Weeding composition and application thereof

Abstract

The invention belongs to the field of pesticides, and particularly relates to a weeding composition and application thereof. The composition comprises an active component A and an active component B with effective weeding amounts, the active ingredient A is an active ingredient B, and the active ingredient B is selected from one or more of diflufenican, diflufenican, fluridone, toprazole fluridone, saflufenacil, flumioxazin and sulfentrazone. The composition can be used for effectively preventing and removing the problems of gramineous weeds, cyperaceae weeds, broadleaf weeds and the like; the herbicide composition has the characteristics of expanding the herbicide controlling spectrum, reducing the application amount, generating a synergistic effect, solving resistant weeds and the like.

Description

Technical Field

[0001] This invention belongs to the field of pesticides, specifically relating to a herbicidal composition and its application. Background Technology

[0002] Chemical weeding is the most economical and effective means of controlling weeds in farmland. However, long-term continuous high-dose use of a single type or a single mode of action of chemical herbicide can easily lead to problems such as herbicide resistance and resistance evolution in weeds.

[0003] The rational combination or mixing of herbicides has the advantages of broadening the weed spectrum, improving the control effect, and delaying the occurrence and development of herbicide resistance in weeds. It is one of the most effective methods to solve the above problems. In production, it is still necessary to develop herbicide composition varieties with high safety, broad weed control spectrum, synergistic effect and the ability to solve the problem of resistant weeds. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a herbicidal composition and its application. This composition effectively controls grasses, sedges, and broadleaf weeds, and features a broadened weed control spectrum, reduced application rate, synergistic effect, and the ability to control resistant weeds.

[0005] A herbicidal composition and its application, comprising herbicidally effective amounts of active ingredient A and active ingredient B, wherein,

[0006] Active ingredient A is

[0007] Active ingredient B is selected from one or more of the following compounds or their acids / esters / salts: pyrifluquinazon (CAS: 83164-33-4), flupyrazole (CAS: 137641-05-5), flupyridine (CAS: 59756-60-4), benzoxazole (CAS: 1992017-55-6), pyrimethanil (CAS: 372137-35-4), propyzoxystrobin (CAS: 103361-09-7), mesotrione (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 specific embodiment, the mass percentage of A and B in the herbicidal composition is 1-95% of the total, preferably 1-80%.

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

[0011] The term "carrier" in this article refers to an organic or inorganic, natural or synthetic substance. These facilitate the application of the active ingredient and are generally inert and must be agriculturally acceptable, particularly to the plant being treated. Carriers 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 gas, etc.

[0012] Surfactants can include emulsifiers, dispersants, or wetting agents, and can be ionic or nonionic. Examples that may be mentioned include salts of polyacrylic acid, lignin sulfonates, 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 (especially alkylphenols or arylphenols), sulfosuccinates, taurine derivatives (especially alkyl taurine esters), and phosphate esters of alcohols or polyhydroxyethylated phenols, alkyl sulfonates, alkyl aryl sulfonates, alkyl sulfates, lauryl ether sulfates, fatty alcohol sulfates, and sulfated hexadecyl, heptadecanols, and octadecyl alcohols, as well as sulfated fatty alcohol glycol ethers, and naphthalene or naphthalene sulfonic acid with phenol and formaldehyde. Condensations, polyoxyethylene octylphenyl ether, ethoxylated isooctylphenol, octylphenol or nonylphenol, alkylphenyl polyethylene glycol ether, tributylphenyl polyethylene glycol ether, tripearylphenyl polyethylene glycol ether, alkylaryl polyether alcohol, alcohols and fatty alcohols / ethylene oxide condensates, ethoxylated castor oil, polyoxyethylene alkyl ether, ethoxylated polyoxypropylene, lauryl polyethylene glycol ether acetal, sorbitan ester, lignin sulfite waste liquid, and proteins, denatured proteins, polysaccharides (e.g., methylcellulose), hydrophobically modified starch, polyvinyl alcohol, polycarboxylates, polyalkoxylated compounds, polyethyleneamine, polyvinylpyrrolidone and copolymers thereof. At least one surfactant is required to facilitate the dispersion of the active ingredients in water and to facilitate their proper application to plants.

[0013] The above composition may also contain various other components, such as protective colloids, adhesives, thickeners, thixotropic agents, penetrants, stabilizers, chelating agents, dyes, colorants, 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 includes at least one safener selected from:

[0016] a) Dichlorophenylpyrazoline-3-carboxylic acid (S1) compounds, preferably ethyl 1-(2,4-dichlorophenyl)-5-(ethoxycarbonyl)-5-methyl-2-pyrazoline-3-carboxylic acid (S1-1, mefenpyr-diethyl, PM, pp. 594-595), and related compounds described, for example, in WO91 / 07874 and PM (pp. 594-595).

[0017] b) Dichlorophenylpyrazole carboxylic acid derivatives, preferably compounds such as ethyl 1-(2,4-dichlorophenyl)-5-methylpyrazole-3-carboxylate (S1-2), ethyl 1-(2,4-dichlorophenyl)-5-isopropylpyrazole-3-carboxylate (S1-3), ethyl 1-(2,4-dichlorophenyl)-5-(1,1-dimethyl-ethyl)pyrazole-3-carboxylate (S1-4), ethyl 1-(2,4-dichlorophenyl)-5-phenylpyrazole-3-carboxylate (S1-5), and related compounds described in EP-A-333131 and EP-A-269806.

[0018] c) Triazole carboxylic acid (S1) compounds, preferably fenchlorazole, i.e., ethyl 1-(2,4-dichlorophenyl)-5-trichloromethyl-(1H)-1,2,4-triazole-3-carboxylate (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, preferably ethyl 5-(2,4-dichlorobenzyl)-2-isoxazoline-3-carboxylic acid (S1-7) or ethyl 5-phenyl-2-isoxazoline-3-carboxylic acid (S1-8) and related compounds described in WO91 / 08202, or ethyl 5,5-diphenyl-2-isoxazoline-3-carboxylic acid (S1-9, isoxadifen-ethyl) or n-propyl 5,5-diphenyl-2-isoxazoline-3-carboxylic acid (S1-10) or ethyl 5-(4-fluorophenyl)-5-phenyl-2-isoxazoline-3-carboxylic acid (S1-11) described in patent application (WO-A-95 / 07897).

[0020] e) 8-quinolinoxyacetic acid (S2) compounds, preferably 1-methylhexyl-1-yl(5-chloro-8-quinolinoxy)acetate (S2-1, cloquintocet-mexyl, such as PM (pages 195-196), (1,3-dimethylbut-1-yl)(5-chloro-8-quinolinoxy)acetate (S2-2), 4-allyloxybutyl(5-chloro-8-quinolinoxy)acetate (S2-3), 1-allyloxypropyl-2-yl(5-chloro-8-quinolinoxy)acetate (S2-4), (5-chloro- Ethyl 8-quinolinoxy)acetate (S2-5), methyl (5-chloro-8-quinolinoxy)acetate (S2-6), allyl (5-chloro-8-quinolinoxy)acetate (S2-7), 2-(2-propyliminooxy)-1-ethyl(5-chloro-8-quinolinoxy)acetate (S2-8), 2-oxopropyl-1-yl(5-chloro-8-quinolinoxy)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-quinolinoxy)malonic acid compounds, preferably, for example, diethyl (5-chloro-8-quinolinoxy)malonate, diallyl (5-chloro-8-quinolinoxy)malonate, methyl ethyl (5-chloro-8-quinolinoxy)malonate and related compounds described in EP-A-0582198.

[0022] g) Phenoxyacetic acid, phenoxypropionic acid or aromatic carboxylic acid active compounds, such as 2,4-dichlorophenoxyacetic acid (and ester) (2,4-D), 4-chloro-2-methylphenoxypropionate (2-methyl-4-chloropropionic acid (mecoprop)), MCPA or 3,6-dichloro-2-methoxybenzoic acid (and ester) (dicamba)

[0023] h) Pyrimidine active compounds, such as fenclorim (PM, pp. 386-387) (=4,6-dichloro-2-phenylpyrimidine),

[0024] i) Dichloroacetamide-type active compounds, commonly used as pre-emergence safeners (safeners acting on the soil), such as "dichloroacetamide" (PM, pages 270-271) (=N,N-diallyl-2,2-dichloroacetamide), "AR-29148" (=3-dichloroacetyl-2,2,5-trimethyl-1,3-oxazolidinone, purchased from Stauffer), "benoxacor" (PM, pages 74-75) (=4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine), "APPG-1292" (=N-allyl-N[(1,3-dioxolane-2-yl)-methyl]dichloroacetamide, purchased from PPGindustries), and "ADK-24". (=N-allyl-N-[(allylaminocarbonyl)-methyl]-dichloroacetamide, purchased from Sagro-Chem), “AAD-67” or “AMON4660” (=3-dichloroacetyl-1-oxa-3-aza-spiro[4,5]decane, purchased from Nitrokemia or Monsanto), “diclonon” or “ABAS145138” or “ALAB145138” (=(=3-dichloroacetyl-2,5,5-trimethyl-1,3-diazabicyclo[4.3.0]nonane, purchased from BASF), and “furilazol” or “AMON13900” (see PM, 482-483) (=(RS)-3-dichloroacetyl-5-(2-furanyl)-2,2-dimethyloxazolidinone),

[0025] j) Dichloroacetone derivatives, such as "AMG191" (CAS Registry No. 96420-72-3) (=2-dichloromethyl-2-methyl-1,3-dioxolane, purchased from Nitrokemia).

[0026] k)Oxy-imino compounds are active compounds, known as seed dressing agents. Examples include "oxabetrinil" (PM, page 689) (=(Z)-1,3-dioxolane-2-ylmethoxyimino(phenyl)acetonitrile), which is used as a safer in seed dressing to prevent damage from metolachlor; and "fluxofenim" (PM, pages 467-468) (=1-(4-chlorophenyl)-2, 2,2-Trifluoro-1-acetone O-(1,3-dioxolane-2-ylmethyl)-oxime, which is used as a safer in seed dressing to prevent damage from metolachlor, and "cyometrinil" or "A-CGA-43089" (PM, page 983) (=(Z)-cyanomethoxyimino(phenyl)acetonitrile), which is also used as a safer in seed dressing to prevent damage from metolachlor.

[0027] 1) Thiazole carboxylic acid ester active compounds, known as seed dressing agents, such as "flurazol" (PM, pp. 450-451) (=2-chloro-4-trifluoromethyl-1,3-thiazol-5-carboxylic acid benzyl ester), which is used as a safener in seed dressing to prevent damage from alachlor and metolachlor.

[0028] m) Naphthalene dicarboxylic acid derivatives, which are active compounds known as seed dressing agents, such as "naphthalene dicarboxylic anhydride" (PM, pp. 1009-1010) (=1,8-naphthalene dicarboxylic anhydride), are used as safeners in corn seed dressing to prevent damage from thiocarbamate herbicides.

[0029] n) Active compounds derived from chromaneacetic acid, such as "ACL304415" (CAS Registry No. 31541-57-8) (=2-84-carboxychromane-4-yl)acetic acid, purchased from American Cynam.

[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 this invention, the salt of the compound is preferably an alkali metal salt (such as lithium, sodium, and potassium salts), an alkaline earth metal salt (such as calcium and magnesium salts), a transition metal salt (such as manganese, copper, zinc, and iron salts), an ammonium salt, or a substituted ammonium salt in which 1-4 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 groups, preferably ammonium, methylammonium, isopropylammonium, dimethylammonium, diisopropylammonium, trimethylammonium, heptylammonium, dodecylammonium, tetradecylammonium, tetramethylammonium, tetraethylammonium, tetrabutylammonium, or 2-hydroxyammonium. Ethylammonium (alcoholic acid salt), 2-(2-hydroxyeth-1-oxy)eth-1-ylammonium (diethylene glycolamine salt), di(2-hydroxyeth-1-yl)ammonium (diethylene glycolamine salt), tri(2-hydroxyethyl)ammonium (triethanolamine salt), tri(2-hydroxypropyl)ammonium, benzyltrimethylammonium, benzyltriethylammonium, N,N,N-trimethylethanolammonium (choline salt), and also phosphonium ions, sulfonium ions, preferably tri(C1-C4 alkyl)sulfonium, such as trimethylsulfonium, and sulfonium oxide ions, preferably tri(C1-C4 alkyl)sulfonium oxide, and finally, in the form of salts of polyamines such as N,N-di(3-aminopropyl)methylamine and diethylenetriamine.

[0034] In the context of this invention, the ester of the compound, for example as an alkyl ester, alkenyl ester, alkynyl ester, alkoxyalkyl ester, tetrahydrofuranylmethyl ester, and the corresponding thioester, is preferably C1-C. 10 Alkyl esters, C2-C 10 alkenyl ester, C2-C 10 alkynyl esters, C1-C 10 Alkoxy C1-C 10 Alkyl esters, (tetrahydrofuran-2-yl)methyl esters, and corresponding thioesters. Preferred C1-C 10 Alkyl esters or C1-C 10 Alkyl thioesters are, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, methylhexyl (1-methylhexyl), methylheptyl (1-methylheptyl), heptayl, octyl, or isooctyl (2-ethylhexyl) esters. Preferred C1-C... 10 Alkoxy-C1-C 10 Alkyl esters are C1-C4 alkoxyethyl esters, such as 2-methoxyethyl, 2-ethoxyethyl, 2-butoxyethyl (butoxyethyl), 2-butoxypropyl, or 3-butoxypropyl esters.

[0035] The compositions of the present invention can be diluted or used directly by the user before use. They can be prepared by conventional processing methods, namely, mixing the active substance with a liquid solvent or solid carrier, and then adding one or more surfactants such as dispersants, stabilizers, wetting agents, binders, and defoamers.

[0036] The specific formulations of the herbicidal composition are dispersible oil suspensions, aqueous suspensions, emulsions, wettable powders, emulsifiable concentrates, water-dispersible granules (dry suspensions), water emulsions, and microemulsions.

[0037] In short, the compositions of the present invention can be mixed with solid and liquid additives conventionally used in prior art formulations. The amount of active ingredient used varies with changing external conditions, such as temperature, humidity, and the nature of the herbicide used. It can vary considerably, for example, from 0.001 to 2.0 kg / ha, or more active substances, but is preferably between 0.003 and 1.0 kg / ha, particularly between 5 and 500 g / ha.

[0038] The present invention also provides an application of the herbicidal composition in controlling weeds; and a method for controlling unwanted plant growth, comprising applying the herbicidal composition to a plant, plant part, plant seed or area where the plant is growing.

[0039] In addition, the composition of the present invention can be applied to the leaves of the plant to be treated by spraying, i.e., applied to weeds, especially to surfaces that are infested or susceptible to weed infestation.

[0040] When the herbicidal compositions of the present invention are applied, unexpected synergistic effects are achieved, and the herbicidal activity is significantly greater than the expected sum of the activities of using a single herbicide, as well as the activity of a single herbicide. The synergistic effects manifest as reduced application rates, a broader spectrum of weed control, faster and more sustained weed control—characteristics needed in weed control practices. In terms of the described properties, these new compositions are significantly superior to existing herbicides, achieving reduced application rates and being more environmentally friendly.

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

[0042] (1) The compositions of the present invention are environmentally friendly and are easily degraded in the environment.

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

[0044] All patents, patent applications and publications mentioned or cited in this article are incorporated herein by reference in their entirety as if they were cited individually. Detailed Implementation

[0045] The following examples are not intended to limit the invention, but are merely illustrative of how the invention is implemented. These examples demonstrate particularly significant effectiveness against certain weeds. Examples are as follows:

[0046] Efficacy test (soil sealing treatment):

[0047] 1) Cultivation conditions

[0048] The process is carried out in a controlled greenhouse with a temperature of 20–30°C, natural light, and a relative humidity of 55%–75%.

[0049] The soil type was loam, with an organic matter content of 1.63%, pH = 7.1, available nitrogen 84.3 mg / kg, available phosphorus 38.5 mg / kg, and available potassium 82.1 mg / kg. The soil was quantitatively filled to 3 / 4 full in pots, and then watered from the bottom to completely saturate the soil. The tested weed seeds were pre-germinated until they showed signs of germination, then evenly and quantitatively sown on the surface, covered with 0.5-1 cm of soil depending on seed size, and left to germinate for 72 hours.

[0050] 2) Experimental Design

[0051] 2.1) Reagents

[0052] 2.1.1) Test reagents

[0053] The required active ingredients were purchased from reagent companies or synthesized using conventional methods. All raw materials were diluted with acetone as a solvent and diluted with a 0.1% Tween-80 emulsifier aqueous solution, and diluted immediately before use.

[0054] 2.2) Test Treatment

[0055] 2.2.1) Dosage setting

[0056] When determining the distribution ratio or content of active ingredient A and active ingredient B in each group, the characteristics of action and toxicity of the two agents should be considered, as well as the main purpose of the formulation. Based on preliminary tests, this study sets the dosages of active ingredients A and B, both individually and in combination, as shown in the table. Water containing the same solvent and emulsifier but without any agents was used as a blank control.

[0057] 2.2.2) Experimental repetition

[0058] Each treatment was repeated 4 times, with 3 pots per treatment per session, and 30 weed seeds sown in each pot.

[0059] 3) Test methods

[0060] Before treatment, irrigate to maintain a 1-2 cm water layer. Use a pipette to take a quantitative amount of drug solution and irrigate according to the experimental design, from low dose to high dose, with each treatment repeated 4 times. After treatment, transfer to a greenhouse for routine cultivation, maintaining a 1-2 cm water layer throughout the experiment.

[0061] 4) Data survey and statistical analysis

[0062] 4.1) Survey Methods

[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]

[0071] Table 2A Evaluation of the actual control efficacy and combined effects of flupyridine against ryegrass.

[0072]

[0073] Table 3A Evaluation of the actual control efficacy and combined effects of flupyridine against ryegrass.

[0074]

[0075] Table 4A Evaluation of the actual control efficacy and combined effects of the mixed benzoxazole-fluoxetine against bromegranate

[0076]

[0077]

[0078] Table 5A Evaluation of the actual control efficacy and combined effects of the mixed sulfadiazine and bensulfuron-methyl against bromegrass.

[0079]

[0080] Table 6A Evaluation of the actual control efficacy and combined effects of the combination of propyzinamide and flumetsulam against brome.

[0081]

[0082] Table 7A Evaluation of the actual control efficacy and combined effects of the combination of mesotrione and chlorpyrifos against brome.

[0083]

[0084] Table 8A Mixtures Evaluation of actual control efficacy and combined effects against ryegrass

[0085]

[0086] Through extensive experimentation and exploration, this invention unexpectedly discovered that the composition exhibits a surprising and unexpected synergistic effect when used to control major grasses, sedges, and broadleaf weeds. This synergistic effect is more pronounced at low doses, which can reduce the amount of pesticide used and reduce environmental pollution. Furthermore, the rational compounding reduces agricultural costs and has excellent application prospects.

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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