbicidal sulfo-urea compound or a salt thereof is inhibited from being decomposed in water and stable suspension is maintained.

 Background art

 [0002] So far, various herbicides have been developed and put to practical use for the purpose of crop protection in cultivated land and weed control in non-agricultural land. In general, these herbicides are applied in the form of solid powders, granules, and other solid preparations that are sprayed by diluting in water at the time of use, such as power wettable powders and granular wettable powders. Alternatively, it may be a liquid suspension formulation in which an active ingredient is suspended in water, vegetable oil, etc., together with a surfactant, etc. and diluted with water at the time of use.

 [0003] Among these, when handling a preparation directly spraying solids or a solid preparation used by diluting in water, the user may inhale the solids that have risen into the air during use. A liquid suspension formulation is desirable to avoid. In order to easily measure and adjust the amount of drug product because the area to be sprayed is different from the area per package of the drug product, the scale on the drug product bottle can be easily adjusted. The liquid preparation that can be used is more advantageous than the solid preparation that requires a weighing machine such as a balance to measure the weight. Of the liquid suspension formulations, those suspended in vegetable oil are often used for cultivated cereals. However, when a formulation suspended in vegetable oil is used on non-agricultural land such as roads, railways, factory grounds, playgrounds, orchards, and mulberry fields, vegetable oil components remain on the ground after spraying. It may be inconvenient to use the site after spraying. Furthermore, the organic solvent used in the emulsion is preferably not used as much as possible from the viewpoint of the effect on the surrounding environment to be applied or the flammability of the preparation, or even if used, the amount is preferably as small as possible. It is desired to prepare an aqueous suspension herbicidal composition that is stably suspended in water!

[0004] On the other hand, a sulfonylurea compound as a compound blended as an active ingredient of a herbicide Alternatively, the salt is a compound that exhibits an excellent herbicidal effect at a relatively small application amount, and is therefore used as an active ingredient in many herbicides. However, sulfo-urea compounds or their salts formulated as herbicidal active ingredients generally have a property that they are easily decomposed during storage. If the active ingredient concentration in the formulation decreases due to their decomposition, the herbicidal effect expected at the time of application cannot be exhibited, or the internal pressure of the suspension storage container is stored due to gas generation due to decomposition. May be high inside. As a result, the suspension liquid blows out at the time of opening, and the contents may cause various inconveniences such as contamination of workers and surroundings.

 [0005] So far, it has been studied to add various compounds in order to prevent decomposition of the sulfonylurea compound or its salt blended as an active herbicidal ingredient. For example, Japanese Patent Application Laid-Open No. 2000-159603 discloses an aqueous suspension herbicidal composition containing a herbicidal sulfo-lurea compound and phenol sulfonate or a formalin condensate thereof.

 [0006] JP-A-59-205305 discloses an aqueous suspension herbicidal composition comprising a herbicidal sulfo-urea compound salt and an ammonium or alkali metal salt of a carboxylic acid or inorganic acid. It is disclosed. Specifically, at the time of producing the aqueous suspension herbicidal composition, the herbicidal sulfonylurea compound and the surfactant are mixed in water, and then added to the carboxylic acid or inorganic acid ammonium salt or alkali. It is disclosed that by adding a metal salt, a herbicidal sulfonylurea compound salt is formed and precipitated, and the precipitated herbicidal sulfonylurea compound salt is dispersed in water by a wet pulverizer or the like. Yes.

 [0007] Further, Patent No. 3,175,850 discloses preparing an aqueous suspension preparation of pyrazosulfuron using an inorganic acid, an organic acid or a buffer.

 [0008] Patent Document 1: JP 2000-159603 A

 Patent Document 2: JP 59-205305 A

 Patent Document 3: Japanese Patent No. 3,175,850

 Disclosure of the invention

 Problems to be solved by the invention

[0009] Even when the above-described prior art is applied, the herbicidal sulfonylurea compound, which is an active ingredient used in the present invention, is easily decomposed in water or produced as a suspension thereof. Since the process is complicated, practical examples have been seldom seen. Therefore, it is desired to prepare an aqueous suspension herbicidal composition that does not decompose a herbicidal sulfonylurea compound in water and maintains a stable suspended state without going through complicated steps.

 Means for solving the problem

 [0010] The present inventors have conducted various studies to solve the above problems. As a result, by using an inorganic salt and a sulfonate salt as a specific surfactant, the herbicidal sulfo-urea compound does not decompose in water and maintains an aqueous suspension herb. The present inventors have found that the composition can be prepared without going through complicated steps and completed the present invention.

 [0011] That is, the present invention relates to (1) 1- [3-— [(4,6 dimethoxypyrimidine-2-ylcarbamoyl) sulfamoyl] -2-pyridyl] -2-fluoropropyl methoxyacetate, N-[(4, 6 dimethoxypyrimidine 2-yl) aminocarbol] — 2— (2 fluoro 1-hydroxypropyl) — 3-pyridinesulfonamides and their salt strength group power at least one herbicidal sulfonyl selected Urea compounds, (2) inorganic salts, (3) at least one sulfonate selected from the group consisting of aryl sulfonates, alkyl aryl sulfonates and their formalin condensates, and (4) The present invention relates to an aqueous suspension herbicidal composition containing water, and a method for controlling undesired plants or suppressing the growth thereof using the composition.

 [0012] Further, the present invention provides an aqueous solution using an inorganic salt and an arylene sulfonate, an alkylaryl sulfonate, and at least one sulfonic acid salt selected from the group strength of their formalin condensate. 1 [3— [(4,6 Dimethoxypyrimidine—2-ylcarbamoyl) sulfamoyl] — 2-pyridyl] —2-fluoropropylmethoxyacetate, N— [(4,6 dimethoxy) in suspension herbicidal composition Pyrimidine 2-yl) aminocarbol] — 2-— (2 fluoro 1 hydroxypropyl) 3 At least one herbicidal sulfonylurea compound selected from the group consisting of pyridinesulfonamide and salts thereof. It is related with the method of stabilizing.

[0013] Further, the present invention provides at least (1) 1- [3-[(4,6 dimethoxypyrimidine-2-ylcarbamoyl) sulfamoyl] -2-pyridyl] -2-fluoropropyl methoxyacetate , N- [(4, 6 dimethoxypyrimidine 1-2-yl) aminocarbol] — 2— (2 fluoro — 1 hydroxypropyl) 1 3 pyridinesulfonamide and at least one selected from the group consisting of their salt strength At least one sulfonic acid selected from the group consisting of (2) inorganic salts, (3) aryl sulfonates, alkyl aryl sulfonates and their formalin condensates The present invention relates to a method for producing an aqueous suspension herbicidal composition by mixing a salt and (4) water and, if desired, wet milling.

 The invention's effect

 [0014] According to the present invention, an aqueous suspension herbicide in which the decomposition of the herbicidal sulfonylurea compound or a salt thereof is suppressed in the aqueous suspension herbicidal composition and the suspension of the preparation is sufficiently maintained. A composition and a herbicidal method using the composition can be provided. Furthermore, in the present invention, an aqueous suspension herbicidal composition can be prepared by mixing each component of the preparation and optionally wet-grinding, so that the active ingredient is once dissolved and reprecipitated. No manufacturing process is required.

 BEST MODE FOR CARRYING OUT THE INVENTION

[0015] The herbicidal sulfo-lurea compound used in the present invention is 1 [3— [(4,6-Dimethyoxypyrimidine-2-ylcarbamoyl) sulfamoyl] -2-cyclopyridyl] -2-fluoropropyl. Methoxy acetate, ie, generic name flucetosulforon (compound Al), N — [(4, 6 Dimethoxypyrimidine—2-yl) aminocarbo] — 2— (2 Fluoro 1 hydroxypropyl) 3 Pyridine sulfone It is an amide (hereinafter referred to as Compound A2) or a salt thereof. Examples of the salt include various salts. For example, salts with alkali metals such as sodium and potassium; salts with alkaline earth metals such as magnesium and calcium; salts with amines such as monomethylamine, dimethylamine and triethylamine.

 [0016] Various inorganic salts are used in the present invention. For example, there are alkali metal phosphates and alkaline earth metal phosphates. Of these, alkali metal phosphates are desirable, and among these, sodium dihydrogen phosphate and potassium dihydrogen phosphate are more desirable.

[0017] The alkyl moiety in the sulfonates used in the present invention may be a linear one. However, it may be branched. Examples thereof include those having C to c such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and the like.

 12

 [0018] Examples of the aryl moiety in the sulfonates include monocyclic or polycyclic compounds such as a benzene ring or a naphthalene ring.

[0019] Examples of the sulfonate salts include various salts. Examples include salts with alkali metals such as sodium and potassium; salts with alkaline earth metals such as magnesium and calcium.

 [0020] The sulfonates are preferably alkylaryl sulfonates or formalin condensates thereof, more preferably alkylbenzene sulfonates, alkyl naphthalene sulfonates, alkylbenzene sulfonate formalin condensates, It is an alkyl naphthalene sulfonate formalin condensate. Among these, alkylbenzene sulfonate formalin condensate and alkyl naphthalene sulfonate formalin condensate are more desirable.

 [0021] The aqueous suspension herbicidal composition of the present invention may contain various adjuvants as desired. Various adjuvants may be used as long as they are used in the technical field. For example, surfactants other than the sulfonates, solvents, anti-settling agents, thickeners, antifoaming agents, antifreezing agents, gelling agents, dispersion stabilizers, safeners, antifungal agents, antiseptics And inorganic ammonium salts. Specific examples of these various adjuvants include the following. The preparation of the preparation can be performed according to a usual method in the technical field.

[0022] Other surfactants include, for example, fatty acid salts, benzoates, alkylsulfosuccinates, dialkylsulfosuccinates, polycarboxylates, alkyl sulfate esters, alkyl sulfates, alkyl diglycol ether sulfates. , Alcohol sulfate, alkyl sulfonate, lignosulfonate, alkyl diphenyl ether disulfonate, polystyrene sulfonate, alkyl phosphate ester, alkyl aryl phosphate, styryl aryl phosphate Salt, polyoxyethylene alkyl ether sulfate ester salt, polyoxyethylene alkyl aryl ether sulfate salt, polyoxyethylene polystyrene Ruaryl ether sulfate, polyoxyethylene styryl aryl ether sulfate ammonium salt, polyoxyethylene alkyl aryl ether sulfate ester, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkyl aryl phosphate Steionic salts, polyoxyethylene styryl aryl ether phosphates or salts thereof, salts of phenolsulfonic acid formalin condensates, anionic surfactants such as alkyl maleate block polymers; sorbitan fatty acid esters, glycerin fatty acid esters Tellurium, fatty acid polydaricelide, fatty acid alcohol polydalicol ether, acetylene glycol, acetylene alcohol, oxyalkylene block polymer, polyoxyethylene alkyl ether, polyoxyethylene Tylene alkyl aryl ether, polyoxyethylene styryl ether, polyoxyethylene glycol alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glyceryl fatty acid ester, polyoxy Nonionic surfactants such as ethylene hydrogenated castor oil, polyoxyethylene castor oil, and polyoxypropylene fatty acid ester; and cationic surfactants such as alkoxy Louis aliphatic amine. If desired, two or more of these may be mixed as appropriate.

[0023] Examples of the anti-settling agent include silica, organic bentonite (Bentonite-alkylamino complex), bentonite, white carbon, and aluminum magnesium caustic acid. If desired, two or more of these may be mixed as appropriate.

 Examples of the thickener include heteropolysaccharides such as xanthan gum and guar gum; water-soluble polymers such as polybulal alcohol, sodium carboxymethylcellulose and sodium alginate; bentonite and white carbon. If desired, two or more of these may be mixed as appropriate.

[0024] Examples of the antifoaming agent include polydimethylsiloxane and acetylene alcohol. If desired, two or more of these may be mixed as appropriate.

 Examples of the antifreezing agent include ethylene glycol, propylene glycol, glycerin, urea and the like. If desired, two or more of these may be mixed as appropriate.

Examples of preservatives include formalin, parachlorometaxylenol, 1,2-benzisothia Zolin-3-one and the like. If desired, two or more of these may be mixed as appropriate.

[0025] Examples of the solvent include monohydric alcohols such as propanol and isobutanol; polyhydric alcohols such as ethylene glycol, propylene glycol, diethylene glycol, hexylene glycol, polyethylene glycol, polypropylene glycol, and glycerin; propyl Such as cellosolve, butylcerosolve, ferrulecetosolve, propylene glycol monomethino ethenore, propylene glycol monomethino enoate, propylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol monophenol ether Glycol ethers; Ethers such as dioxane; Ketones such as cyclohexanone and methyl isobutyl ketone; Fatty acids such as acetic acid and butyric acid Esters such as isopropyl acetate and butyl acetate; nitrogen-containing sulfur-containing solvents such as N-methylformamide, N-methylpyrrolidone, dimethyl sulfoxide, 1,3-dimethyl-2-imidazolidinone, amines and etheramines Aliphatic hydrocarbons such as normal paraffin and isoparaffin; aromatic hydrocarbons such as alkylbenzene, alkylnaphthalene, and phenylsilylethane. If desired, two or more of these may be used as appropriate.

 [0026] In the present invention, if desired, other herbicidal compounds other than the herbicidal sulfonylurea compound or a salt thereof can be mixed or used together, and in this case, a further excellent effect, May exhibit activity. For example, the range of applicable grass species, the timing of chemical treatment, herbicidal activity, etc. may be improved in the preferred direction. It should be noted that the herbicidal sulfo-lurea compound or its salt and other herbicidal compounds may be used separately in the form of a mixture prepared at the time of spraying. Use it as a turbid mixed herbicidal composition.

 The present invention includes the above-described aqueous suspension mixed herbicidal composition and a method for controlling undesired plants or suppressing the growth thereof using the composition. In addition, the present invention also includes a method for controlling undesired plants or suppressing the growth thereof by using separately prepared herbicidal sulfonylurea compounds or salts thereof and other herbicidal compounds. included.

[0027] Other herbicidal compounds can be selected as appropriate from, for example, the following compound groups (1) to (11) (generic names; some including those in the application for ISO). Even if there is no specific description, this When these compounds contain various structural isomers such as salts, alkyl esters and optical isomers, they are naturally included.

 [0028] (1) 2,4-D, 2,4-DB ゝ 2,4-DP ゝ MCPA, MCPB, MCPP, phenoxy systems such as naproanilide, clomeprop; 2,3 , 6-TBA, aromatic carboxylic acids such as dicamba, dichlobenil, picloram, triclopyr, clopyralid, aminopyralid; naptalam ), Benazolin, = quinclorac, nyanhook (quinmerac), diflufenzopynore, thiazopyr, etc. What is supposed to indicate.

[0029] (2) such as chlorotoluron, diuron, fluometuron, linuron, isoproturon, metobenzuron, tebuthiuron Urea: Simazine, atrazine, atratone, simetryn, prometryn, dimeththametryn, hexazinone, metribuzin, tenolebutyrazine, terbuthylazine , Nonazine (cyanazine), metrin (ametryn), nbutrin (cybutryne), triaziflam, propazine (propazine) and other triazines; System; propanil, cypromid and other arrid systems; swep, death Carnomate systems such as desmedipham and phenmedipham; hydroxybenzo-tolyl systems such as _{bromoxynil, bromoxynn-octanoate and} i _oxyn il A herbicidal activity that inhibits plant photosynthesis, such as pyridate, bentazone, amikabolezone, and methazole.

 [0030] (3) A quaternary ammonia such as paraquat or diquat, which is said to be a free radical in the plant itself, generating active oxygen and exhibiting rapid herbicidal efficacy. Salt system.

[0031] (4) Nitrofen, Chlomethoxyfen, Bife nox, Acifluorfen-sodium, Fomesafen , Dioxyethers such as oxyfluorfen, latofen, ethoxyfen-ethyl; chlorphthalim, flumioxazin, funole microlac pentinole ( Cyclic imides such as flumiclorac-pentyl, flutiacet-methyl; oxadiargyl, oxadiazon, sulfentrazone, carfentrazone-ethyl, thidazimine (thidiazimin), pentoxazone, azafenidin, isopropazole, pyraflufen-ethyl, benzfendizone, butafe nacil, meth Bentoslon (metobenzuron), Shidonetonore (cinidon—ethyl), Funore Plant chlorophyll biosynthesis such as flapoxam, fluazolate, profluazol, pyrachlonil, flufenpyr-ethyl, bencarbazone, etc. It is said to show herbicidal activity by inhibiting and abnormally accumulating photosensitized peroxide in the plant body.

[0032] (5) Pyridazinones such as norflurazon, chloridazon, metflur azon; pyrazolate, pyrazoxifene, benzofenap, topramezone, BAS -670H), pyrazoles such as pyrasulfotole; amitrol, fluridone (11 uridone), flurtamone, diflufenican, methoxyphenone, clomazone , Sulcotrione, mesotrione, AVH-301, isoxaflutole, difen zoquat, isoxachlorotole, benzobicyclon , Carotenoids such as picolinafen and biflubutamid It inhibits pigment biosynthesis of plants such as and shows herbicidal efficacy characterized by whitening.

[0033] (6) Dicloofop-methyl, flamprop-M-methyl, pyriphenop-sodium, fluazif op-butyl , Oxyloxyhop-methyl, quizalofo p-ethyl, cyhalofop-butvl, fenoxapr-petinole op-ethyl, metalifop-propyl and other aryloxyphenoxy propionic acid systems; alloxydim-sodium, clethodim, sethoxydim, tranoleco Specific to gramineous plants such as troxyxydim, butroxydim, tepraloxydim, caloxydim, clefoxydim, and cyclohexenedione such as profoxydim Strong herbicidal efficacy is recognized.

(7) Chlorimuron-ethyl, sulhomeromon-me thyl, primisulforon-methyl, bensulfo ron-methyl, chronoles Noreflon (chlorsulforon), Methos no lefon metinore (metsulforon-me thyl), Shinosno leflon (cinosulforon), pyrazosulforon-ethyl, azimsulforon, flazasulforon (flazasulforon), rimsulfuron (flazasulforon) ri msulfuron), nicosulofuron (nicosul! Uron), imazosulfuron (imazosulfuron), cyclosulfamuron (cyclosulfamuron), prosulforon (prosulforon), flupirsulfuron (flupyrsulluron), triflusulfuron-methyl (triflusulforon-methyl), Halosulforon-methyl, thifensulforon- methyl), ethoxysulforon, oxasulforon, ethametsulfuron, iodosnorephron uodosulfuron, snolefosnoreflon sulfosulfuron, triasulforon, tribenuron methyl (tribenuron methyl) , Tritosulforon, foramsulforon, tri floxysulluron, isosulforon-methyl, mesosulfuron-methyl, talent noresosno Sulfo-Rulea like orthosulfamuron, amidos ulluron; flumetsulam, metosula m, diclosulam, cloransulam-methyl, florasulam ( florasulam), Metosulfam ), Trioxolopyrimidinesulfonamides such as penoxsulam; imazapyr, imazethapyr, imazaquin, imazamox, imazameth, imazameth, imazameth ), Imidazolinones such as imazapic; pyrithiobac-sodium, bispyribac-s odium), pyriminobac-methyl, pyribenzoxim, pyriftalid, pyrimisulfane (pyrimisulfan, KUH-021) and other pyrimidyl-rusalicylic acid series; flucarbazone, procarbazone Sulfo-luminocarbo-triazolinones such as procarba zone-sodium; glyphosate, glyphosate-ammonium salt, glyphosate-isopropylamine, ¾ (glyphos ate-is opropylamine), Inhibiting plant amino acid biosynthesis, such as sulfosate, glufosinate, glufosinate-ammonium salt, and bilanafos It is said that it shows herbicidal efficacy.

 [0035] (8) Di-troaline systems such as trifluralin, oryzalin, oritalin, nitraline, pendimethalin, ethalfluralin, benfluralin, prodiamine Amides such as bensulide, napronamide, pronamide; amiprofos-methyl, butamifos, alofos, hyperophos, Organophosphorus such as piperophos; phelocarbamates such as propham, chlorpropham, and barban; daimuron, cumyluron, bromobutide Cumylamines such as asuram, dithiopyr, thiazopyr, cafenst role), indanofan, etc., which are said to show herbicidal efficacy by inhibiting cell mitosis in plants.

[0036] (9) arachlor, metazachlor, butachlor pretilachlor, metolachlor, S-metolachlor, S-metolachlor, tenenylchlor, Chloroacetamides, such as toxamide, pettoxamide, acetochlor, prono << chlorate (propachlor), propisoclonole (propisochlor); ) Carbamates such as: etobenzanid, mefenacet, flufenacet, tridiphane, fentrazamide, oxaziclomefone, Dimethenamide thenamid), ben fresate

 (benforesate), etc. that are said to show herbicidal efficacy by inhibiting plant protein biosynthesis or lipid biosynthesis.

 [0037] (10) EPTC, butylate, vernolate, pebulate, cycloate, prosulfocarb, esprocarb, thiobencarb, dialate Thiocarbamates such as diallate and triallate; MSMA, DSMA, endothal, etho! Umesate, sodium chlorate, befrugonic acid ), Fosamine, pinoxaden, HOK-201 and the like.

 [0038], 丄 丄) Xanthomonas campestris. Apicoccosurus nematosurus. Axseronilum monos eras. Drechsrela mmmsgms, etc., which are said to show herbicidal efficacy by parasitizing plants.

 [0039] The blending ratio of each component in the aqueous suspension herbicidal composition of the present invention cannot be specified unconditionally because it may be changed as appropriate according to the type of the blending component, the formulation form, the application scene, and the like. However, for example, Compound Al, Compound A 2 or a salt thereof as a herbicidal sulfonylurea compound is 0.1 to 60 parts by weight, preferably 0.5 to 50 parts by weight, and an inorganic salt is 0.1 to 25 parts by weight, preferably 1 to 20 parts by weight, more preferably 2 to 10 parts by weight, sulfonates are 0.01 to 30 parts by weight, preferably 0.1 to 20 parts by weight, and the remaining main component is water.

 [0040] 0.01 to 20 parts by weight, preferably 0.1 to 15 parts by weight when blended with other surfactants as desired, and 0.01 to 10 parts by weight, preferably 0.05 to 5 parts when blending an anti-settling agent. Part by weight, 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight when blending thickeners, 0.001 to 10 parts by weight, desirably 0.01 to 5 parts by weight when blending antifoaming agents 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight when preservatives are added, 1 to 70 parts by weight, preferably 1 to 50 parts by weight, etc. When the herbicidal compound is added, it is 0.1 to 60 parts by weight, preferably 0.1 to 50 parts by weight.

[0041] The aqueous suspension herbicidal composition of the present invention is applied to an undesired plant or a place where it grows, and is treated with, for example, a foliage treatment, a soil treatment, or a flooding treatment to produce annual weeds or perennials. A wide range of harmful plants such as weeds can be controlled or their growth can be suppressed.

 Examples of harmful plants include Inubie, Tainubie, Barefoot, Enokorogusa, Akinoenokorogosa, Ohashiba, Oats, Oats, Sowbill, Cypress, Velvet Millet, Paragrass, Azegaya, Itasegaya, Sparrows Mosquitoes, fireflies, staghorns, moths, crabs and weeds; Of Camiaceae; Ichibi, Maruba morning glory, white-tailed, American goldfish, Suberuhi, Aobu, Aguayte, Yebisuda, Inho Examples include zuki bean, sanaetade, chickweed, onamomi, tanekikebana, photokenosa, ragweed, yaemdara, hinoki hinagao, datura, ezonokine thisami, and enoki tasa. The scope of application can be varied from farmland such as upland, paddy fields, orchards, and mulberry fields; non-agricultural land such as forests, farm roads, playgrounds, factory sites, and turf. Herbicidal Compound Al, Compound A2 or a salt thereof as a sulfo-lurea compound can be applied at a rate of 1 to 500 g, preferably 2 to 250 g per lha.

Example

 The ability to describe examples of the present invention below The present invention is not limited to these. Example 1

 (1) Compound A1 (Purity 97.9%) 10.0 parts by weight

 (2) Sodium alkylnaphthalene sulfonate formalin condensate

 (Product name: Supragil MNS / 25, Rhodia Nikka) 4.0 parts by weight

 (3) Sodium dihydrogen phosphate 7.0 parts by weight

 (4) 79.0 parts by weight of water

Example 2 An aqueous suspension herbicidal composition was obtained by mixing the above ingredients and pulverizing with a wet pulverizer for 5 minutes.

 (1) Compound A1 (Purity 97.9%) 5.0 parts by weight

(2) Bensulfuron methyl (purity 99.3%) 5.0 parts by weight (3) Supragil MNS / 25 (Same as above) 4.0 parts by weight

 (4) Silicone antifoaming agent

 (Product name: Rhodorsil 432, manufactured by Rhodia Nikka Co., Ltd.) I

 (5) Sodium dihydrogen phosphate 7.0 parts by weight

 (6) 68.9 parts by weight of water

 (7) xanthan gum (1.5 parts by weight) and

 Example 3 Aqueous suspension herbicidal composition was prepared by mixing 10.0 parts by weight or more of water containing 1,2-benzisothiazolin-3-one (1.0 part by weight) and then wet-grinding it with a wet grinder for 5 minutes.

 (1) Compound A1 (Purity 97.9%) 5.0 parts by weight

 (2) Azimusulfuron (purity 99.0%) 10.0 parts by weight

 (3) Supragil MNS / 25 (Same as above) 4.0 parts by weight

 (4) Rhodorsil 432 (same as above) 0.1 parts by weight

 (5) Sodium dihydrogen phosphate 7.0 parts by weight

 (6) 63.9 parts by weight of water

 (7) xanthan gum (1.5 parts by weight) and

 Water containing 1,2-benzisothiazolin-3-one (1.0 part by weight) 10.0 parts by weight or more of the ingredients were mixed, and wet-pulverized for 5 minutes with a wet pulverizer to obtain an aqueous suspension herbicidal composition.

Example 4

 (1) Compound A1 (Purity 97.9%) 5.0 parts by weight

 (2) Azimusulfuron (purity 99.0%) 15.0 parts by weight

 (3) Supragil MNS / 25 (Same as above) 4.0 parts by weight

 (4) Rhodorsil 432 (same as above) 0.1 parts by weight

 (5) Sodium dihydrogen phosphate 7.0 parts by weight

 (6) 68.9 parts by weight of water

The above ingredients were mixed and pulverized with a wet pulverizer for 5 minutes to obtain an aqueous suspension herbicidal composition. [0046] Example 5

 (1) Compound A2 10.0 parts by weight

 (2) Supragil MNS / 25 (same as above) 4.0 parts by weight

 (3) Sodium dihydrogen phosphate 7.0 parts by weight

 (4) 79.0 parts by weight of water

 The above ingredients were mixed and wet pulverized with a wet pulverizer for 5 minutes to obtain an aqueous suspension herbicidal composition.

[0047] Comparative Example 1

 (1) Compound A1 (Purity 97.9%) 10.0 parts by weight

 (2) Supragil MNS / 25 (same as above) 4.0 parts by weight

 (3) 86.0 parts by weight of water

 The above ingredients were mixed and pulverized with a wet pulverizer for 5 minutes to obtain an aqueous suspension herbicidal composition.

[0048] Comparative Example 2

 (1) Compound A1 (Purity 97.9%) 5.0 parts by weight

 (2) Bensulfuron methyl (purity 99.3%) 5.0 parts by weight

 (3) Supragil MNS / 25 (Same as above) 4.0 parts by weight

 (4) Rhodorsil 432 (same as above) 0.1 parts by weight

 (5) 75.9 parts by weight of water

 (6) Xanthan gum (1.5 parts by weight) and

 Water containing 1,2-benzisothiazolin-3-one (1.0 part by weight) 10.0 parts by weight or more of the ingredients were mixed, and wet-pulverized for 5 minutes with a wet pulverizer to obtain an aqueous suspension herbicidal composition.

[0049] Comparative Example 3

 (1) Compound A1 (Purity 97.9%) 5.0 parts by weight

 (2) Azimusulfuron (purity 99.0%) 10.0 parts by weight

(3) Supragil MNS / 25 (Same as above) 4.0 parts by weight (4) Rhodorsil 432 (same as above) 0.1 parts by weight

 (5) 70.9 parts by weight of water

 (6) xanthan gum (1.5 parts by weight) and

 Water containing 1,2-benzisothiazolin-3-one (1.0 part by weight) 10.0 parts by weight The above ingredients were mixed and wet-ground for 5 minutes with a wet pulverizer to produce an aqueous suspension herbicidal composition as Comparative Example 4

 (1) Compound A1 (Purity 97.9%) 5.0 parts by weight

 (2) Azimusulfuron (purity 99.0%) 15.0 parts by weight

 (3) Supragil MNS / 25 (Same as above) 4.0 parts by weight

 (4) Rhodorsil 432 (same as above) 0.1 parts by weight

 (5) 75.9 parts by weight of water

 The above ingredients were mixed and pulverized with a wet pulverizer for 5 minutes to obtain an aqueous suspension herbicidal composition.

[0051] Comparative Example 5

 (1) Compound A2 10.0 parts by weight

 (2) Supragil MNS / 25 (Same as above) 4.0 parts by weight

 (3) 86.0 parts by weight of water

 The above ingredients were mixed and wet pulverized with a wet pulverizer for 5 minutes to obtain an aqueous suspension herbicidal composition.

 [0052] Stability test example 1

 The aqueous suspension herbicidal compositions of Example 1 and Comparative Example 1 were stored in a thermostat at 54 ° C. for 14 days. The content of Compound A1 in the aqueous suspension herbicidal composition before and after aging was quantified by liquid chromatography, and the degradation rate was calculated by the following formula to evaluate the change with time. The results are shown in Table 1.

 Decomposition rate (%) = [(Content immediately after production Content after storage) Z Content immediately after production] X 1 00

[0053] [Table 1] Table 1

[0054] When the sulfonates that are specific surfactants and inorganic salts in the present invention are used, the decomposition of the compound A1 is remarkably suppressed as compared with the case where the specific surfactant is used alone. This also shows the resultant force of the above stability test example.

 [0055] Stability test example 2

 Using the aqueous suspension herbicidal compositions of Examples 2 and 3 and Comparative Examples 2 and 3, the time course change was evaluated in the same manner as in the stability test example 1. The results are shown in Table 2. Bensulfuron methyl or azimusulfuron, which are other herbicidal compounds in Example 2 or 3, were stable.

[0056] [Table 2] Table 2

[0057] When the sulfonates and inorganic salts, which are specific surfactants in the present invention, are used, decomposition of the compound A1 is remarkably suppressed as compared with the case where the specific surfactant is used alone. This also shows the resultant force of the above stability test example.

 [0058] Stability Test Example 3

 Using the aqueous suspension herbic compositions of Examples 4 and 5 and Comparative Examples 4 and 5, the time course change was evaluated in the same manner as in the stability test example 1. As a result, the decomposition rate of Compound A1 was reduced in Example 4 compared to Comparative Example 4 and Example 5 was reduced in Compound A2 compared to Comparative Example 5.

 [0059] Biological test examples

1 / 1,000,000 ha pot is filled with upland soil, plant seeds are planted there, and grown in a greenhouse. When the plant power reaches the ¾ leaf stage, the aqueous suspension of the present invention A predetermined amount (100 g ai / ha) of a herbicidal composition is diluted with water equivalent to 300 L / ha, and a spreading agent (trade name: Surfatatanto WK, manufactured by Kao Corporation) is added here. , Handle the foliage. On the 21st day after treatment, investigate the growth of the plant. As a result, the aqueous suspension herbicidal composition of the present invention exhibits excellent herbicidal activity.

Industrial applicability

 The aqueous suspension herbicidal composition of the present invention is effectively used for crop protection in cultivated land and weed control in non-agricultural land. In addition, the Japanese Patent Application 2005- 231841 filed on August 10, 2005, the Japanese Patent Application 2005-326624 filed on November 10, 2005, and the February 21, 2006 application The entire contents of the specification, claims, and summary of Japanese Patent Application No. 2006-044472 are incorporated herein by reference as the disclosure of the specification of the present invention.

Claims

The scope of the claims

 [1] (1) 1— [3— [(4,6 Dimethoxypyrimidine 2-ylcarbamoyl) sulfamoyl] —

2 Pyridyl] —2 Fluoropropyl methoxyacetate, N — [(4, 6 Dimethoxypyrimidine—2-yl) aminocarbol] — 2— (2-Fluoro-1-hydroxypropyl)

3 Pyridinesulfonamides and their group strengths that also have salt power At least one selected herbicidal sulfonylurea compound, (2) inorganic salts, (3) arylaryl sulfonates, alkyl aryl sulfonates and their An aqueous suspension herbicidal composition containing at least one sulfonate salt selected from the group power that is also the power of formalin condensate and (4) water.

 [2] The herbicidal sulfo-lurea compound is 1 [3— [(4, 6 dimethoxypyrimidine 2-yl rubamoyl) sulfamoyl] —2-pyridyl] —2-fluoropropyl methoxyacetate. The aqueous suspension herbicidal composition as described.

[3] The aqueous suspension herbicidal composition according to claim 1, wherein the inorganic salt is a phosphate.

[4] The aqueous suspension herbicidal composition according to claim 3, which is at least one selected from the group power consisting of sodium dihydrogen phosphate and potassium dihydrogen phosphate.

[5] The aqueous suspension herbicidal composition according to claim 4, wherein the phosphate is sodium dihydrogen phosphate.

 [6] The sulfonate is at least one selected from the group consisting of alkylbenzene sulfonate, alkylnaphthalene sulfonate, alkylbenzene sulfonate formalin condensate and alkyl naphthalene sulfonate formalin condensate. The aqueous suspension herbicidal composition according to claim 1, wherein

[7] Sulfonate power Group power consisting of alkylbenzene sulfonate formalin condensate and alkylnaphthalene sulfonate formalin condensate is at least one selected

The aqueous suspension herbicidal composition according to claim 6.

8. The aqueous suspension herbicidal composition according to claim 1, further comprising another herbicidal compound.

[9] Controlling or inhibiting the growth of an undesirable plant comprising applying the herbicidally effective amount of the aqueous suspension herbicidal composition according to claim 1 to a desirable plant or a place where it grows Method.

[10] Inorganic salts, arylene sulfonates, alkylaryl sulfonates and their forols Marine condensate power Group power 1 [3— [(4,6 Dimethoxypyrimidine 2-ylcarbamoyl) sulfamoyl]-2 in aqueous suspension herbicidal composition with at least one selected sulfonate Pyridyl]-2-fluoropropyl methoxyacetate, N— [(4, 6 Dimethoxypyrimidine 1-yl) aminocarbol] — 2— (2 Fluoro 1-hydroxypropyl) — 3-Pyridinesulfonamide And a method for stabilizing at least one selected herbicidal sulfonylurea compound.