A herbicidal composition

Abstract

The present invention relates to a herbicidal composition comprising an active component (A) fluazifop-propyl and an active component (B) selected from the group consisting of oxaziclomefone, oxadiazon, cypermethrin, triazolam, simet-pyraclostrobin, mefenacet, tetrazolam, bispyribac, oxazolidinone, and pyrazosulfuron-methyl, wherein the weight ratio of the active components (A) to (B) is 100:1-1:100. The present invention also relates to the use of the herbicidal composition for controlling the germination or growth of weeds in useful plants selected from wheat, barley, rye, triticale, oats, corn, rice, soybean, peanut, oilseed rape, corolla, potato, sugar beet, sugarcane, cotton, flax, sorghum, forage grass, and lawn; 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 herbicide use leads to changes in weed sensitivity. Improving herbicide control against tolerant or resistant weed species by increasing the herbicide application rate is often unsatisfactory. Increasing the herbicide application rate can reduce herbicide selectivity or result in no improvement in weed control even at higher application rates.

[0004] Therefore, in weed control, there is a need for herbicides with better overall selectivity for weeds; achieving equivalent or better control at lower application rates; reducing the release of active compounds into the environment to avoid, for example, leaching and residual effects; and combining rapid action with long-lasting action to avoid multiple applications.

[0005] Flumioxazin is described in EP 170 191 C 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-lasting action, and resistance management to delay resistance.

[0008] The present invention provides a herbicidal composition. The composition comprises an active component (A) fluazifop-propyl and an active component (B) one or more of oxaziclomefone, oxadiazon, cypermethrin, triazolam, simetryn, cyprodinil, mefenacet, tetramefone, bispyribac, oxazolidinone, 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 oxaziclomefone; the weight ratio of fluazifop-propyl to oxaziclomefone 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 oxadiazon; the weight ratio of fluazifop-propyl to oxadiazon is 10:1-1:50; preferably 5:1-1:50; more preferably 5:1-1:30; more preferably 5:1-1:25, and more preferably 5:1-1:15.

[0011] The active component (B) is selected from oxadiazon; the weight ratio of fluazifop-propyl to oxadiazon 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-propyl 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-propyl 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, and more preferably 1:10-1:35.

[0016] The active component (B) is selected from tetrazolam; the weight ratio of fluazifop-propyl to tetrazolam 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 bicyclazone; the weight ratio of fluazifop-propyl to bicyclazone 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 and 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 oxaziclomefone, oxadiazon, cyclopentadione, triaconamide, simetryn, cypermethrin, mefenacet, tetramefone, bispyribac, oxazolidinone, and pyrazosulfuron-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 enhanced weed control compared to the control 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 individual 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, the herbicidal composition of the present invention achieves a high level of weed control when a single compound becomes ineffective from an agroeconomic perspective within a low application rate range.

[0024] The herbicidal compositions of the present invention significantly broaden the spectrum of weed control by the compounds. The combinations of the present invention not only maintain excellent weed control in useful plants but also allow for greater flexibility in subsequent crops.

[0025] The herbicidal composition of the present invention exhibits effective weed control against both dryland weeds and paddy field weeds. Therefore, the herbicidal composition can be used to control weeds in useful plants such as wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, and rice crops, or in 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, sugarcane, 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 unwanted weeds in rice fields:

[0036] Echinochloa crusgalli, Ammannia arenaria HBK, Cyperus difformis L., Scirpus planiculmis Schmidt, Lindernia procumbens Philcox, Cyperus rotundus L., Alismata (Alismataceae), 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 control of the above-mentioned weeds, but can also be used to control 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 both (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, comprising applying the active components (A) and (B) of the herbicidal composition of the present invention jointly or separately to weeds or their growth sites to control their germination or growth.

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

[0044] The term "weeds" refers to plants that affect the growth and quality of useful crop plants, including grass weeds and broadleaf weeds.

[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 weeds after they have emerged, growth is also abruptly stopped within a relatively short time after treatment, and the weed plants remain in the growth phase at the time of application, or they die completely after a certain time, thus eliminating competition with weeds that is harmful to useful plants early and permanently.

[0047] Although the active ingredients (A) and (B) already exhibit good or even adequate selectivity in a wide range of crops, in principle, phytotoxicity to the crop plants may occur in some crops, particularly when mixed with other less selective herbicides. Therefore, compositions comprising the herbicidal compositions 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). Examples include weed control in wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, and rice crops, or in plantations such as citrus orchards and vineyards.

[0048] The herbicidal compositions 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 habitat, such as application to areas adjacent to plants, as well as pre-emergence, post-emergence, foliar application (broadcast, directed, banded, fixed-point, mechanical, top-jumping, or replanting), and application by hand, backpack, machine, tractor, or aerial application (airplane, helicopter, drone).

[0049] A method for controlling weeds comprises adding the herbicidal composition of the present invention into irrigation water and applying the composition 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 widely and depends on the soil properties, the method of application (pre-emergence or post-emergence, etc.), the crop plant, the weeds to be controlled, the prevailing climatic conditions and other factors controlled by the application method, the time of application, and the target crop. The active ingredient of the herbicidal composition of the present invention can generally be applied in an amount of 1 to 2000 g / ha, preferably 10 to 100 g / ha.

[0052] The herbicidal composition of the present invention can be formulated into conventional formulations. The formulations may be emulsifiable concentrates, aqueous suspensions, oil suspensions, dry powders for seed treatment, suspensions for seed treatment, 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 formulations 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 include 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. Examples include sodium lignin sulfonate, calcium lignin sulfonate, sodium methylnaphthalene sulfonate formaldehyde condensates, sodium naphthalene sulfonate formaldehyde condensates, and sodium methylenenaphthalene sulfonate.

[0058] Preferred formulations of the present invention may be in the form of wettable powders, emulsifiable concentrates, suspension concentrates, oil suspension concentrates, microcapsules, microemulsions, aqueous emulsions, suspoemulsions, water-dispersible granules, microcapsule suspension-suspension concentrates, 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, alkylnaphthalene sulfonates, alkylphenol polyoxyethylene ethers, and ethylene oxide / propylene oxide block polyethers; wetting agents are selected from alkyl sulfates, alkyl sulfonates, naphthalene sulfonates, sodium lignin sulfonates, fatty alcohol polyoxyethylene ethers, and alkylphenol polyoxyethylene ethers; disintegrants are selected from ammonium sulfate, sodium sulfate, sodium chloride, ammonium chloride, urea, sucrose, glucose, carboxymethyl cellulose, soluble starch, and polyvinyl pyrrolidone; binders are selected from polyvinyl alcohol, soluble starch, dextrin, xanthan gum, and carboxymethyl (ethyl) cellulose; and 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 include: dispersants selected from polycarboxylates, lignin sulfonates, and alkylnaphthalene sulfonates; wetting agents selected from alkyl sulfates, alkyl sulfonates, and naphthalene sulfonates; and 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, and phenethylphenol polyoxyethylene polyoxypropylene ether; wetting agents selected from alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, 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; and antifreeze agents selected from ethylene glycol, propylene glycol, glycerol, urea, and inorganic salts (such as sodium chloride).

[0062] For dispersible oil suspension concentrates, the following additives can be used: dispersants are selected from polycarboxylates, lignin sulfonates, alkylnaphthalene sulfonates, castor oil polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan monostearate, anhydrous sorbitan monostearate polyoxyethylene ether, phenylethylphenol polyoxyethylene polyoxypropylene ether; wetting agents are selected from alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenylethylphenol polyoxyethylene ether phosphate, alkyl sulfates, alkyl sulfonates, naphthalene sulfonates; thickeners are selected from white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate; antifreeze agents are selected from ethylene glycol, propylene glycol, glycerol, urea, inorganic salts (such as sodium chloride); stabilizers are selected from epoxy soybean oil, epichlorohydrin, 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% to 90% by weight of the herbicidal composition, preferably 5% to 80%, more preferably 5% to 70%, and even more preferably 10% to 60%.

[0064] If appropriate, the herbicidal compositions according to the invention may also contain other added components, such as protective colloids, binders, adhesives, thickeners, antifreeze agents, defoamers, thixotropic agents, penetrants, stabilizers, sequestrants, sequestrants, complex formers. In general, the active ingredients may be combined with any solid or liquid additives 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, and scattering.

[0070] For application, the formulations may 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. In the case of dusts, granules for soil application, granules for broadcasting and spray solutions, these 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, acaricides, 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-propyl 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] Weed seeds to be tested were dry-sown in 20 cm diameter plastic pots and covered with 1 cm of soil. The next day, the prepared test agent was evenly applied to the soil surface using a DeVries SB6-202 mobile spray tower. A water control was provided. Three replicates were used for each treatment. After treatment, the test materials were placed in a well-ventilated area to air dry for 2-3 hours. Do not spray the leaves for 3 days after treatment. Water the test materials using subsurface irrigation and maintain them in a greenhouse. Twenty-one days after application, the fresh weight of the aboveground parts was measured and the control efficacy was calculated.

[0077] Fresh weight control effect (%) = (fresh weight of blank control weeds - fresh weight of weeds treated with pesticides) / fresh weight of blank control weeds × 100

[0078] The expected effect of a specific combination of two active compounds can be calculated 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 efficacy of the 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 predicted 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 diversiformis

[0088]

[0089] Table 3 Control effect on Leptochloa chinensis

[0090]

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

[0092]

[0093] The test results show that the herbicidal effect of the combination of fluazifop-butyl and active component (B) is significantly better than that of applying fluazifop-butyl and 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-propyl and an active component (B) selected from pyrazosulfuron-methyl, and the weight ratio of the active component (A) to the active component (B) is 10:1-1:

10.

2. The herbicidal composition according to claim 1, characterized in that The active component (B) is selected from azoxystrobin pyrazosulfuron-methyl, and the weight ratio of fluazifop-butyl to azoxystrobin pyrazosulfuron-methyl is 5:1-1:

10.

3. The herbicidal composition according to claim 1, wherein The active component (B) is selected from azoxystrobin, and the weight ratio of fluazifop-butyl to azoxystrobin is 5:1-1:

5.

4. The herbicidal composition according to claim 1, characterized in that The herbicidal composition can be formulated into wettable powder, emulsifiable concentrate, suspension concentrate, oil suspension concentrate, 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, Leptochloa chinensis, and Echinops chub.

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; the weeds are barnyard grass, Leptochloa chinensis, and Echinops chub.

7. A method for controlling the germination or growth of weeds, characterized in that: include: (i) before the weeds germinate; (ii) after the 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; the weeds are barnyard grass, Leptochloa chinensis, and Echinops chub.

8. A method for controlling the germination or growth of weeds, characterized in that: The herbicidal composition according to claim 1 is applied to soil to control the germination or growth of weeds; the weeds are barnyard grass, loblolly nut, and snakehead.

9. A method for controlling the germination or growth of weeds, characterized in that: The herbicidal composition according to claim 1 is applied to weeds or their growing sites to control the germination or growth of the weeds; the weeds are barnyard grass, loblolly nut, and snakehead.

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; the weeds are barnyard grass, loblolly twig chinensis, and snakehead antler.

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