A herbicidal composition

Abstract

The present invention relates to a herbicidal composition, the composition comprising an active component (A) fluazifop-butyl and an active component (B) one or more of oxazithromycin, oxadiazine, cypermethrin, triazolam, simet-butyl, cypermethrin, mefenacet, tetrazolam, bispyribac, bicyclonil, oxazolidinone, and pyrazosulfuron-methyl, the weight ratio of the active component (A) to the active component (B) being 100:1-1:100. The present invention also relates to the use of the herbicidal composition in controlling the germination or growth of weeds in useful plants; the useful plants are selected from wheat, barley, rye, triticale, oats, corn, rice, soybean, peanut, oilseed rape, corolla, potato, sugar beet, sugarcane, cotton, flax, sorghum, forage, and lawn; and the composition is particularly suitable for controlling the germination or growth of weeds in rice crops.

Description

[0001] This application is a divisional application for the patent number "202210015128X" applied by the applicant on December 4, 2019, and the patent name is "A Herbicidal Composition". Technical Field

[0002] The invention discloses a herbicidal composition, belonging to the field of crop protection; the herbicidal composition is particularly suitable for preventing and controlling weeds in soybean, corn, peanut, cotton, sugarcane, potato and rice fields. Background Art

[0003] Long-term use of herbicides results in changes in the sensitivity of weeds to herbicides. Improving the control of tolerant or resistant weed species by increasing the application rate of herbicides is often unsatisfactory. Increasing the application rate of herbicides may reduce the selectivity of the herbicide or may not improve the weed control effect even at higher application rates.

[0004] Therefore, in weed control, herbicides are needed that have better overall selectivity for weeds; achieve equal or better control at fewer application rates; reduce the release of active compounds into the environment to avoid, for example, leaching and residual effects; and combine rapid action with long-lasting action to avoid multiple applications.

[0005] Flumioxazin is described in EP170191C and has the structural formula I. Flumioxazin is not satisfactory in all respects with regard to its herbicidal properties.

[0006] Summary of the invention

[0007] The object of the present invention is to provide a herbicidal composition in view of the above-mentioned deficiencies, solving at least one of the problems such as improving biological properties, providing synergistic properties, reducing dosage rates, expanding the herbicidal spectrum, combining rapid action and long-term action, and resistance management to delay resistance.

[0008] The invention provides a herbicidal composition, comprising an active component (A) fluazifop-butyl and an active component (B) one or more of oxazithromycin, oxadiazine, cypermethrin, triazone, simet-butyl, fenacet, mefenacet, tetramethoate, bispyribac, bifenazuril, and pyrazosulfuron-methyl, wherein the weight ratio of the active component (A) to the active component (B) is 100:1-1:100.

[0009] The active component (B) is selected from oxazithromycin; the weight ratio of fluazifop-butyl to oxazithromycin is 50:1-1:50; preferably 25:1-1:25; more preferably 10:1-1:10; more preferably 5:1-1:5.

[0010] The active component (B) is selected from oxadiazine; the weight ratio of fluazifop-butyl to oxadiazine is 10:1-1:50; preferably 5:1-1:50; more preferably 5:1-1:30; more preferably 5:1-1:25, more preferably 5:1-1:15.

[0011] The active component (B) is selected from oxadiazine; the weight ratio of fluazifop-butyl to oxadiazine is 10:1-1:50; preferably 5:1-1:50; more preferably 5:1-1:50; more preferably 5:1-1:25.

[0012] The active component (B) is selected from triazolam; the weight ratio of fluazifop-butyl to triazolam is 5:1-1:50; preferably 5:1-1:25; more preferably 5:1-1:10.

[0013] The active component (B) is selected from simetryn; the weight ratio of fluazifop-propyl to simetryn is 1:1-1:100; preferably 1:5-1:50; more preferably 1:5-1:30; more preferably 1:5-1:20.

[0014] The active component (B) is selected from cypermethrin; the weight ratio of fluazifop-butyl to cypermethrin is 1:1-1:100; preferably 1:5-1:100; more preferably 1:10-1:80; more preferably 1:10-1:60; more preferably 1:10-1:50.

[0015] The active component (B) is selected from mefenacet; the weight ratio of fluazifop-butyl to mefenacet is 1:1-1:100; preferably 1:5-1:100; more preferably 1:10-1:80; more preferably 1:10-1:50, more preferably 1:10-1:35.

[0016] The active component (B) is selected from tetrazopyralid; the weight ratio of fluazifop-butyl to tetrazopyralid is 1:1-1:50; preferably 1:5-1:40; more preferably 1:5-1:30; more preferably 1:5-1:25.

[0017] The active component (B) is selected from bispyribac; the weight ratio of fluazifop-butyl to bispyribac is 1:1-1:100; preferably 1:1-1:50; more preferably 1:1-1:30.

[0018] The active component (B) is selected from bicyclon; the weight ratio of fluazifop-butyl to bicyclon is 1:1-1:80; preferably 1:5-1:50; more preferably 1:5-1:30; more preferably 1:5-1:20.

[0019] The active component (B) is selected from azoxystrobin; the weight ratio of fluazifop-butyl to azoxystrobin is 20:1-1:20; preferably 10:1-1:10; more preferably 5:1-1:10; more preferably 5:1-1:5.

[0020] The present invention unexpectedly discovered that fluazifop-butyl and oxazithromycin, oxadiazine, cypermethrin, triazone, simethoprim, cypermethrin, mefenacet, tetramethoate, bispyribac, bifenazuril, bicyclon, and pyrasulfuron-methyl work together in a particularly advantageous manner.

[0021] The simultaneous application of active ingredients (A) and (B) or the sequential application of active ingredients (A) and (B) results in an enhanced weed control effect compared to the control rate possible with each individual compound, and this unexpected effect is a true synergistic effect rather than a mere addition of activity.

[0022] Therefore, the herbicidal composition of the present invention significantly reduces the application concentration of each single compound and has a longer effective control time on weeds.

[0023] First, in the herbicidal composition of the present invention, the application rate of a single compound is reduced while maintaining a good level of action; second, when a single compound becomes ineffective from an agronomic perspective within a low application rate range, the herbicidal composition of the present invention achieves a high level of weed control.

[0024] The herbicidal composition of the present invention significantly broadens the control spectrum of the compounds against weeds. The combination of the present invention not only maintains excellent control of weeds in useful plants, but also allows greater flexibility in subsequent crops.

[0025] The herbicidal composition of the present invention shows effective weed control effects on both dryland weeds and paddy field weeds. Therefore, the herbicidal composition can be used for weed control in useful plants such as wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice crops or plantations such as citrus orchards and vineyards.

[0026] Therefore, the present invention provides the use of the herbicidal composition for controlling the germination or growth of weeds in useful plants; the useful plants are selected from wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice crops, citrus, and grapes.

[0027] Particularly preferred useful plants of the present invention are corn, soybean, peanut, sugar cane, cotton, and rice; rice crops are particularly preferred.

[0028] The herbicidal compositions of the present invention can be used to control a large number of agronomically important weeds, such as:

[0029] Grass weeds of the family Poaceae, for example Alopecurus species, Poa species, Apera species, Avena spp., Lolium species, Bromus species, Echinochloa spp., Leptochloa spp., Digitaria spp., Setaria spp., Brachiaria spp. and Ischeamum spp.;

[0030] Broadleaf weeds, such as Gallium spp., Lamium spp., Geranium spp., Solanum spp., Veronica spp., Viola spp. (e.g., Viola tricolor), Alchemilla spp., Kochia spp., Stellaria spp., Polygonum spp., Matricaria spp., Chenopodium spp., Amaranthus spp., Galinsoga spp., Monochoria spp., Lindernia spp., Anthemis spp., Sinapis spp. spp.), Raphanus spp., Papaver spp., Capsella spp., Rotala spp., Butomus spp., Limnocharis spp., Sphenoclea spp., Commelina spp., Ludwigia spp., Bidens pilosa, Elatine spp.; the combination also controls annual and perennial mosses, for example, Scirpus spp. (e.g., Scirpus juncoides), Sagittaria spp., Cyperus spp., and Fimbristylis spp.

[0031] The herbicidal compositions according to the invention are particularly suitable for controlling weeds in fields of useful plants, for example:

[0032] -wheat crops-, wherein examples of weeds include Alopecurus species, Poa species, Apera species, Avena spp., Lolium species, Bromus species, Fumaria spp., Myosotis spp., Gallium spp., Geranium spp. (e.g., Geranium rotundifolium), Veronica spp., Viola spp. (e.g., Viola tricolor), Lamium spp., Stellaria spp., Polygonum spp., Aethusa cynapum, Alchemilla spp., Kochia spp., Matricaria spp., Anthemis spp., Papaver spp., Myosotis spp., Capsella spp., Chenopodium spp., and;

[0033] - Rice crops - Examples of weeds include Echinochloa spp., Leptochloa spp., Digitaria spp., Setaria spp., Brachiaria spp., and Ischeamum spp., Monochoria spp., Lindernia spp., Ludwigia spp., Elatine spp., Scirpus spp. (e.g., Scirpus juncoides), Cyperus spp., Butomus spp., Rotala spp., Commelina spp., Limnocharis spp. spp.), Sphenoclea spp., Sagittaria spp., Bidens pilosa, and Fimbristylis spp.;

[0034] - corn - wherein examples of weeds include Echinochloa spp., Digitaria spp., Setaria spp., Cyperus spp., Kochia spp., Matricaria spp., Chenopodium ppp., Solanum spp., Polygonum spp., Amaranthus spp., and; and - sugarcane - wherein examples of weeds include Echinochloa spp., Digitaria spp., Setaria spp., Brachiaria spp., Kochia spp., and Amarathus spp.

[0035] In particular, the herbicidal composition of the present invention is particularly suitable for controlling the germination or growth of undesirable weeds in rice fields:

[0036] Echinochloa crusgalli, Ammannia arenaria HBK, Cyperus difformis L., Scirpus planiculmis Schmidt, Lindernia procumbens Philcox, Cyperus rotundus L., Alismataaceae, Sagittaria trifolia, Sesbania exaltata, Commelina diffusa, Monochoria vaginalis, Equisetum ramosissimum Desf, Herba Commelinae, Mllrdannia triguetra, Heleocharis plantagineiformis Tang et Wang, Fimbristylis miliacea (L.) Vahl), Cyperus iria L., Scirpus juncoides Roxburgh, Leptochloachinensis, and Eclipta prostrata (L.) L.

[0037] The use of the herbicidal composition of the present invention is not limited to the use for controlling the above-mentioned weeds, and can also be used for controlling other weeds.

[0038] The present invention also provides a method for controlling the germination or growth of weeds, comprising: (i) before the weeds germinate; (ii) after the weeds germinate; or (iii) during (i) and (ii), applying a herbicidally effective amount of a herbicidal composition containing active components (A) and (B) to the weeds or their growth sites.

[0039] The present invention also provides a method for controlling the germination or growth of weeds, comprising contacting the weeds or their growth sites with a herbicidally effective amount of the herbicidal composition. The herbicidally effective amount refers to the amount of the herbicidal active ingredient applied to control the weeds.

[0040] The present invention also provides a method for controlling the germination or growth of weeds, wherein the herbicidal composition of the present invention is applied to soil to control the germination or growth of weeds.

[0041] A method for controlling the germination or growth of weeds, comprising applying the herbicidal composition of the present invention to weeds to control the germination or growth of the weeds.

[0042] A method for controlling unwanted germination or growth, wherein the active components (A) and (B) in the herbicidal composition of the present invention are applied jointly or separately to weeds or their growth sites to control their germination or growth.

[0043] A method for controlling weeds, wherein the active components (A) and (B) in the herbicidal composition of the present invention are applied together or separately to the soil before weeds germinate or to the leaves after weeds germinate to control the germination or growth of weeds.

[0044] The term "weeds" refers to those plants that affect the growth and quality of useful crop plants. Both grass weeds and broadleaf weeds are included.

[0045] If the herbicidal composition of the present invention is applied to the soil surface before weeds germinate, weed seedlings are completely prevented from germinating, or weeds grow to the cotyledon stage, but then they stop growing and eventually die completely after two to four weeks.

[0046] If the herbicidal composition is applied to the green parts of the weeds after they have emerged, growth is also drastically stopped within a relatively short time after the treatment, and the weed plants remain in the growth phase at the time of application, or they die completely after a certain time, in this way eliminating the competition caused by weeds that are harmful to useful plants at an early and lasting stage.

[0047] Although the active components (A) and (B) have shown good or even sufficient selectivity in a large number of crops, in principle, in some crops, in particular also in admixture with other less selective herbicides, phytotoxicity to the crop plants may occur. Therefore, compositions comprising the herbicidal composition according to the invention and one or more safeners are particularly advantageous. The safeners are used in an antidote effective amount, for example, to reduce the phytotoxic side effects of the herbicides used in economically important crops or in fruit plantations (plantation crops). For example, weed control in wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugar cane, potatoes, rice crops or plantations such as citrus orchards, vineyards.

[0048] The herbicidal composition of the present invention can be applied in a conventional manner using techniques well known to those skilled in the art. Application methods include, but are not limited to, application to weeds or their growth sites, such as application to areas adjacent to plants, and pre-emergence, post-emergence, foliage (spread, directional, band, fixed point, mechanical, top-jumping or replanting), and by hand, backpack, machinery, tractor, or aerial (aircraft, helicopter, drone) application methods.

[0049] A method for controlling weeds comprises adding the herbicidal composition of the present invention into irrigation water and applying it to the weeds or their growth sites by using a ground or aerial duster, sprayer or granulator.

[0050] The type of application depends in a known manner on the intended purposes; in any case the technique should ensure the best possible distribution of the active ingredients of the herbicidal compositions according to the invention.

[0051] The application rate can vary within a wide range and depends on soil properties, application method (pre-emergence or post-emergence, etc.), crop plants, weeds to be controlled, prevailing climatic conditions and other factors controlled by the application method, application time and target crops. The active ingredients of the herbicidal composition of the present invention can usually be applied in an amount of 1-2000 g / ha, preferably 10-100 g / ha.

[0052] The herbicidal composition of the present invention can be formulated into conventional formulation forms. Its formulation forms can be emulsifiable concentrates, water suspensions, oil suspensions, seed treatment dry powders, seed treatment suspensions, water dispersible granules, wettable powders, suspoemulsions, aerosols, coated granules, extruded granules, aqueous emulsions, microcapsule suspensions, microcapsule suspension-suspension concentrates, dry suspensions, ultra-low volume liquids, electrostatic oils, gels, granules, and microgranules.

[0053] The formulation of the present invention can be prepared by mixing the active components (A) and (B) with a liquid diluent and / or a solid diluent and, if necessary, a surfactant such as an emulsifier and / or a dispersant and / or a foaming agent.

[0054] Suitable liquid diluents include water or organic solvents, such as toluene, xylene, cyclohexane, mineral oil, vegetable oil, butanol, ethylene glycol, methyl ethyl ketone, methyl isobutyl ketone, dimethylformamide, dimethyl sulfoxide, water, and the like.

[0055] Suitable solid diluents are diatomaceous earth, magnesium aluminum silicate, activated clay, kaolin, clay, gypsum, bentonite, white carbon black, light calcium carbonate, limestone, sawdust, corn starch, soluble starch and the like.

[0056] Suitable emulsifiers may be anionic and / or nonionic emulsifiers, such as alkylphenol polyoxyethylene ethers, alkylphenol polyoxyethylene polyoxypropylene ethers, benzylphenol polyoxyethylene ethers, polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers, polyoxyethylene fatty amines, alkylphenol polyglycol ethers, and the like.

[0057] Suitable dispersants can be alkylnaphthalene sulfonates, bis(alkyl)naphthalene sulfonate formaldehyde condensates, naphthalenesulfonic acid formaldehyde condensates, alkylphenol polyoxyethylene phosphates, alkylphenol polyoxyethylene ether formaldehyde condensate sulfates, alkylphenol polyoxyethylene ether phosphates, alkylphenol polyoxyethylene ethers, castor oil ethylene oxide adducts, ethylene oxide-propylene oxide block copolymers, alkylphenol polyoxyethylene ether formaldehyde condensates, octylphenol polyoxyethylene ether sulfates and methylcellulose. For example, sodium lignin sulfonate, calcium lignin sulfonate, sodium methylnaphthalene sulfonate formaldehyde condensates, sodium naphthalene sulfonate formaldehyde condensates, sodium methylenenaphthalene sulfonate, etc.

[0058] Preferred formulations of the present invention may be in the form of wettable powders, emulsifiable concentrates, suspensions, oil suspensions, microcapsules, microemulsions, aqueous emulsions, suspoemulsions, water dispersible granules, microcapsule suspensions-suspensions, and ultra-low volume liquids.

[0059] For water dispersible granules, those skilled in the art are familiar with the use of corresponding adjuvants to complete the present invention. Dispersants are selected from polycarboxylates, lignin sulfonates, alkyl naphthalene sulfonates, alkylphenol polyoxyethylene ethers, ethylene oxide / propylene oxide block polyethers; wetting agents are selected from alkyl sulfates, alkyl sulfonates, naphthalene sulfonates, sodium lignin sulfonates, fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers; disintegrants are selected from ammonium sulfate, sodium sulfate, sodium chloride, ammonium chloride, urea, sucrose, glucose, carboxymethyl cellulose, soluble starch, polyvinyl pyrrolidone; binders are selected from polyvinyl alcohol, soluble starch, dextrin, xanthan gum, carboxymethyl (ethyl) cellulose; fillers are selected from diatomaceous earth, kaolin, white carbon black, light calcium carbonate, talc, attapulgite, and pottery clay.

[0060] For wettable powders, the adjuvants that can be used are: dispersants selected from polycarboxylates, lignin sulfonates, and alkyl naphthalene sulfonates; wetting agents selected from alkyl sulfates, alkyl sulfonates, and naphthalene sulfonates; fillers selected from ammonium sulfate, urea, sucrose, glucose, diatomaceous earth, kaolin, white carbon black, light calcium carbonate, talc, attapulgite, and pottery clay.

[0061] For the suspending agent, the auxiliary agents that can be used are: dispersants selected from polycarboxylates, lignin sulfonates, and alkylnaphthalene sulfonates; emulsifiers selected from alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan monostearate), anhydrous sorbitan monostearate polyoxyethylene ether, phenethylphenol polyoxyethylene polyoxypropylene ether; wetting agents selected from alkylphenol polyoxyethylene ether formaldehyde condensation sulfates, alkylphenol polyoxyethylene ether phosphates, phenethylphenol polyoxyethylene ether phosphates, alkyl sulfates, alkyl sulfonates, and naphthalene sulfonates; thickeners selected from xanthan gum, polyvinyl alcohol, bentonite, and magnesium aluminum silicate; preservatives selected from formaldehyde, benzoic acid, and sodium benzoate; defoamers are silicone defoamers; antifreeze agents selected from ethylene glycol, propylene glycol, glycerol, urea, and inorganic salts (such as sodium chloride).

[0062] For dispersible oil suspensions, the following additives can be used: dispersants are selected from polycarboxylates, lignin sulfonates, alkyl naphthalene sulfonates, castor oil polyoxyethylene ethers, alkylphenol formaldehyde resin polyoxyethylene ethers, sorbitan monostearate, sorbitan monostearate polyoxyethylene ethers, and phenethylphenol polyoxyethylene polyoxypropylene ethers; wetting agents are selected from alkylphenol polyoxyethylene ether formaldehyde condensate sulfates, alkylphenol polyoxyethylene ether phosphates, phenethylphenol polyoxyethylene ether phosphates, alkyl sulfates, alkyl sulfonates, and naphthalene sulfonates; thickeners are selected from white carbon black, polyvinyl alcohol, bentonite, and magnesium aluminum silicate; antifreeze agents are selected from ethylene glycol, propylene glycol, glycerol, urea, and inorganic salts (such as sodium chloride); stabilizers are selected from epoxy soybean oil, epichlorohydrin, and triphenyl phosphate; and dispersion media are selected from soybean oil, rapeseed oil, corn oil, methyl oleate, diesel, engine oil, and mineral oil.

[0063] The formulation of the present invention contains active components (A) and (B), and the weight of the active components (A) and (B) together accounts for 1%-90% by weight of the herbicidal composition, preferably 5%-80%, more preferably 5%-70%, and even more preferably 10%-60%.

[0064] If appropriate, the herbicidal composition of the present invention may also contain other added components, such as protective colloids, binders, adhesives, thickeners, antifreeze agents, defoamers, thixotropic agents, penetrants, stabilizers, sequestrants, multivalent sequestrants, complex formers. Generally, the active ingredient can be combined with any solid or liquid additive conventionally used for formulation purposes.

[0065] Suitable thickeners are polysaccharides (eg xanthan gum, carboxymethylcellulose), inorganic clays (organically modified or unmodified), polycarboxylates and silicates.

[0066] Suitable antifreeze agents are ethylene glycol, propylene glycol, urea and glycerol.

[0067] Suitable defoamers are silicones, long-chain alcohols and fatty acid salts.

[0068] Suitable binders are polyvinyl pyrrolidone, polyvinyl acetate, polyvinyl alcohol, polyacrylates and cellulose ethers.

[0069] According to the characteristics of the formulation, the application method can be selected according to the intended target and the prevailing environment, such as foliage, drench, spray, dusting, scattering.

[0070] When used, the preparation can be in commercial form and, if necessary, diluted in a conventional manner, for example, by diluting wettable powders, emulsifiable concentrates, dispersants and water-dispersible granules with water. For dusts, granules for soil application, broadcast granules and spray solution type preparations, they are generally not diluted with other inert substances before use.

[0071] The herbicidal composition of the present invention may further comprise various active compounds as other components, for example, selected from fungicides, insecticides, miticides, nematicides, bird repellents, soil structure improvers, and plant growth regulators.

[0072] The synergistic effect of the present invention can reduce the application rate of a single herbicide, achieve higher efficacy at the same application rate, control varieties that have not yet been controlled, control varieties that are tolerant or resistant to a single herbicide or multiple herbicides, extend the application period and / or reduce the number of separate applications required; and for users, a more economically and ecologically favorable weed control system is obtained. DETAILED DESCRIPTION

[0073] Biological test cases

[0074] method:

[0075] The original drugs of fluazifop-butyl and the active ingredient (B) in the table were dissolved in acetone to prepare single-dose mother solutions, which were then diluted with an aqueous solution containing 0.1% Tween-80 to the required concentration.

[0076] The weed seeds to be tested were dry-sown in plastic pots with a diameter of 20 cm and covered with 1 cm of soil. The next day, the prepared test agent was evenly applied to the surface of the soil using a DeVries, SB6-202 walking spray tower, and a water control was set up; 3 replicates were used for each treatment. After the test material was treated, it was placed in a ventilated place to dry naturally in the shade for 2-3 hours. Do not spray the leaves of the test material within 3 days after treatment. Water was applied by infiltration irrigation and placed in a greenhouse for management. 21 days after the drug was applied, the fresh weight of the aboveground part was weighed and the fresh weight control effect was calculated respectively.

[0077] Fresh weight control effect (%) = (blank control weed fresh weight - agent-treated weed fresh weight) / blank control weed fresh weight × 100

[0078] The expected action of a particular combination of two active compounds can be estimated using the so-called "Colby formula" (see SR Colby, "Calculating Synergistic and Antagonistic Responses of Herbicide Combinations", Weeds 1967, 15, 20-22).

[0079] Colby's expected value is calculated as follows:

[0080]

[0081] X is the control effect of active ingredient (A) at a dose of mg / ha or a concentration of mppm;

[0082] Y is the control effect of active ingredient (B) at a dose of ng / ha or a concentration of nppm;

[0083] E is the expected value of active ingredient (A) and active ingredient (B) at doses of m and ng / ha or concentrations of m and nppm;

[0084] When the actual tested weed control efficacy is greater than that expected based on Colby's formula, then the mixture is superadditive, ie, synergistic.

[0085] Table 1 Control effect on barnyard grass

[0086]

[0087] Table 2 Control effect on Cyperus difformis

[0088]

[0089] Table 3 Control effect on Leptochloa chinensis

[0090]

[0091] Table 4: Effect of prevention on Channa intestine

[0092]

[0093] It can be seen from the test results that the herbicidal effect of the combination of fluazifop-butyl and the active component (B) is significantly better than that of applying fluazifop-butyl and the active component (B) alone, and has a significant benefit effect.

Claims

1. A herbicidal composition, characterized in that The composition comprises an active component (A) fluazifop-butyl and an active component (B) tetrazopyralid, wherein the weight ratio of the active component (A) to the active component (B) is 2:1-1:

25.

2. The herbicidal composition according to claim 1, characterized in that The active component (B) is selected from tetrazopyralid, and the weight ratio of fluazifop-butyl to tetrazopyralid is 1:1-1:

25.

3. The herbicidal composition according to claim 1, characterized in that The active component (B) is selected from tetrazopyralid, and the weight ratio of fluazifop-butyl to tetrazopyralid is 1:1-1:

5.

4. The herbicidal composition according to claim 1, characterized in that The herbicidal composition can be formulated into wettable powder, emulsifiable concentrate, suspension, oil suspension, microcapsule, microemulsion, water emulsion, suspension emulsion, water dispersible granule, microcapsule suspension-suspension concentrate, and ultra-low volume liquid.

5. Use of the herbicidal composition according to claim 1 for controlling the germination or growth of weeds in useful plants, wherein the useful plants are selected from wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice, citrus, and grapes; and the weeds are barnyard grass, Cyperus difformis, Leptochloa chinensis, and Channa chus.

6. Use of the herbicidal composition according to claim 1 for controlling the germination or growth of weeds in crops such as rice, soybean, corn, cotton and peanut, wherein the weeds are barnyard grass, Cyperus difformis, Leptochloa chinensis and Channa chussima.

7. A method for controlling the germination or growth of weeds, characterized in that: include: (i) before weeds germinate; (ii) after weeds germinate; or (iii) during (i) and (ii), applying a herbicidally effective amount of the herbicidal composition of claim 1 to the weeds or their growth sites, wherein the weeds are barnyard grass, Cyperus difformis, Leptochloa chinensis and Channa chussima.

8. A method for controlling the germination or growth of weeds, characterized in that: The herbicidal composition of claim 1 is applied to soil to control the germination or growth of weeds, which are barnyard grass, Cyperus difformis, Leptochloa chinensis and Channa sphaerocephala.

9. A method for controlling the germination or growth of weeds, characterized in that: The herbicidal composition of claim 1 is applied to weeds or a place where they grow to control the germination or growth of the weeds, wherein the weeds are barnyard grass, Cyperus difformis, Leptochloa chinensis and Channa chussima.

10. A method for controlling the germination or growth of weeds, characterized in that: The herbicidal composition according to claim 1 is applied to the soil before weeds germinate or to the leaves after weeds germinate to control the germination or growth of weeds, wherein the weeds are barnyard grass, Cyperus difformis, Leptochloa chinensis and Channa chussima.

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