Herbicidal composition and use thereof

Abstract

The present invention belongs to the field of pesticides, and specifically relates to a herbicidal composition and the use thereof. The composition comprises a herbicidally effective amount of an active ingredient A and an active ingredient B, wherein the active ingredient A is; and the active ingredient B is selected from one or more of the following compounds or acids / esters / salts thereof: diflufenican, picolinafen, fluridone, fenpyrazone, saflufenacil, flumioxazin, sulfentrazone or. The composition can effectively control problems of gramineous weeds, cyperaceous weeds, broadleaf weeds, etc., and exhibits characteristics of an expanded herbicidal spectrum, a reduced application dosage, the ability to produce a synergistic effect, effectiveness in controlling resistant weeds, etc.

Description

Herbicidal composition and use thereof TECHNICAL FIELD

[0001] The present application belongs to the field of pesticides, and particularly relates to a herbicidal composition and use thereof. BACKGROUND

[0002] Chemical weeding is the most economical and effective means in the prevention and control of weeds in farmland, but long-term continuous high-dose use of single variety or single action mode of chemical herbicides is prone to cause problems such as weed tolerance and resistance evolution.

[0003] Reasonable compounding or mixing of herbicide compounds has the advantages of expanding the weed spectrum, improving the prevention and control effect, delaying the occurrence and development of weed tolerance and resistance, etc., and is one of the most effective methods to solve the above problems, and it is still necessary to develop herbicidal composition varieties with high safety, wide weed spectrum, synergistic effect and resistance to resistant weeds in production. SUMMARY

[0004] To solve the above problems in the prior art, the present application provides a herbicidal composition and use thereof. The composition can effectively prevent and control weeds such as gramineae, cyperaceae and broadleaf weeds, has the characteristics of expanding the weed spectrum, reducing the application amount, producing synergistic effect and solving resistant weeds, etc.

[0005] A herbicidal composition and use thereof, comprising a herbicidally effective amount of active ingredient A and active ingredient B, wherein,

[0006] The active ingredient A is

[0007] The active ingredient B is selected from one or more of the following compounds or their acids / esters / salts: diflufenican (CAS: 83164-33-4), picolinafen (CAS: 137641-05-5), fluridone (CAS: 59756-60-4), benzofluor (CAS: 1992017-55-6), metazachlor (CAS: 372137-35-4), flumioxazine (CAS: 103361-09-7), sulfentrazone (CAS: 122836-35-5) or

[0008] In one specific embodiment, the weight ratio of A to B in the herbicidal composition is 1:100-100:1, 1:60-60:1, 1:30-30:1, 1:20-20:1, 1:16-10:1, 1:10-8:1, 1:6-4:1, 1:4-3:1 or 1:2-1:1.

[0009] In one embodiment, the mass percentage of A and B in the herbicidal composition is 1-95%, preferably 1-80% of the total.

[0010] In one embodiment, the herbicidal composition further comprises conventional adjuvants, including carriers and / or surfactants.

[0011] The term "carrier" herein denotes an organic or inorganic, natural or synthetic substance. They facilitate the application of the active ingredients, the carrier is generally inert and must be agriculturally acceptable, in particular by the treated plants. The carrier can be solid, such as clay, natural or synthetic silicates, silica, resins, waxes, solid fertilizers, etc., or liquid, such as water, alcohols, ketones, petroleum fractions, aromatic or waxy hydrocarbons, chlorinated hydrocarbons, liquefied gases, etc.

[0012] The surfactant can include emulsifiers, dispersants or wetting agents, which can be ionic or non-ionic. Examples that can be mentioned are salts of polyacrylic acid, lignosulfonates, salts of phenol sulfonic acid or naphthalene sulfonic acid, polymers of ethylene oxide with aliphatic alcohols or with aliphatic acids or with aliphatic amines and substituted phenols, in particular alkylphenols or arylphenols, sulfosuccinates, taurine derivatives, in particular taurine alkyl esters, and phosphoric esters of alcohols or of polyhydroxyethylated phenols, alkylsulfonates, alkylarylsulfonates, alkylsulfates, lauryl ether sulfates, fatty alcohol sulfates, and sulfated hexa-, hepta- and octadecanols and sulfated fatty alcohol glycol ethers, in addition to condensates of naphthalene or naphthalene sulfonic acid with phenol and formaldehyde, polyoxyethylene octylphenyl ethers, ethoxylated isooctylphenol, octylphenol or nonylphenol, alkylphenyl polyglycol ethers, tributylphenyl polyglycol ethers, tristriylphenyl polyglycol ethers, alkylaryl polyether alcohols, alcohol and fatty alcohol / ethylene oxide condensates, ethoxylated castor oil, polyoxyethylene alkyl ethers, ethoxylated polyoxypropylene, lauryl alcohol polyglycol ether acetal, sorbitol esters, lignosulfite waste liquors, and proteins, denatured proteins, polysaccharides (e.g. methylcellulose), hydrophobically modified starches, polyvinyl alcohol, polycarboxylates, polyalkoxylates, polyvinylamines, polyvinylpyrrolidone and copolymers thereof. At least one surfactant is required to facilitate the dispersion of the active ingredients in water and to enable their correct application to the plants.

[0013] The above-mentioned compositions can also contain various other components, such as protective colloids, binders, thickeners, thixotropic agents, penetrants, stabilizers, sequestering agents, dyes, colorings and polymers.

[0014] In addition, the compositions of the present invention can be mixed with the following active substances, such as those in *World Encyclopedia of New Pesticide Varieties*, China Agricultural Science and Technology Press, September 2010, and known substances cited herein. Examples of herbicidal active substances mentioned below (Note: the name of the compound, either according to the common name of the International Organization for Standardization (ISO) or the chemical name, with a code where appropriate): acetochlor, butachlor, metolachlor, isopropachlor, isopropachlor, S-metolachlor, propachlor, chlorpyrifos, chlorpyrifos, chlorpyrifos, naphthalenepropionylchlor, R-L-naphthalenepropionylchlor, propargite, benzylthiamethoxam, bisbenzylchlor, pyrifluquinazon, chlorpyrifos, flubutyroxychlor, brobutyroxychlor, dimethoate, high-efficiency dimethoate, ethoxybenzylchlor, flumethiamethoxam, methoxythiamethoxam, pyrifluquinazon, isoxachlor, high-efficiency methyl parathion, high-efficiency methyl parathion, dipropionylchlor, clethodim, butyroxychlor Cyclopropamide, flusulfanilamide, heptamethrin, isobutanilamide, propyzamide, terbutanilamide, methylparaben, metolachlor, styraclostrobin, chlorpyrifos, acetochlor, valproic acid, pendimethalin, carbaryl, styraclostrobin, tricyclomethoate, butenazolamide, styraclostrobin, bensulfuron-methyl, naphthylpropamide, acetochlor, naphthylparaben, thiamethoxam, pyrimethanil, bensulfuron-methyl, chlorpyrifos, chlorpyrifos, butachlor, flupyrazole, atrazine, simazine, cypermethrin, cypermethrin, cypermethrin, pyrazosulfuron, chlorpyrifos ... Atrazine, cyprofen, cyprofen, cyprofen, cyprofen, methoxypropazine, cypermethrin, cyprofen, cyprofen, cyprofen, cyprofen, cyprofen, cyprofen, cyprofen, cyprofen, cyanuric acid, Indaziflam, chlorsulfuron, mesosulfuron, bensulfuron, chlorpyrifos, bensulfuron, thiasulfuron, pyrimisulfuron, mesosulfuron, sodium iodosulfuron, formamidosulfuron, ethersulfuron, etherbensulfuron, methylsulfuron, nicosulfuron, aminebensulfuron, acylsulfuron, ethoxysulfuron, cyprofensulfuron, sulfadiazine, sulfadiazine, tetrazoliumsulfuron, pyrimisulfuron, monosulfuron, monosulfuron, fluazolidone, flupyrimisulfuron, flupyrimisulfuron, cyclopyrimisulfuron, pyrimisulfuron, flupyrimisulfuron, flupyrimisulfuron, pyrimisulfuron, flupyrimisulfuron, pyrimisulfuron, flupyrimisulfuron, pyrimisulfuron, flupyrimisulfuron, pyrimisulfuron, pyrimisulfuron, trifluoromethyl Sulfuron, sulfonylsulfuron, trifluralin, flusulfanilamide, trifluralin, sodium sulfonylsulfuron, flupyrsulfuron, methoxysulfuron, pyrimethanil, propyrisulfuron, pyrimethanil, trifluralin, flusulfanilamide, quizalofop-p-ethyl, ethoxysulfuron, glyphosate, bensulfuron, chlorfluazuron, methylfluazuron, trifluralin, methoxysulfuron, trifluralin, flufenoxuron, flufenoxuron, chlorfluazuron, metolachlor, methylfluazuron, flufenoxuron, chlorfluazuron, methylfluazuron, methylfluazuron, halosafen, chlorfluazuron, isoproturon, linuron, diuron, sapura, fluroxypyr, bensulfuron, methylbensulfuron, bensulfuron, sulfothiamethoxamIsoxuron, terbutaline, clodinafop-methyl, chlorothalonil, methyl methazine, cyprodinil, methoxyfenozide, bromonazine, methoxyfenozide, chlorpyrifos, metribuzin, cyclorhizobium, fenitrothion, flusulfuron, glufosinate, fenprozil, isosulfuron, cyclorhizobium, thiamethoxam, thiamethoxam, fenprozil, thiamethoxam, thiamethoxam, thiamethoxam, thiamethoxam, oxazolium, Monisouron, Anisuron, Methiuron, Chloreturon, tetraflufenozide, betaine, betaine-ethyl, betaine, sulfadiazine, terbutaline, albendazole, fenprozil, chlorpyrifos, dichlorvos, metribuzin, chlorpyrifos, Carboxazole, Chlorprocarb, Fenasulam BCPC, CPPC, Carbasulam, Butadiene, Clethodim, Metrazine, Clethodim, Wild Grass, Permethrin, Clethodim, Barnyardgrass, Cypermethrin, Oat Grass, Dimethoate, Ethylmethoxam, Clethodim, Clethodim, Betaine, Cetylmethoxam, Thionylmethoxam, Methiobencarb, 2,4-D Isooctyl Butylester, 2,4-D Sodium Isooctyl Butylester, 2,4-D Isooctyl Butylester, 2,4-D Chloromethoxylate, 2,4-D Isooctyl Butylester ... Acetic acid, 2,4,5-t-propionic acid, 2,4,5-t-butyric acid, methyl 4-chloroamine salt, dicamba, sedge, valerate, cyhalofop-p-ethyl, trichlorobenzoic acid, aminodichlorobenzoic acid, methoxytrichlorobenzoic acid, quizalofop-p-ethyl, pyrfluthrin, quizalofop-p-ethyl, flupyrfluthrin, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, oxazol, cyhalofop-p-ethyl, oxazolyl acetochlor, clodinafop, thiamethoxam, quizalofop-p-ethyl, haloxyfop-p-ethyl, trifluralin, isoxaflutole, paraquat, diquat, azoxystrobin, ethylbutyral, isopropaloxone, mesosulfuron-methyl, cyprofen, aminopropionol, ethylbutyral, chlorfluazol, diflubenzuron, chlorfluazol, mesopropalin, propionyl Nitrophenol, glyphosate, barnyardphos, glufosinate, methyl parathion, glyphosate, piperazine, diammonium phosphate, dimethoate, phosmet, fenpropathrin, fenpropathrin, fenpropathrin, dimethoate, fenpropathrin, imidacloprid, imidacloprid acetic acid, imidacloprid quinolinic acid, methoxymethylene, methoxymethylene ammonium salt, imidacloprid acetic acid, imidacloprid, clopyralid, clopyralid isooctyl ester, dichloropyridine acid, aminopyridine acid, trichloropyridine acid, fluthion, haloxypyridine, trichloropyridine phenol, thiamethoxam, flupyridine, clopyralid, flupyridine hydrazone, trichloropyridine butoxyethyl ester, cliodinate, clethodim, thiamethoxam, quizalofop-p-ethyl, cyclobenzanone, butenazol, oxadiazon, pyranazol, buthidazole, cyproconazole, cyclobenzanoneAmibuzin, acetamipridone, Ametridione, Amibuzin, bromobenzonitrile, octanoyl bromobenzonitrile, octanoyl iodobenzonitrile, iodobenzonitrile, diphenylacetonitrile, bispyribac-sodium, hydroxybispyribac-sodium, Iodobonil, pyrimethanil, diflubenzuron, penoxsulam, sulfadiazine, chlorpyrifos-sulfuron-methyl, dichlorvos-sulfuron-methyl, flumethrin, bispyribac-sodium, pyrimethanil, pyrimethanil, pyrimethanil, pyrimethanil, pyrimethanil, bispyribac-sulfuron-methyl, nicosulfuron-methyl, sulfadiazine, Tembotrione, Tefuryltrione, Bicyclopyrone, Ketodpiradox, isoxazin, isoxazin, Fenoxasulfone, Methi Ozolin, isopropalazine, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, bensulfuron, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, flumetsulam, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, flumethrin, mesotrione, pyrazosulfuron, flupropacil, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, flupropacil, pyrazosulfuron, flupropacil, pyrazosulfuron, flumetsulam, pentachlorophenol (sodium), terliphenol, terliphenol, terliphenol, pentonitrophenol, dinitrophenol, chlorpyrifos, terlisulfuron, terlisulfuron, terlisulfuron, terlisulfuron, terlisulfuron, terlisulfuron, terlisulfuron, terlisulfuron, terlisulfuron Herbicides such as chlorpyrifos, methyl methazine, tetrazolium chlorpyrifos, flupyridamole, chlorpyrifos, bromochlor, dimethoate, pyrazosulfuron, cyprodinil, pyrazosulfuron, pyrazosulfuron, cyprodinil, bentazon, pyrazosulfuron, oxadiazon, cyprodinil, isoxadiazon, cyclohexane, isopropyl methazine, propargite, indicarboxylate, sodium chlorate, cypermethrin, trichlorfon, etc. Chloroacetic acid, monochloroacetic acid, hexachloroacetone, tetrafluoropropionic acid, forage fastener, bromophenol oxime, triazole sulfonate, methomyl, furazolidone, furazolidone, ethoxysulfuron, pyrimethanil, chlorphthalic acid, flurfluthrin, barnyardgrass, acrolein, bensulfuron-methyl, metribuzin, oat ester, thiamethoxam, styracil, hydroxyzine, methoxybenzone, pyrimethanil, chlorpyrifos, trichloropropionic acid, Alorac, D Iethamquat, Etnipromid, Iprymidam, Ipfencarbazone, Thiencarbazone-methyl, Pyrimisulfan, Chlorflurazole, Tripropindan, Sulglycapin, methylsulfuron, Cambendichlor, Cyproterinic acid, Thiamethoxam, cypermethrin, cypermethrin, cypermethrin, cypermethrin, cypermethrin, cypermethrin, cypermethrin, pyrazole cypermethrin, furazolidone, oxadiazon, bis(oxazolyl)acrylic acid, dichloropropeneamine, fluorochloropyridinium ester, DOW fluorochloropyridinium ester, UBH-509, D489, LS 82-556KPP-300, NC-324, NC-330, KH-218, DPX-N8189, SC-0744, DOWCO535, DK-8910, V-53482, PP-600, MBH-001, KIH-9201, ET-751, KIH-6127 and KIH-2023.

[0015] The herbicidal composition further comprises at least one safener selected from the group consisting of:

[0016] a) the class of the dichlorophenylpyrazoline-3-carboxylic acid (S1) compounds, preferred compounds are, for example, 1-(2,4-dichlorophenyl)-5-(ethoxycarbonyl)-5-methyl-2-pyrazoline-3- carboxylic acid ethyl ester (S1-1, mefenpyr-diethyl, PM, pages 594-595), and related compounds as described in, for example, WO 91 / 07874 and PM (pages 594-595).

[0017] b) the class of the dichlorophenylpyrazole carboxylic acid derivatives, preferred compounds are, for example, 1-(2,4-dichlorophenyl)-5-methylpyrazole-3-carboxylic acid ethyl ester (S1-2), 1-(2,4-dichlorophenyl)-5-isopropylpyrazole-3-carboxylic acid ethyl ester (S1-3), 1-(2,4-dichlorophenyl)-5-(1,1-dimethyl-ethyl)pyrazole-3-carboxylic acid ethyl ester (S1-4), 1-(2,4-dichlorophenyl)-5-phenylpyrazole-3-carboxylic acid ethyl ester (S1-5), and related compounds as described in EP-A-333131 and EP-A-269806.

[0018] c) the class of the triazole carboxylic acid (S1) compounds, preferred compounds are, for example, fenchlorazole, i.e. 1-(2,4-dichlorophenyl)-5-trichloromethyl-(1 H)-1,2,4-triazole-3-carboxylic acid ethyl ester (S1-6) and related compounds (see EP-A-174562 and EP-A-346620).

[0019] d) 5-benzyl- or 5-phenyl-2-isoxazoline-3-carboxylic acid or 5,5-diphenyl-2- isoxazoline-3-carboxylic acid compounds, preferred compounds are, for example, 5-(2,4- dichlorobenzyl)-2-isoxazoline-3-carboxylic acid ethyl ester (S1-7) or 5-phenyl-2- isoxazoline-3-carboxylic acid ethyl ester (S1-8) and related compounds described in WO 91 / 08202, or 5,5-diphenyl-2-isoxazoline-3-carboxylic acid ethyl ester (S1-9, isoxadifen- ethyl) or 5,5-diphenyl-2-isoxazoline-3-carboxylic acid n-propyl ester (S1-10) or 5-(4- fluorophenyl)-5-phenyl-2-isoxazoline-3-carboxylic acid ethyl ester (S1-11) described in patent application WO-A-95 / 07897.

[0020] e) 8-quinolinyloxyacetic acid (S2) compounds, preferably 1-methylhex-1-yl (5-chloro-8- quinolinyloxy) acetate (S2-1, cloquintocet-mexyl, as in PM (pages 195-196), (1,3- dimethylbut-1-yl)(5-chloro-8-quinolinyloxy) acetate (S2-2), 4-allyloxybutyl (5-chloro-8- quinolinyloxy) acetate (S2-3), 1-allyloxypropan-2-yl (5-chloro-8-quinolinyloxy) acetate (S2-4), (5-chloro-8-quinolinyloxy) ethyl acetate (S2-5), (5-chloro-8-quinolinyloxy) methyl acetate (S2-6), (5-chloro-8-quinolinyloxy) allyl acetate (S2-7), 2-(2- propyleneiminooxy)-1-ethyl (5-chloro-8-quinolinyloxy) acetate (S2-8), 2-oxopropan-1-yl (5-chloro-8-quinolinyloxy) acetate (S2-9), and related compounds described in EP-A-86750, EP-A-94349 and EP-A-191736 or EP-A-0492366.

[0021] f) (5-chloro-8-quinolinyloxy) malonic acid compounds, preferred compounds are, for example, (5-chloro-8-quinolinyloxy) malonic acid diethyl ester, (5-chloro-8-quinolinyloxy) malonic acid diallyl ester, (5-chloro-8-quinolinyloxy) malonic acid methyl ethyl ester and related compounds described in EP-A-0582198.

[0022] g) phenoxyacetic acid, phenoxypropionic acid or aromatic carboxylic acid active compounds, for example 2,4-dichlorophenoxyacetic acid (and esters) (2,4-D), 4-chloro-2- methylphenoxypropionic acid ester (mecoprop), MCPA or 3,6-dichloro-2-methoxybenzoic acid (and esters) (dicamba).

[0023] h) pyrimidines, such as "f enclorim" (PM, pages 386-387) (= 4,6-dichloro-2-phenylpyrimidine),

[0024] i) dichloroacetamides, which are often used as pre-planting safeners (safeners for the soil), such as "dichloromid" (PM, pages 270-271) (= N,N-diallyl-2,2-dichloroacetamide), "AR-29148" (= 3-dichloroacetyl-2,2,5-trimethyl-1,3-oxazolidinone, available from Stauffer), "benoxacor" (PM, pages 74-75) (= 4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazin), "APPG-1292" (= N-allyl-N-[(1,3-dioxolan-2-yl)-methyl]dichloroacetamide, available from PPG Industries), "ADK-24" (= N-allyl-N-[(allylaminocarbonyl)-methyl]-dichloroacetamide, available from Sagro-Chem), "AAD-67" or "AMON 4660" (= 3-dichloroacetyl-1 -oxa-3-aza- spiro[4,5]decane, available from Nitrokemia or Monsanto), "diclonon" or "ABAS 145138" or "ALAB 145138" (= (= 3-dichloroacetyl-2,5,5-trimethyl-1,3-diazabicyclo[4.3.0]nonane, available from BASF), and "furilazol" or "AMON 13900" (see PM, pages 482-483) (= (RS)-3-dichloroacetyl-5-(2-furanyl)-2,2-dimethyloxazolidinone),

[0025] j) dichloroacetone derivatives, such as "AMG 191 " (CAS Reg. No. 96420-72-3) (= 2-dichloromethyl-2-methyl-1,3-dioxolane, available from Nitrokemia),

[0026] k) the class of active compounds of the oxylimino compounds, which are known as seed dressing materials, for example "oxabetrinil" (PM, page 689) (= (Z)-1,3-dioxolan-2-ylmethyloximino(phenyl)acetonitrile), which is known as a safener in seed dressing to prevent damage by metolachlor, "fluxofenim" (PM, pages 467-468) (= 1 -(4-chlorophenyl)-2,2,2-trifluoro-1 - ethanone O-(1,3-dioxolan-2-ylmethyl)-oxime, which is known as a safener in seed dressing to prevent damage by metolachlor, and "cyometrinil" or "A-CGA-43089" (PM, page 983) (= (Z)-cyanomethyloximino(phenyl)acetonitrile), which is known as a safener in seed dressing to prevent damage by metolachlor,

[0027] l) the class of active compounds of the thiazole carboxylates, which are known as seed dressing materials, for example "flurazol" (PM, pages 450-451 ) (= 2-chloro-4-trifluoromethyl-1,3-thiazole-5-carboxylic acid benzyl ester), which is known as a safener in seed dressing to prevent damage by alachlor and metolachlor,

[0028] m) the class of active compounds of the naphthalene dicarboxylic acid derivatives, which are known as seed dressing agents, for example "naphthalic anhydride" (PM, pages 1009-1010) (= 1,8-naphthalic anhydride), which is known as a safener in seed dressing of corn to prevent damage by thiocarbamate herbicides,

[0029] n) the class of active compounds of the chromane acetic acid derivatives, for example "ACL 304415" (CAS Registry Number 31541-57-8) (= 2-84-carboxychroman-4-yl)acetic acid, available from American Cyanamid),

[0030] o) Active compounds that, in addition to their herbicidal effect on harmful plants, also act as plant safety agents, such as "dimepiperate" or "AMY-93" (PM, pp. 302-303) (=S-1-methyl-1-phenylethylpiperidine-1-thiocarboxylate), "daimuron" or "ASK23" (PM, p. 247) (=1-(1-methyl-1-phenylethyl)-3-p-tolylurea), "benzuron" (c “umyluron” = “AJC-940” (=3-(2-chlorophenylmethyl)-1-(1-methyl-1-phenyl-ethyl)urea, see JP-A-60087254), “methoxyphenon” or “ANK049” (=3,3'-dimethyl-4-methoxy-benzophenone), “CSB” (=1-bromo-4-(chloromethylsulfonyl)benzene) (CAS Registry No. 54091-06-4, purchased from Kumiai).

[0031] The safener is preferably one or more of the following: bis(benzyloxazol) (CAS: 163520-33-0), cyprosulfamide (CAS: 221667-31-8), pyrazole-methyl (CAS: 135590-91-9), quinoline (CAS: 99607-70-2), gibberellic acid (CAS: 7-06-5), furilazole (CAS: 121776-33-8), and metcamifen (CAS: 129531-12-0).

[0032] In the context of this specification, if the abbreviation of the common name of the active compound is used, it includes, in each case, all conventional derivatives, such as esters and salts, and isomers, particularly optical isomers, especially one or more commercially available forms. If the common name indicates an ester or salt, it also includes, in each case, all other conventional derivatives, such as other esters and salts, free acids and neutral compounds, and isomers, particularly optical isomers, especially one or more commercially available forms. The chemical name of the compound given indicates at least one compound covered by the common name, which is generally preferred. In the case of sulfonamides such as sulfonylureas, the salt also includes salts formed by the exchange of hydrogen atoms in the sulfonamide group with a cation. For example, 2,4-chloro derivatives include, but are not limited to: sodium salt, potassium salt, dimethylammonium salt, isopropylamine salt, etc., as well as methyl 2,4-chloro, ethyl 2,4-chloro, isooctyl 2,4-chloro, ethyl 2,4-chloro, etc.; 2,4-D derivatives include, but are not limited to: 2,4-D salts such as sodium salt, potassium salt, dimethylammonium salt, triethanolamine salt, isopropylamine salt, choline, etc., as well as 2,4-D esters such as methyl 2,4-chloro, ethyl 2,4-chloro, butyl 2,4-chloro, isooctyl 2,4-chloro, etc.

[0033] In the context of the present application, salts of the compounds are preferably the respective alkali metal salts (such as lithium, sodium and potassium salts), alkaline earth metal salts (such as calcium and magnesium salts), transition metal salts (such as manganese, copper, zinc and iron salts), ammonium salts or substituted ammonium salts in which 1 to 4 hydrogen atoms are replaced by C1-C4-alkyl, hydroxy-C1-C4-alkyl, C1-C4-alkoxy-C1-C4-alkyl, hydroxy-C1-C4-alkoxy-C1-C4-alkyl, phenyl or benzyl, preferably ammonium, methylammonium, isopropylammonium, dimethylammonium, diisopropylammonium, trimethylammonium, heptylammonium, dodecylammonium, tetradecylammonium, tetramethylammonium, tetraethylammonium, tetrabutylammonium, 2-hydroxyethylammonium (olamine salt), 2-(2-hydroxyeth-1-oxy)eth-1-ylammonium (diglycolamine salt), di(2-hydroxyeth-1-yl)ammonium (dialcoholamine salt), tri(2-hydroxyethyl)ammonium (trialcoholamine salt), tri(2-hydroxypropyl)ammonium, benzyltrimethylammonium, benzyltriethylammonium, N,N,N-trimethylethanolammonium (choline salt), furthermore phosphonium ions, sulfonium ions, preferably tri(C1-C4-alkyl)sulfonium such as trimethylsulfonium, and sulfoxonium ions, preferably tri(C1-C4-alkyl)sulfoxonium, and finally salts of polyamines such as N,N-di(3-aminopropyl)methylamine and diethylenetriamine.

[0034] In the context of the present application, esters of the compounds, for example as alkyl esters, alkenyl esters, alkynyl esters, alkoxyalkyl esters, tetrahydrofurfuryl methyl esters and the corresponding thio esters, are preferably C1-C 10 alkyl esters, C2-C 10 alkenyl esters, C2-C 10 alkynyl esters, C1-C 10 alkoxy C1-C 10 alkyl esters, (tetrahydrofuran-2-yl)methyl esters and the corresponding thio esters. Preferred C1-C 10 alkyl esters or C1-C 10 alkylthio esters are, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, methylhexyl (1-methylhexyl), methylheptyl (1-methylheptyl), heptyl, octyl or isooctyl (2-ethylhexyl) esters. Preferred C1-C 10 alkoxy-C1-C 10 alkyl esters are C1-C4-alkoxyethyl esters, for example 2-methoxyethyl, 2-ethoxyethyl, 2-butoxyethyl (butoxyethyl), 2-butoxypropyl or 3-butoxypropyl esters.

[0035] The compositions according to the application can be used directly or diluted by the user before use. They are prepared by customary processing methods, i.e. by mixing the active substances with liquid solvents or solid carriers and, if desired, one or more surfactants, such as dispersants, stabilizers, wetters, binders, antifoams and the like.

[0036] The specific formulations of the herbicidal composition are dispersible oil suspension, aqueous suspension, suspoemulsion, wettable powder, emulsifiable concentrate, water dispersible granule (dry flowable), water emulsion, microemulsion.

[0037] In short, the composition of the present application can be mixed with solid and liquid additives conventionally used in the prior art formulations. The amount of active ingredient used varies with the external conditions, such as temperature, humidity, the nature of the herbicide used, etc. It can vary greatly, for example, between 0.001 and 2.0 kg / ha, or more of active substance, but preferably between 0.003 and 1.0 kg / ha, in particular between 5 and 500 g / ha.

[0038] The present application also provides the use of the herbicidal composition in controlling weeds; and a method for controlling the growth of unwanted plants, which comprises applying the herbicidal composition to the plants, plant parts, plant seeds or areas where the plants grow.

[0039] In addition, the composition of the present application can be applied to the leaves of the plants to be treated, i.e. to the weeds, by spraying, particularly to the surface affected by the weeds or susceptible to the weeds.

[0040] When the herbicidal composition of the present application is applied, an unexpected synergistic effect is obtained, and the herbicidal activity is more remarkable than the expected sum of the activities of the individual herbicides, and the activities of the individual herbicides. The synergistic effect is manifested in reduced application rates, a wider spectrum of weed control, faster and more persistent herbicidal action, which are required in weed control practice. In terms of the properties described, the new compositions are clearly superior to existing herbicides, achieving reduced use and being more environmentally friendly.

[0041] The synergistic herbicidal composition of the present application also has the following advantages:

[0042] (1) The composition of the present application is environmentally friendly and easily degradable in the environment.

[0043] (2) The herbicidal composition of the present application is low in cost and easy to use, and its popularization and application have great economic and social benefits.

[0044] All patents, patent applications, and publications mentioned herein are hereby incorporated by reference in their entireties for all purposes. DETAILED DESCRIPTION

[0045] The following examples are not intended to limit the present application, but only to illustrate how the present application is implemented. These examples show particularly remarkable effectiveness for some weeds. For example:

[0046] Pharmacodynamic test (soil closed treatment):

[0047] 1) Culture conditions

[0048] The test was carried out in a controlled sunlight greenhouse, with temperature 20-30°C, natural light, and relative humidity 55%-75%.

[0049] The soil type was loam, with organic matter content 1.63%, pH=7.1, alkali-hydrolyzable nitrogen 84.3 mg / kg, available phosphorus 38.5 mg / kg, and available potassium 82.1 mg / kg. The test soil was quantitatively filled to 3 / 4 of the pot, and then irrigated from the bottom to make the soil completely wet and saturated. The seeds of the test weeds were germinated, and then uniformly and quantitatively sowed on the surface. According to the size of the seeds, the soil was covered by 0.5-1 cm, and the sowing was ready for use after 72 hours.

[0050] 2) Test design

[0051] 2.1) Reagents

[0052] 2.1.1) Test reagents

[0053] The required active ingredients were purchased from reagent companies or synthesized according to conventional methods. The technical agents were diluted with acetone as solvent, and 0.1% emulsifier Tween-80 aqueous solution was used for dilution, and the dilution was used immediately.

[0054] 2.2) Test treatment

[0055] 2.2.1) Dose setting

[0056] When determining the allocation ratio or content of each component of active ingredient A and active ingredient B, the action characteristics and toxicity of the two agents should be considered, and the main purpose of the formulation should also be considered. Based on the previous pre-test, the amounts of A and B active ingredients used alone and in combination are shown in the table. Water containing no agent, the same solvent and emulsifier was used as a blank control.

[0057] 2.2.2) Test repetition

[0058] Each treatment was repeated 4 times, and 3 pots were used for each treatment, with 30 seeds of weeds sown in each pot.

[0059] 3) Test method

[0060] Before treatment, irrigation was carried out to maintain a water layer of 1-2 cm. A pipette was used to take a certain amount of liquid, and irrigation treatment was carried out from low dose to high dose according to the test design, with 4 repeated treatments each time. After treatment, the pots were moved to the greenhouse for normal culture, and a water layer of 1-2 cm was maintained during the test period.

[0061] 4) Data investigation and statistical analysis

[0062] 4.1) Investigation method

[0063] The absolute number method was used. Surviving weed seedlings were cut along the soil surface with a blade, and their fresh weight was measured using an analytical balance. Dead weeds were counted as having a fresh weight of zero.

[0064] 4.2) Survey time and frequency

[0065] An investigation was conducted 14 days after the incident, for a total of one investigation.

[0066] 4.3) Data Statistical Analysis

[0067] The theoretical fresh weight inhibition rate (E0 = X + Y) of each treatment combination was calculated using the Gowing method. This was then compared with the measured inhibition rate (E) to evaluate the combined effect of the two treatments on weeds. An E-E0 value greater than 10% indicates a synergistic effect, less than -10% indicates an antagonistic effect, and between -10% and 10% indicates an additive effect. The optimal ratio was determined based on actual efficacy, herbicide characteristics, and formulation balance. In the formula, X represents the fresh weight inhibition rate when active ingredient A is at dosage P; Y represents the fresh weight inhibition rate when active ingredient B is at dosage Q.

[0068] The statistical results are shown in Table 1-8 below.

[0069] Table 1A Evaluation of the actual control efficacy and combined effects of the combination of pyrifluquinazon and pyrifluquinazon against Lorrae rubrum.

[0070] Table 2A Evaluation of the actual control efficacy and combined effects of flupyridine against ryegrass.

[0071] Table 3A Evaluation of the actual control efficacy and combined effects of flupyridine against ryegrass.

[0072] Table 4A Evaluation of the actual control efficacy and combined effects of the mixed benzoxazole-fluoxetine against bromegranate

[0073] Table 5A Evaluation of the actual control efficacy and combined effects of the mixed sulfadiazine and bensulfuron-methyl against bromegrass.

[0074] Table 6A Evaluation of the actual control efficacy and combined effects of the combination of propyzinamide and flumetsulam against brome.

[0075] Table 7A Evaluation of the actual control efficacy and combined effects of the combination of mesotrione and chlorpyrifos against brome.

[0076] Table 8A Mixtures Evaluation of actual control efficacy and combined effects against ryegrass

[0077] Through a large number of experiments and explorations, the application surprisingly finds that the composition has a surprising and unexpected synergistic effect for preventing and removing mainly gramineae, cyperaceae, broadleaf weeds and the like, and the synergistic effect is more significant at a low dosage, the application amount can be reduced, the pollution to the environment is reduced, the reasonable compounding reduces the agricultural cost, and the composition has a good application prospect.

Claims

1. A herbicidal composition, characterized by comprising: comprising a herbicidally effective amount of active ingredient A and active ingredient B, wherein Active ingredient A is Active Ingredient B is selected from one or more of the following compounds or their acids / esters / salts: difenoxuron, chlofentezine, flufenoxuron, hexaflumuron, lufenuron, teflubenzuron, chlorfluazuron, bistrifluron, flucycloxuron, flumorfuron, flufenprox, fenoxycarb, methoxyfenozide, tebufenozide, hydroprene, kinoprene, methoprene, fenoxadiapropyl, pyriproxyfen, bistrifluron, chlorfluazuron, diflubenzuron, flufenprox, flufenoxuron, lufenuron, methoxyfenozide, teflubenzuron, or 2. A herbicidal composition according to claim 1, wherein the weight ratio of A to B in the herbicidal composition is from 1:100 to 100:1, 1:60 to 60:1, 1:30 to 30:1, 1:20 to 20:1, 1:16 to 10:1, 1:10 to 8:1, 1:6 to 4:1, 1:4 to 3:1, or 1:2 to 1:

1.

3. The herbicidal composition of claim 1, wherein the mass percentage of A and B in the herbicidal composition is from 1 to 95%, preferably from 1 to 80%, of the total amount.

4. A herbicidal composition according to any one of claims 1 to 3, wherein the herbicidal composition further comprises conventional adjuvants.

5. A herbicidal composition according to claim 4, wherein the conventional adjuvants include carriers and / or surfactants.

6. A herbicidal composition according to any one of claims 1 to 3, wherein the herbicidal composition further comprises at least one safener.

7. A herbicidal composition according to claim 6, wherein the safener is selected from one or more of isoxadifen-ethyl, cyprosulfamide, metcamifen, cloquintocet, and furilazole.

8. A herbicidal composition according to any one of claims 1 to 3, wherein the specific formulation of the herbicidal composition is dispersible oil suspension, aqueous suspension, suspoemulsion, wettable powder, emulsifiable concentrate, water dispersible granule, emulsion in water, or microemulsion.

9. Use of the herbicidal composition according to any one of claims 1 to 8 for controlling weeds.

10. A method for controlling the growth of unwanted plants, comprising applying the herbicidal composition according to any one of claims 1 to 8 to the plants, plant parts, plant seeds, or areas where the plants grow.

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