Herbicidal compositions comprising mefluidin and their use

Abstract

The present application belongs to the field of pesticides, and particularly relates to a herbicidal composition containing tetrafluorobenzalam and application thereof. The composition comprises a herbicidal effective amount of active ingredient A and active ingredient B, wherein the active ingredient A is tetrafluorobenzalam; the active ingredient B is selected from one or more of the following compounds or one or more of the acid / ester / salt thereof: propachlor, bensulfuron-methyl, anilofos, tefuryltrione, fenoxasulfone, furilazole, acetochlor, oxadiazon, oxadiargyl, pentoxazyl, oxyfluorfen, mesotrione, bicyclopyrone, furametpyr, etc. The composition can effectively prevent and control the problems of gramineae, cyperaceae, broadleaf weeds, etc., has the characteristics of expanding the herbicidal spectrum, reducing the application amount, being able to produce a synergistic effect and solving the problem of resistant weeds, etc.

Description

Technical Field

[0001] This invention belongs to the field of pesticides, specifically relating to a herbicidal composition containing tetraflufenican 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] Tetflupyrolimet is a herbicide from FMC Corporation with a novel mechanism of action. It can control major weeds in paddy fields, as well as key hard-to-control broadleaf weeds and sedges, throughout the season.

[0004] 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

[0005] To address the aforementioned problems in the prior art, this invention provides a herbicidal composition containing tetraflufenican and its application. This composition effectively controls grasses, sedges, and broadleaf weeds, and features a broadened weed control spectrum, reduced application rate, synergistic effects, and the ability to control resistant weeds.

[0006] A herbicidal composition comprising tetraflufenican and its application, comprising herbicidally effective amounts of active ingredient A and active ingredient B, wherein,

[0007] Active ingredient A is tetraflufenican (CAS: 2053901-33-8);

[0008] Active ingredient B is selected from one or more of the following compounds or their acids / esters / salts: pretilachlor (CAS: 51218-49-6), bensulfuron-methyl (CAS: 73250-68-7), sparphos (CAS: 64249-01-0), tetrazolium-methyl (CAS: 158237-07-1). fenoxasulfone (CAS: 639826-16-7), sulfadiazine (CAS: 447399-55-5), acetochlor (CAS: 34256-82-1), oxadiazon (CAS: 19666-30-9), propyzoxystrobin (CAS: 39807-15-3), pendimethalin (CAS: 110956-75-7), ethoxyflufenoxam (CAS: 42874-03-3), mesotrione (CAS: 104206-82-8), bicyclosulfuron (CAS: 639826-16-7), sulfadiaz ... :156963-66-5), furazolidone (CAS:473278-76-1), fenquinotrione (CAS:1342891-70-6), bensulfuron-methyl (CAS:83055-99-6), penoxsulam (CAS:219714-96-2), flufensulfuron-methyl (CAS:874195-61-6), pyriflusulfuron-methyl (CAS:221205-90-9), pyrimisulfuron-methyl (CAS:868680-84-6), pyrimisulfuron-methyl (CAS: 93697-74-6), ethoxysulfuron-methyl (CAS:126801-58-9), oxadiazon (CAS:87820-88-0), benzopropazon. Pendimethalin (CAS: 40487-42-1), Sec-Butadiene (CAS: 33629-47-9), Oxadiazon (CAS: 153197-14-9), 2,4-D sodium salt (CAS: 3653-48-3), Fluroxypyr ester (CAS: 943831-98-9), Quinclorac (CAS: 84087-01-4), Quinclorac (CAS: 130901-36-8), Bentazon (CAS: 25057-89-0), Glyphosate (CAS: 1071-83-6), Glufosinate (CAS: 77182-82-2).

[0009] The weight ratio of A to B in the herbicidal composition is 1:100-100:1, 1:60-50:1, 1:50-40:1, 1:40-20:1, 1:30-10:1, 1:20-5:1, 1:15-1:1, or 1:10-1:5.

[0010] The mass percentage of A and B in the herbicidal composition is 1-95% of the total, preferably 1-80%.

[0011] The herbicidal composition also contains conventional adjuvants, including carriers and / or surfactants.

[0012] 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.

[0013] 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, heptadecyl, and heptadecyl sulfates. And octadecyl alcohol and sulfated fatty alcohol glycol ethers, in addition to condensates of naphthalene or naphthalenesulfonic acid with phenol and formaldehyde, polyoxyethylene octylphenyl ether, ethoxylated isooctylphenol, octylphenol or nonylphenol, alkylphenyl polyethylene glycol ether, tributylphenyl polyethylene glycol ether, tripearylphenyl polyethylene glycol ether, alkylaryl polyether alcohol, alcohol and fatty alcohol / 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.

[0014] 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.

[0015] 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, naphthalenepropionylchlor, R-L-naphthalenepropionylchlor, propargite, bensulfuron-methyl, bisbensulfuron-methyl, pyrfluthrin, chlorpyrifos, flubutyroxychlor, brobutyroxychlor, dimethoprim, high-efficiency dimethoprim, ethoxybensulfuron, fluthiachlor Methoxythiamethoxam, pyrazosulfuron, isoxaflutole, high-efficiency methyl methacrylate, high-efficiency methyl methacrylate, dipropionyl chlorpyrifos, clethodim, butyrazosulfuron, cyclopropionyl chlorpyrifos, flusulfuron-methyl, heptanosulfuron-methyl, isobutyrazosulfuron, propyzoxystrobin, terbutyrazosulfuron, methyl methoxysulfuron, metolachlor, methyl methoxysulfuron, chlorpyrifos, acetochlor, chlorpyrifos, valerate, chlorpyrifos ... Chlorpyrimethanil, Butamidine, Flupyrazole, Atrazine, Simazine, Promethazine, Cypermethrin, Cypermethrin, Atrazine, Promethazine, Isopropylamine, Fluroxypyr, Terbutaline, Terbutaline, Triazine Fluroxypyr, Cyprodinil, Glyphosate, Glyphosate, Promethazine, Simazine, Azoxystrobin, Dichlorvos, Isopropylamine, Cyprodinil, Metazine, Butazine, Terbutaline, Methoxystrobin, Cypermethrin, Clonazine, Atrazine, Metazine, Glycyrrhizin, Cyanobacterium, Indaziflam, Chlorsulfuron-methyl, Metsulfuron-methyl, Bensulfuron-methyl, Thiazidosulfuron-methyl Sulfuron, pyrimisulfuron, mesosulfuron-methyl, sodium mesosulfuron-methyl, formamidosulfuron, ethersulfuron, etherbenzylsulfuron, methylsulfuron, nicosulfuron, ambenzylsulfuron, acylsulfuron, ethoxysulfuron, cypropyrimisulfuron, sulfadiazine, tetrazolium sulfadiazine, pyrimisulfuron, monopyrimisulfuron, monopyrimisulfuron, fluazolium sulfadiazine, flupyrimisulfuron, epoxysulfuron, azpyrimisulfuron, flupyrimisulfuron, propanilsulfuron, trifluoropropanesulfuron, sulfonylsulfuron, trifluorosulfuron, flumethinazole, trifluoromethylsulfuron, sodium mesosulfuron, flupyrimisulfuron, methylthionylsulfuron, pyrimisulfuronPropyrisulfuron, pyrimisulfuron, trifluralin, flusulfanilamide, quizalofop-P-ethyl, ethoxyfluralin, oxyfluorfen, glufosinate, bensulfuron-methyl, methylflufenican, trifluralin, methoxyflufenican, trifluralin, flufenoxuron, flufenoxuron, oxyfluorfen, metolachlor, dimethoate, flufenoxuron, flufenoxuron-methyl, halosaf en, chlorpyrifos, isoproturon, linuron, diuron, sapura, fluroxypyr, bensulfuron, methyl bensulfuron, benzalkonium chloride, sulfothiamethoxam, isoxaflutole, terbuthiamethoxam, clodinafop-methyl, chlorobromosulfuron, methyl methoxysulfuron, bromonazine, methoxysulfuron, chlorpyrifos, metribuzin, cycloroxypyr, feloxysulfuron, flusulfuron, fenflurium, fenflurium, fenflurium, isouron, cycloroxypyr, thiamethoxam, butiflutole, fenflurium Fluroxyfen, methamidophos, thiamethoxam, trimethourea, oxazolone, Monisouron, Anisuron, Methiuron, Chloreturon, tetrafluroxyfen, betaine, betaine-ethyl, betaine acetamiprid, sulfadiazine, terbufos, oat chlorpyrifos, chlorfenapyr, dichlorvos, metribuzin, chlorpyrifos, Carboxazole, Chlorprocarb, Fenasulam, BCPC, CPPC, Carbasulam, butadiene, quizalofop-p-ethyl ... Isooctyl ester butyl ester, 2,4-methylchlorosodium ester, 2,4-D isooctyl ester isooctyl ester, 2,4-methylchloroisooctyl ester, 2,4-D isooctyl ester sodium salt, 2,4-D isooctyl ester dimethylamine salt, 2,4-methylchloroethyl thioester, 2,4-methylchloro, 2,4-D isooctyl ester propionate, high-2,4-D isooctyl ester propionate, 2,4-D isooctyl ester butyrate, 2,4-methylchloropropionate, 2,4-methylchloropropionate, 2,4,5-chlorobutyrate, 2,4,5-tetrate, 2,4,5-tetrate propionate2,4,5-Tybutyric acid, MCPA, dicamba, sphagnum mofetil, cyhalothrin, trichlorobenzoic acid, aminodichlorobenzoic acid, methoxytrichlorobenzoic acid, quizalofop-p-ethyl, pyrfluthrin, quizalofop-p-ethyl, flupyrfluthrin, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, cyhalofop-p-ethyl, quizalofop-p-ethyl, cyhalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, quizalofop-p-ethyl, isoxaflutole, paraquat, diquat, sulfadiazine, ethylbutene Fluroxyfen, isoprofluoxane, mesulfuron-methyl, cyprofluoxane, aminoprophalin, ethylfluoxane, chlorfluoxane, aminoprophalin, diflubenzuron, chlorfluoxane, methalpropalin, propanol, glyphosate, barnyardphos, glufosinate, methylammonium glyphosate, glufosinate, piperazine, diammonium phosphate, dimethoate, phosmet, fenpropathrin, phosmet, phosmet, dimethoate, phosmet, imidacloprid, imidacloprid, imidacloprid, imidacloprid acetic acid, imidacloprid quinolinic acid, methoxymethylene, methoxymethylene ammonium salt, imidacloprid acetic acid, imidacloprid Clethodim, clopyralid, isooctyl clopyralid, diclopyridine, aminopyridine, triclopyralid, flusulfuron, haloxyfop, triclopyrrolidine, thiamethoxam, flupyridine, clopyralid, flupyridine, triclopyralid butoxyethyl, cliodinate, clethodim, thiamethoxam, quizalofop-p-ethyl, cyclobenzanone, butanzanone, oxadiazon, pyranazon, buthidazole, cyproconazole, cyclobenzanone, oxadiazonone, ethazonone, A Metridione, Amibuzin, Bromobenzonitrile, Octanoyl Bromobenzonitrile, Octanoyl Iodobenzylnitrile, Iodobenzylnitrile, Diphenylacetonitrile, Bisoxadiazon, Hydroxydiazonil, Iodobonil, Isopyrimidinesulfuron, Diflubenzuron, Penflubenzuron, Sulfurazolidone, Chlorpyrifos-sulfuron, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, Bisoxadiazon, BisoxadiazonMethiozolin, isopyrazosulfuron, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, bensulfuron, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, flumetsulam, pyrazosulfuron, pyrazosulfuron, pyrazosulfuron, flumetsulam, mesotrione, pyrazosulfuron, flupropargyl, pyrazosulfuron ... Amine, Phthalobenzyl ether, Flumezin, Pentachlorophenol (sodium), Dichlorophen, Teroxyphen, Teroxyphenate, Pentylnitrophenol, Dinitrophenol, Chlornitol, Dichlorophenate, Dichlorophenate, Propyleneoxadiazon, Oxadiazon, Cyclopentazoline, Flupyrazosulfuron, Metazolidinyl, Tetracycline, Flupyrazosulfuron, Herbicides, Bromhexidine, Dimethomorph, Pyridafol, Pyridafol, Pyridafol, Pyridafol, Pyridafol, Quinolinic acid, Chloroquinolinic acid, Bendasone, Pyridafol, Oxadiazon, Oxadiazon, Isoxadiazon, Cyclohexidine, Isopropyltrimethoate, Propyltrimethoate Ether, indoxacarb, sodium chlorate, cypermethrin, trichloroacetic acid, monochloroacetic acid, hexachloroacetone, tetrafluoropropionic acid, forage granules, 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, Diethamquat, Etnipromid, Iprymidam, Ipfencarba zone, Thiencarbazone-methyl, Pyrimisulfan, Chlorflurazole, Tripropindan, Sulglycapin, methylsulfuron, Cambendichlor, Cyproterinic acid, Thiocyanaaniline, Herbicides, Herbicides, Herbicides, Herbicides, Herbicides, Herbicides, Herbicides, Herbicides, Herbicides, Herbicides, Pyrazole Herbicides, Furazolidone, Herbicides, Bisbenazolic acid, Dichloropropene, Fluorochloropyridine ester, DOW chloropyridinium ester, UBH-509, D489, LS 82-556, KPP-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.

[0016] The herbicidal composition further includes at least one safener selected from:

[0017] 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).

[0018] 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.

[0019] 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).

[0020] 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).

[0021] 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), ethyl acetate (5-chloro-8-quinolinoxy)acetate (S2-5), and methyl acetate (5-chloro-8-quinolinoxy)acetate (S2-6). (5-chloro-8-quinolinoxy)acetic acid allyl ester (S2-7), 2-(2-propyliminooxy)-1-ethyl(5-chloro-8-quinolinoxy)acetic acid ester (S2-8), 2-oxopropyl-1-yl(5-chloro-8-quinolinoxy)acetic acid ester (S2-9), and related compounds described in EP-A-86750, EP-A-94349 and EP-A-191736 or EP-A-0492366.

[0022] 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.

[0023] 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)

[0024] h) Pyrimidine active compounds, such as fenclorim (PM, pp. 386-387) (=4,6-dichloro-2-phenylpyrimidine),

[0025] i) Dichloroacetamide-type active compounds, commonly used as pre-emergence safeners (safeners acting on the soil), such as "dichloroacetamide" (PM, pp. 270-271) (=N,N-diallyl-2,2-dichloroacetamide), "AR-29148" (=3-dichloroacetyl-2,2,5-trimethyl-1,3-oxazolidinone, purchased from Stauffer), and "benoxacor" (PM, pp. 74-75). Page (=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 PPG Industries), “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),

[0026] j) Dichloroacetone derivatives, such as "AMG191" (CAS Registry No. 96420-72-3) (=2-dichloromethyl-2-methyl-1,3-dioxolane, purchased from Nitrokemia).

[0027] k) Oxy-imino compounds are active compounds, known as seed dressing agents, such as "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; "fluxofenim" (PM, pages 467-468) (=1-(4-chlorophenyl)-2,2,2-trifluoro-1-ethylone 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, used as a safer in seed dressing to prevent damage from metolachlor,

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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).

[0032] 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).

[0033] 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.

[0034] 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 wherein 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, preferably ammonium, methylammonium, isopropylammonium, dimethylammonium, diisopropylammonium, trimethylammonium, heptylammonium, dodecylammonium, tetradecylammonium, tetramethylammonium, tetraethylammonium, tetrabutylammonium, 2-hydroxyethylammonium (alkanolamine salt), 2-(2- Hydroxyethyl-1-oxy)ethyl-1-ylammonium (diethylene glycolamine salt), di(2-hydroxyethyl-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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The synergistic herbicidal composition of the present invention also has the following advantages:

[0043] (1) The compositions of the present invention are environmentally friendly and are easily degraded in the environment.

[0044] (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.

[0045] 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

[0046] 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:

[0047] A) Example

[0048] 1. Tetrafluthrin + Pretilachlor (4+15) EC

[0049] 4% tetraflufenican + 15% pretilachlor + 10% N-methylpyrrolidone + 5% calcium dodecylbenzenesulfonate + 5% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0050] 2. Tetrafluthrin + Benthiamethoxam (4+20) Dispersible Oil Suspension

[0051] 4% tetraflufenican + 20% benzyl sulfadiazine + 6% calcium dodecylbenzenesulfonate + 7% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 1% organobentonite + 1% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0052] 3. Tetrafluthrin + Phosphamidon (4+9) EC

[0053] 4% tetraflufenican + 9% sphagnum molybdenum + 10% N-methylpyrrolidone + 4% calcium dodecylbenzenesulfonate + 6% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0054] 4. Tetrafluthrin + Tetrafluthrin (4+7) EC

[0055] 4% tetraflufenican + 7% tetrazolium oxychloride + 12% N-methylpyrrolidone + 4% calcium dodecylbenzenesulfonate + 6% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0056] 5. Tetrafluthrin + fenoxasulfone (4+4) emulsifiable concentrate

[0057] 4% tetraflufenazate + 4% fenoxasulfone + 12% N-methylpyrrolidone + 3% calcium dodecylbenzenesulfonate + 7% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0058] 6. Tetrafluthrin + Sulfonazole (4+1) aqueous suspension

[0059] 4% tetraflufenican + 1% sulfonylpyrazine + 4% phenethylphenol polyoxyethylene ether phosphate triethanolamine salt + 2% comb polycarboxylate + 2% fatty alcohol polyoxyethylene ether + 0.2% xanthan gum + 2.5% magnesium aluminum silicate + 0.1% defoamer + 0.05% Kathon + 5% ethylene glycol + deionized water to make up the balance.

[0060] 7. Tetrafluthrin + Acetochlor (4+3) EC

[0061] 4% tetraflufenican + 3% acetochlor + 10% N-methylpyrrolidone + 4% calcium dodecylbenzenesulfonate + 6% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0062] 8. Tetrafluthrin + Oxadiazon (4+6) EC

[0063] 4% tetraflufenican + 6% oxadiazon + 10% N-methylpyrrolidone + 4% calcium dodecylbenzenesulfonate + 6% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0064] 9. Tetrafluthrin + propyzoxystrobin (4+3) EC

[0065] 4% tetraflufenican + 3% propyzamide + 10% N-methylpyrrolidone + 5% calcium dodecylbenzenesulfonate + 5% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0066] 10. Tetrafluthrin + Cypermethrin (4+6) EC

[0067] 4% tetraflufenican + 6% cyclopentoxane + 12% N-methylpyrrolidone + 3% calcium dodecylbenzenesulfonate + 7% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0068] 11. Tetrafluthrin + Ethoxyfluorfen (4+2) EC

[0069] 4% tetraflufenican + 2% ethoxyflufenican + 10% N-methylpyrrolidone + 4% calcium dodecylbenzenesulfonate + 6% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0070] 12. Tetrafluthrin + nicosulfuron (4+3) aqueous suspension

[0071] 4% tetraflufenican + 3% nicosulfuron + 4% phenethylphenol polyoxyethylene ether phosphate triethanolamine salt + 2% comb polycarboxylate + 2% fatty alcohol polyoxyethylene ether + 0.2% xanthan gum + 2.5% magnesium aluminum silicate + 0.1% defoamer + 0.05% Kathon + 5% ethylene glycol + deionized water to make up the balance.

[0072] 13. Tetrafluthrin + Bicyclosulfuron (4+6) Dispersible Oil Suspension

[0073] 4% tetraflufenican + 6% bicyclosulfonamide + 6% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 4% fatty acid polyoxyethylene ester + 2.2% organobentonite + 2% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0074] 14. Tetrafluthrin + Furazolidone (4+2) Dispersible Oil Suspension

[0075] 4% tetraflufenican + 2% furazolidone + 4% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 6% fatty acid polyoxyethylene ester + 2.2% organobentonite + 2.2% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0076] 15. Tetrafluthrin + fenquinotrione (4+4) dispersible oil suspension

[0077] 4% tetrafluoromethyl chlorpyrifos + 4% fenquinotrione + 6% calcium dodecylbenzenesulfonate + 5% cashew phenol polyoxyethylene ether + 7% fatty acid polyoxyethylene ester + 2.2% organobentonite + 2.2% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0078] 16. Tetrafluthrin + bensulfuron-methyl (4+1) dispersible oil suspension

[0079] 4% tetraflufenican + 1% bensulfuron-methyl + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.5% organobentonite + 2.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0080] 17. Tetrafluthrin + penoxsulam (4+1) dispersible oil suspension

[0081] 4% tetraflufenican + 1% penoxsulam + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.5% organobentonite + 2.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0082] 18. Tetrafluthrin + Flumetsulam (4+1) Dispersible Oil Suspension

[0083] 4% tetraflufenican + 1% flufenoxuron + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.5% organobentonite + 2.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0084] 19. Tetrafluthrin + pyriflusulfonamide (4+2) dispersible oil suspension

[0085] 4% tetraflufenican + 2% pyrimethanil + 6% calcium dodecylbenzenesulfonate + 7% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.4% organobentonite + 2.4% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0086] 20. Tetrafluthrin + pyrimisulfuron (4+3) dispersible oil suspension

[0087] 4% tetraflufenican + 3% pyrimisulfuron + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.2% organobentonite + 2.2% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0088] 21. Tetrafluthrin + Pyrimisulfuron (4+1) Dispersible Oil Suspension

[0089] 4% tetraflufenican + 1% pyrimisulfuron + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.5% organobentonite + 2.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0090] 22. Tetrafluthrin + Ethoxysulfuron (4 + 0.3) Dispersible Oil Suspension

[0091] 4% tetraflufenican + 0.3% ethoxysulfuron + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.5% organobentonite + 2.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0092] 23. Tetrafluthrin + oxadiazon (4+5) EC

[0093] 4% tetraflufenican + 5% oxime + 12% N-methylpyrrolidone + 3% calcium dodecylbenzenesulfonate + 7% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance

[0094] 24. Tetrafluthrin + Benprofen (4+3) EC

[0095] 4% tetraflufenican + 3% phenylpropargyl + 10% N-methylpyrrolidone + 4% calcium dodecylbenzenesulfonate + 6% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0096] 25. Tetrafluthrin + Pendimethalin (4+30) EC

[0097] 4% tetraflufenican + 30% pendimethalin + 12% N-methylpyrrolidone + 3% calcium dodecylbenzenesulfonate + 7% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0098] 26. Tetrafluthrin + Butylchlor (2+25) EC

[0099] 2% tetraflufenican + 25% sec-butylamine + 10% N-methylpyrrolidone + 3% calcium dodecylbenzenesulfonate + 7% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0100] 27. Tetrafluthrin + Oxadiazon (4+1) Dispersible Oil Suspension

[0101] 4% tetraflufenican + 1% oxadiazon + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 2.5% organobentonite + 2.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0102] 28. Tetrafluthrin + MCPA sodium salt (4+15) dispersible oil suspension

[0103] 4% tetrafluoromethane + 15% sodium dimethyl chlorosulfonate + 5% calcium dodecylbenzenesulfonate + 8% cashew phenol polyoxyethylene ether + 5% fatty acid polyoxyethylene ester + 1.5% organobentonite + 1.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0104] 29. Tetrafluthrin + Fluopyridine (4+0.3) EC

[0105] 4% tetraflufenican + 0.3% fluchloropyridine ester + 10% N-methylpyrrolidone + 4% calcium dodecylbenzenesulfonate + 6% phenethylphenol polyoxyethylene ether + 200# solvent oil to make up the balance.

[0106] 30. Tetrafluthrin + Quinclorac (4+5) Dispersible Oil Suspension

[0107] 4% tetrafluoromethylamine + 5% quinclorac acid + 5% calcium dodecylbenzenesulfonate + 5% cashew phenol polyoxyethylene ether + 8% fatty acid polyoxyethylene ester + 2% organobentonite + 2% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0108] 31. Tetrafluthrin + Quincloprid (4+3.5) dispersible oil suspension

[0109] 4% tetraflufenican + 3.5% quinclorac + 4% calcium dodecylbenzenesulfonate + 6% cashew phenol polyoxyethylene ether + 8% fatty acid polyoxyethylene ester + 2.2% organobentonite + 2.2% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0110] 32. Tetrafluthrin + Bentazon (4+20) Dispersible Oil Suspension

[0111] 4% tetraflufenican + 20% bentazon + 5% calcium dodecylbenzenesulfonate + 5% cashew phenol polyoxyethylene ether + 8% fatty acid polyoxyethylene ester + 0.8% organobentonite + 0.8% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0112] 33. Tetrafluthrin + glyphosate (4+30) dispersible oil suspension

[0113] 4% tetraflufenican + 30% glyphosate + 4% calcium dodecylbenzenesulfonate + 7% cashew phenol polyoxyethylene ether + 7% fatty acid polyoxyethylene ester + 0.5% organobentonite + 0.5% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0114] 34. Tetrafluthrin + glufosinate (4+18) dispersible oil suspension

[0115] 4% tetraflufenican + 18% glufosinate + 4% calcium dodecylbenzenesulfonate + 6% cashew phenol polyoxyethylene ether + 8% fatty acid polyoxyethylene ester + 1% organobentonite + 1% fumed silica + 3% 200# solvent oil + Grade 1 soybean oil to make up the balance.

[0116] The processing equipment for the above emulsifiable oil includes: a vacuum pump, a batching vessel, and a storage tank.

[0117] The above-mentioned emulsifiable oil processing procedure is as follows: all materials are put into the mixing tank, stirred and dissolved until completely transparent, and after passing the test, they are transferred to the storage tank for filling.

[0118] The above-mentioned water suspension processing equipment includes: mixing tank, colloid mill, sand mill, shearing machine, etc.

[0119] The above-mentioned water suspension processing procedure is as follows: all materials are put into a mixing tank, stirred and mixed, then passed through a colloid mill, then entered a three-stage sand mill, and finally sheared evenly in a shearing machine. After passing the test, the materials are transferred to a storage tank for filling.

[0120] The above-mentioned equipment for processing dispersible oil suspensions includes: mixing tank, colloid mill, sand mill, shearing machine, etc.

[0121] The above-mentioned dispersible oil suspension processing procedure is as follows: all materials are put into a mixing tank, stirred and mixed, then passed through a colloid mill, then entered a sand mill for three-stage sand milling, and finally sheared evenly in a shearing machine. After passing the test, the mixture is transferred to a storage tank for filling.

[0122] B) Pharmacological efficacy test

[0123] Post-emergence foliar spraying:

[0124] 1) Test conditions

[0125] 1.1) Test Target

[0126] Weeds were cultivated using a pot method, with 180x140mm plastic seedling pots placed in enamel trays. The pots were filled with topsoil (4 / 5 full) collected from farmland, dried and sieved. The soil moisture was initially controlled at 20%. Weed seeds with plump and uniform grains were selected, soaked in 25℃ warm water for 6 hours, and germinated in a 28℃ biochemical incubator (in darkness). The newly sprouted weed seeds were then evenly placed on the soil surface and covered with 0.5-1cm of soil, depending on the seed size.

[0127] 1.2) Cultivation conditions

[0128] The experiment was conducted in a controlled greenhouse at a temperature of 20–30°C, under natural light, and with a relative humidity of 57%–72%. The soil type was loam, with an organic matter content of 1.63%, pH = 7.1, available nitrogen of 84.3 mg / kg, available phosphorus of 38.5 mg / kg, and available potassium of 82.1 mg / kg.

[0129] 1.3) Instruments and Equipment

[0130] 3WP-2000 mobile spray tower (Nanjing Agricultural Machinery Research Institute, Ministry of Agriculture and Rural Affairs); GA0 electronic balance (Germany); ZDR2000 intelligent data logger (Hangzhou Zeda Instrument Co., Ltd.); SPX intelligent biochemical incubator (Ningbo Jiangnan Instrument Factory).

[0131] 2) Experimental Design

[0132] 2.1) Reagents

[0133] 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.

[0134] 2.2) Test Treatment

[0135] 2.2.1) Dosage setting

[0136] When determining the ratio or content of active ingredient A and active ingredient B, the characteristics of the two agents and their toxicity 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.

[0137] 2.2.2) Experimental repetition

[0138] Each treatment was repeated 4 times, with 3 pots per treatment. Each pot was sown with 20 weed seeds, resulting in a total of 60 plants per treatment.

[0139] 2.3) Processing method

[0140] 2.3.1) Processing time and number of times

[0141] The experiment used the same pesticide once. When the weeds reached the 1.5-2 leaf stage, thinned the seedlings to keep 10 weeds per pot, and retained 30 weeds per treatment. Then, the seedlings were cultivated until they reached the 2-3 leaf stage before further treatment.

[0142] 2.3.2) Use of instruments and methods of medication

[0143] The cultured test material was evenly placed on a 0.5m² area. 2 On the platform, use a 3WP-2000 mobile spray tower for foliar spraying, with a spray volume of 450 kg / ha and a spray pressure of 0.3 MPa. After all the pesticide solution has been sprayed, close the air valve. After 30 seconds, open the spray tower door and remove the nutrient pots. Then open the air valve and spray 50 mL of clean water to clean the spray pipes.

[0144] 3) Test methods

[0145] Pot cultivation was used. Weed cultivation is described in section 1.1), following the guidelines for indoor bioassays of pesticides (herbicides). Application methods are described in section 2.3.2), using the foliar treatment method. After treatment, the plants were transferred to a greenhouse for conventional cultivation.

[0146] 4) Data survey and statistical analysis

[0147] 4.1) Survey Methods

[0148] 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.

[0149] 4.2) Survey time and frequency

[0150] An investigation was conducted 14 days after the incident, for a total of one investigation.

[0151] 4.3) Data Statistical Analysis

[0152] 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.

[0153] Soil sealing treatment:

[0154] 1) Test conditions

[0155] 1.1) Cultivation conditions

[0156] 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%.

[0157] 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.

[0158] 1.2) Instruments and Equipment

[0159] GA10 type electronic balance with a strength of 0.01% (Germany); ZDR2000 intelligent data logger (Hangzhou Zeda Instrument Co., Ltd.); SPX type intelligent biochemical incubator (Ningbo Jiangnan Instrument Factory), pipettes, etc.

[0160] 2) Experimental Design

[0161] 2.1) Reagents

[0162] 2.1.1) Test reagents

[0163] 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.

[0164] 2.2) Test Treatment

[0165] 2.2.1) Dosage setting

[0166] 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.

[0167] 2.2.2) Experimental repetition

[0168] Each treatment was repeated 4 times, with 3 pots per treatment per session, and 30 weed seeds sown in each pot.

[0169] 3) Test methods

[0170] Before treatment, irrigate to maintain a 1-2 cm water layer. Use a pipette to take a quantitative amount of the 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.

[0171] 4) Data survey and statistical analysis

[0172] The treatment is the same as post-emergence foliar spraying, so it will not be described in detail again.

[0173] The statistical results are shown in Table 1-34 below. Except for those clearly marked "soil treatment", all others are "post-emergence foliar spray treatment".

[0174] Table 1. Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with pretilachlor against *Gnaphalium affine* (soil treatment)

[0175]

[0176] Table 2. Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with bensulfuron-methyl against Cyperus rotundus (soil treatment)

[0177]

[0178] Table 3. Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with sedge against water sedge (soil treatment)

[0179]

[0180] Table 4. Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with tetrazolium oxychloride against Cyperus rotundus (soil treatment)

[0181]

[0182] Table 5. Evaluation of the actual control efficacy and combined effect of tetraflufenican and fenoxasulfone against jointed barnyardgrass (soil treatment)

[0183]

[0184] Table 6 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with sulfonium pyrazosulfuron against *Gnaphalium affine* (soil treatment)

[0185]

[0186] Table 7. Evaluation of the actual control efficacy and combined effect of tetraflufenican and acetochlor against jointed barnyardgrass (soil treatment)

[0187]

[0188]

[0189] Table 8. Evaluation of the actual control efficacy and combined effect of tetraflufenican and oxadiazon against *Gnaphalium affine* (soil treatment).

[0190]

[0191] Table 9. Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with propyne oxadiazon against water bamboo leaves (soil treatment)

[0192]

[0193] Table 10 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with cyclooxam against *Gnaphalium affine* (soil treatment)

[0194]

[0195] Table 11 Evaluation of the actual control efficacy and combined effect of tetraflufenican and ethoxyflufenican against water bamboo (soil treatment)

[0196]

[0197] Table 12 Evaluation of the actual control efficacy and combined effects of tetraflufenican and nicosulfuron against *Lysimachia nummularia*.

[0198]

[0199]

[0200] Table 13 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with dicyclosulfuron against water bamboo leaves (soil treatment)

[0201]

[0202] Table 14 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with furazolidone against water bamboo leaves (soil treatment)

[0203]

[0204] Table 15 Evaluation of the actual control efficacy and combined effect of tetraflufenotrione and fenquinotrione against water bamboo (soil treatment)

[0205]

[0206] Table 16 Evaluation of the actual control efficacy and combined effect of tetraflufenican and bensulfuron-methyl against water bamboo (soil treatment)

[0207]

[0208] Table 17 Evaluation of the actual control efficacy and combined effect of tetraflufenican and penflusulfonium against water bamboo leaf.

[0209]

[0210] Table 18 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with flufenoxuron against water bamboo (soil treatment)

[0211]

[0212] Table 19 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with pyriflusulfonamide against water bamboo (soil treatment)

[0213]

[0214] Table 20 Evaluation of the actual control efficacy and combined effects of tetraflufenican mixed with pyrimisulfuron against water bamboo leaves (soil treatment)

[0215]

[0216] Table 21 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with pyrimisulfuron against water bamboo leaves (soil treatment)

[0217]

[0218] Table 22 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with ethoxysulfuron against Cyperus rotundus (soil treatment)

[0219]

[0220] Table 23 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with oxadiazon against water bamboo leaves.

[0221]

[0222]

[0223] Table 24 Evaluation of the actual control efficacy and combined effects of tetraflufenican and benpropazine against water bamboo leaves.

[0224]

[0225] Table 25 Evaluation of the actual control efficacy and combined effect of tetraflufenican and pendimethalin against water bamboo (soil treatment)

[0226]

[0227] Table 26 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with terbufotazone against water bamboo (soil treatment)

[0228]

[0229] Table 27 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with oxadiazon against water bamboo leaves (soil treatment)

[0230]

[0231] Table 28 Evaluation of the actual control efficacy and combined effects of tetraflufenican and sodium MCPA against *Phyllostachys edulis*.

[0232]

[0233]

[0234] Table 29 Evaluation of the actual control efficacy and combined effect of tetraflufenican and fluchloropyridin against *Lysimachia nummularia*.

[0235]

[0236] Table 30 Evaluation of the actual control efficacy and combined effect of tetraflufenican combined with quinclorac on water bamboo leaves.

[0237]

[0238] Table 31 Evaluation of the actual control efficacy and combined effect of tetraflufenican mixed with quinclorac against water bamboo leaf.

[0239]

[0240] Table 32 Evaluation of the actual control efficacy and combined effect of tetraflufenican and betazon against water bamboo leaf.

[0241]

[0242] Table 33 Evaluation of the actual control efficacy and combined effect of tetraflufenican and glyphosate against *Scirpus spp.*

[0243]

[0244] Table 34 Evaluation of the actual control efficacy and combined effect of tetraflufenican and glufosinate against flat-stemmed purslane.

[0245]

[0246] C) Field Demonstration

[0247] The herbicidal compositions prepared in Examples 1-34 above were used to conduct field weed control experiments. The main weeds occurring in the field included: barnyard grass, Echinochloa crus-galli, Sedge, Jointed Weed, Water Bamboo Leaf, Water Cyperus, and Flat-stemmed Curcuma.

[0248] Test method:

[0249] Foliar treatment (F): When the weeds are at the 2-3 leaf stage, use a manual sprayer, diluted with 15 kg of water per 667 m². 2 Use a foliar sprayer to spray evenly.

[0250] Soil treatment (S): Before weeds germinate, use a manual sprayer, diluted with 15 kg of water per 667 m². 2 Soil surface spraying is employed.

[0251] The specific experimental agents and dosages are detailed in Table 35. The plot area was 50 square meters, and each treatment was repeated three times. The control effect was investigated 45 days after application, and is shown in Table 35.

[0252]

[0253] Table 35 shows the field demonstration effects of the compound compositions described in the table.

[0254]

[0255]

[0256] 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 comprising tetraflufenican, characterized in that, The herbicidal composition includes active ingredient A and active ingredient B in an effective amount for weed control, wherein active ingredient A is tetraflufenican and active ingredient B is pretilachlor, and the weight ratio of A to B in the herbicidal composition is 1:15 to 1:5 or 1:2 to 1:

1.

2. The herbicidal composition comprising tetraflufenican according to claim 1, characterized in that, The weight ratio of A to B in the herbicidal composition is 1:10 to 1:

5.

3. The herbicidal composition comprising tetraflufenican according to claim 1, characterized in that, The weight ratio of A to B in the herbicidal composition is 2:15 to 1:

5.

4. A herbicidal composition comprising tetraflufenican according to any one of claims 1 to 3, characterized in that, The herbicidal composition contains A and B in a mass percentage of 1-95% of the total.

5. The herbicidal composition comprising tetraflufenican according to claim 4, characterized in that, The herbicidal composition contains A and B in a mass percentage of 1-80% of the total.

6. A herbicidal composition comprising tetraflufenican according to any one of claims 1 to 3, characterized in that, The herbicidal composition also includes conventional adjuvants.

7. The herbicidal composition comprising tetraflufenican according to claim 6, characterized in that, The conventional additives include carriers and / or surfactants.

8. A herbicidal composition comprising tetraflufenican according to any one of claims 1 to 3, characterized in that, The herbicidal composition further includes at least one safener.

9. A herbicidal composition comprising tetraflufenican according to claim 8, characterized in that, The safener is selected from one or more of the following: bis(oxazolyl) acid, cyprosulfamide, pyrazole herbicides, quinoline, gibberellic acid, furilazole, and metcamifen.

10. A herbicidal composition comprising tetraflufenican according to any one of claims 1 to 3, characterized in that, The specific formulation of the herbicidal composition is a dispersible oil suspension, an aqueous suspension, a suspension emulsion, a wettable powder, an emulsifiable concentrate, a water-dispersible granule, an emulsion, or a microemulsion.

11. The use of the herbicidal composition comprising tetraflufenican as described in any one of claims 1 to 10 for the control of weeds.

12. A method for controlling unwanted plant growth, comprising applying a herbicidal composition comprising tetraflufenican as described in any one of claims 1 to 10 to plants or areas where plants are growing.

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