CN111226948A - Herbicidal composition and use thereof - Google Patents
Herbicidal composition and use thereof Download PDFInfo
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- CN111226948A CN111226948A CN201811443623.0A CN201811443623A CN111226948A CN 111226948 A CN111226948 A CN 111226948A CN 201811443623 A CN201811443623 A CN 201811443623A CN 111226948 A CN111226948 A CN 111226948A
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- herbicidal composition
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- metribuzin
- florasulam
- pyraflufen
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
- A01N43/707—1,2,3- or 1,2,4-triazines; Hydrogenated 1,2,3- or 1,2,4-triazines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
Abstract
The invention discloses a weeding composition and application thereof. The weeding composition comprises an active ingredient A and an active ingredient B. The active ingredient A is metribuzin, and the active ingredient B is florasulam. The weight ratio of the active component A to the active component B is (1-40) to (0.1-20). The weeding composition can be used for preventing and removing broadleaf weeds in wheat, transplanted rice or sugarcane fields. The synergistic effect of the active ingredients improves the control efficiency of the broadleaf weeds, enlarges the weed control spectrum and reduces the dosage of the herbicide.
Description
Technical Field
The invention relates to a weeding composition, in particular to a weeding composition with active ingredients comprising metribuzin and florasulam, and application thereof in weed control.
Background
Metribuzin (4-amino-6- (1, 1-dimethylethyl) -3-methylsulfanyl-1, 2, 4-triazin-5-one) having the formula: c8H14N4An OS; molecular weight: 214.29, respectively; the structural formula is as follows:
metribuzin is a protoporphyrinogen oxidase inhibitor, is a systemic selective herbicide, is mainly absorbed by roots, and has good control effect on annual broadleaf weeds and part of gramineous weeds in crop fields such as soybean, potato, sugarcane and the like. However, the pesticide effect is greatly influenced by factors such as soil organic matter content, humidity, temperature and the like, and the phenomenon of ineffectiveness or pesticide damage can occur due to improper use.
Florasulam (florasulam, 2',6' -difluoro-5-methoxy-8-fluoro [1,2,4 ]]Triazole [1,5-c ]]Pyrimidine-2-sulfonanilide), the molecular formula is: c12H8F3N5O3S, molecular weight: 359.3, respectively; the structural formula is as follows:
the florasulam is an acetolactate synthase inhibitor, is a systemic conduction type broad-spectrum herbicide and is used for preventing and killing broadleaf weeds in soybean and wheat crop fields.
Pyraflufen-ethyl (Pyraflufen-ethyl, 2-chloro-5- (4-chloro-5-difluoromethoxy-1-methyl-1H-pyrazol-3-yl) -4-fluorophenoxyacetic acid ethyl ester) with a molecular formula as follows: c15H13Cl2F3N2O4Molecular weight: 413.2; the structural formula is as follows:
pyraflufen-ethyl is a protoporphyrinogen oxidase inhibitor, is a contact herbicide, is mainly used for preventing and removing various broad-leaved weeds in wheat fields, and has high selectivity on cereal crops.
However, when metribuzin, florasulam or pyraflufen-ethyl are used alone, the weed control spectrum is limited, the single-agent use is greatly influenced by environmental conditions, the weed control spectrum is narrow, the drug resistance is easily caused by long-term use, the dosage is increased, the control effect is lowered, the drug cost is increased, and the environmental toxicity is increased.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a herbicidal composition, which uses metribuzin, florasulam and optionally pyraflufen-ethyl as active ingredients to reduce the dosage of each active ingredient and improve the control efficiency of broadleaf weeds, especially improve the control efficiency under low-biomass and low-temperature conditions, thereby expanding the herbicidal spectrum and reducing the dosage.
According to one aspect, the invention provides a weeding composition, which comprises an active ingredient A and an active ingredient B, wherein the active ingredient A is metribuzin, the active ingredient B is florasulam, and the weight ratio of the active ingredient A to the active ingredient B is (1-40): 0.1-20.
Preferably, the weeding composition further comprises an active ingredient pyraflufen-ethyl, and the weight ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-40): (0.1-20): (0.1-20).
Based on the total weight of the weeding composition, the total weight percentage of the active ingredients is 10-50%.
The dosage form of the weeding composition is selected from dispersible oil suspending agent, water suspending agent, wettable powder, granules and microcapsule suspending agent.
Preferably, the formulation of the herbicidal composition is a dispersible oil suspension, or microcapsule suspension, and metribuzin is in a microcapsule state and florasulam and pyraflufen-ethyl are in a suspended state.
According to a specific embodiment, the effective dosage of the weeding composition is 50-700 g (a.i.)/hm2。
According to another embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl and 2-25% of surface active substances.
According to a specific embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl, 2-25% of surface active substances, 1-5% of thickening agents and 5-40% of solvents.
According to another embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl, 2-25% of surface active substances, 1-10% of disintegrating agents and 5-60% of fillers.
According to another aspect of the present invention, the present invention also provides the use of said herbicidal composition for controlling weeds, preferably broadleaf weeds in wheat fields.
According to the weeding composition, the components contain the combination of metribuzin, florasulam and optional pyraflufen-ethyl in a specific ratio, and the complementation of herbicide controlling spectra is realized by compounding the active ingredients, so that the control efficiency of the compound weeding composition on annual broadleaf weeds is further improved, and particularly the selectivity of the compound weeding composition on the broadleaf weeds in wheat fields is improved. Meanwhile, the compounding of the active ingredients also improves the application conditions of the reagent, improves the low-temperature control effect of the reagent and the control effect in soil with biomass less than 2%.
Therefore, compared with metribuzin, florasulam and pyraflufen-ethyl which are used independently, the weeding composition has more remarkable synergistic effect. In particular, the herbicidal compositions according to the invention are particularly suitable for controlling annual broadleaf weeds, such as cleavers, chickweeds, capsella bursa-pastoris, descurainia sophia, speedwell and the like.
Detailed Description
The weeding composition comprises an active ingredient A and an active ingredient B, wherein the active ingredient A is metribuzin, and the active ingredient B is florasulam. Wherein the weight ratio of the active component A to the active component B can be (1-40) to (0.1-20).
Preferably, the weeding composition further comprises an active ingredient C, and the active ingredient C is pyraflufen-ethyl.
Wherein, the weight ratio of the active component A, the active component B and the active component C can be (1 to 40): 0.1 to 20), preferably (5 to 40): 1 to 10), more preferably (10 to 35): 1 to 8, most preferably (10 to 25): 3 to 5, for example, can be 5:1:1, or 10:3:3, or 15:5: 1.
The sum of the weight percentages of the active ingredients is 10 to 50%, preferably 15 to 45%, more preferably 20 to 40%, for example 30%, based on the total weight of the herbicidal composition.
The effective amount of the herbicidal composition is 50 to 700g (a.i.)/ha, preferably 70 to 550g (a.i.)/ha, 85 to 400g (a.i.)/ha, more preferably 85 to 300g (a.i.)/ha, further preferably 85 to 200g (a.i.)/ha, for example 90g (a.i.)/ha, 100g (a.i.)/ha, 150g (a.i.)/ha.
According to a specific embodiment, the above herbicidal composition further comprises a surface active substance. The surface active substance may be, for example, one or more selected from the group consisting of alkylnaphthalenesulfonates, polyoxyethylene alkylether sulfates, ligninsulfonates, fatty alcohol sulfates, fatty alcohol polyoxyethylene ethers, alkylphenol ethoxylates, sorbitan monofatty acid glycerides, PO-EO block polyethers, castor oil polyoxyethylene ethers, polycarboxylates, styrylphenol polyoxyethylene ethers, alkylbetaines, alkylamide betaines, sodium lauryl sulfate, sodium dodecylbenzenesulfonates and sodium lauryl sulfate.
Specifically, the above herbicidal composition may comprise, based on the total weight of the herbicidal composition: 5-40% (preferably 5-30%, more preferably 10-25%, for example 15%) of metribuzin, 1-10% (preferably 2-8%, more preferably 5%) of florasulam, 1-10% (preferably 2-8%, more preferably 5%) of pyraflufen-ethyl, and 2-25% (preferably 5-20%, more preferably 5-15%, for example 10%) of surface active substances.
Preferably, the surfactant may be one or more of an anionic surfactant and an amphoteric surfactant, for example, a combination of an alkylbenzene sulfonate and an alkylamide betaine in a weight ratio of 5:1 to 1:10 (e.g., 3:1 to 1:8, preferably 2:1, or 1:5), or a combination of a lignosulfonate and an alkylphenol ethoxylate in a weight ratio of 5:1 to 1:3 (e.g., 2:1 to 1:2, preferably 1: 1).
The alkyl group in the above-mentioned alkylbenzene sulfonate, alkylamide betaine and alkylphenol ethoxylate may be, for example, a dodecyl group.
Preferably, based on the total weight of the weeding composition, 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl and 2-25% of surface active substances.
Optionally, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl, 2-25% of surface active substances, 1-5% of thickening agents and 5-40% of solvents.
Optionally, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl, 2-25% of surface active substances, 1-10% of disintegrating agents and 5-60% of fillers.
The disintegrant may be one or more of bentonite, ammonium sulfate, and aluminum chloride.
The filler can be one or more of diatomite, kaolin, light calcium carbonate and white carbon black.
The thickener can be one or more selected from hydroxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, and polyvinyl alcohol.
Preferably, the solvent may be selected from water, ethanol, methanol, N-dimethylformamide, dimethyl sulfoxide, cyclohexanone, N-methylpyrrolidone, and oily base.
The oily matrix is selected from methyl oleate and vegetable oil.
Furthermore, the weeding composition can also comprise one or more auxiliary agents of an emulsifier, an antifreeze, a dispersant, a binder, a stabilizer, a safener and a synergist.
The dosage form of the weeding composition is selected from dispersible oil suspending agent, water suspending agent, wettable powder, granules and microcapsule suspension-suspending agent.
When the formulation of the herbicidal composition is a microcapsule suspension-suspension agent, it includes: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl, 2-25% of surface active substances, 1-20% of capsule wall materials, 0.1-5% of initiators and the balance of solvents.
The above-mentioned wall material is generally a resin, and may be, for example, one or more of polyurethane resin, polyurea resin, urea-formaldehyde resin, melamine-formaldehyde resin, and phenol-formaldehyde resin, polyisocyanate resin, and urea-formaldehyde resin.
The initiator can be one or more of acetic acid, hydrochloric acid, ethylenediamine, triethylamine or triethanolamine.
The preparation method of the microcapsule suspension-suspending agent can adopt the combination of the preparation method of the microcapsule and the preparation method of the suspending agent, which are conventional in the field. For example, the preparation method of the microcapsule suspension-suspension agent according to the present invention includes: dissolving metribuzin in a partial solvent in a reaction container with heat preservation and stirring, adding a part of surface active substances, the other part of solvent and a capsule wall material, stirring at a high speed of 800-1600 rpm, adding an initiator after uniformly stirring, stirring at a low speed of 40-150 rpm, gradually heating to 40-75 ℃, and stirring at a stirring speed of 40-150 rpm at a heat preservation condition of 40-75 ℃ for 3-6 hours to obtain a micro-capsule suspending agent of metribuzin; and uniformly shearing and mixing the florasulam, the pyraflufen-ethyl and the other part of surface active substances at a high speed, ball-milling for 1-4 hours in a ball mill to ensure that the particle size of the particles is below 5 mu m, adding the particles into the aqueous phase solution of the microcapsule suspending agent, stirring for 0.5-3 hours at a stirring speed of 40-150 r/min, and supplementing the balance with deionized water to prepare the microcapsule suspending-suspending agent.
The microcapsule suspension-suspending agent dosage form is adopted, so that the application frequency can be reduced, and the application cost can be reduced.
The weeding composition can be used for preventing and removing broadleaf weeds in fields of wheat, transplanted rice and sugarcane by compounding metribuzin, florasulam and pyraflufen-ethyl. Especially for annual broadleaf weeds, the weeding composition still has better selective control effect on the broadleaf weeds in a crop field with biomass less than 2% and at the temperature of less than 15 ℃.
Specific examples will be listed below to representatively illustrate embodiments of the present invention.
The composition of the invention takes metribuzin as an active ingredient (A), florasulam as an active ingredient (B) and pyraflufen-ethyl as an optional active ingredient (C) to form ternary compounding, and has obvious synergistic effect on the control of broadleaf weeds.
Indoor toxicity test
The determination method comprises the following steps:
uniformly dibbling the bud-accelerated shepherd's purse and the dry seeds of the descurainia sophia into black plastic nutrition cups (the diameter is 20cm) filled with nutrient soil, covering soil with 30 granules in each cup, soaking in water to completely wet the soil, and culturing in a greenhouse. And when the weeds grow to 4-6 leaves, determining 10 plants/cup for later use.
The medicament is completely dissolved by acetone to prepare mother liquor, and the mother liquor is gradually diluted to the required concentration according to the requirement of experimental design dosage.
Spraying stem and leaf. Spraying stem and leaf with raw measuring spray tower, adding water 100ml/m2Droplet diameter 100 μm, nozzle flow 90 mL/min-1And a clear water contrast is set.
The combination action types of the 3 herbicides are evaluated by a Colby method, and the actual control effect of the mixed herbicide is calculated by the following formula:
in the formula: x is the survival rate of the weed of the herbicide A when the dosage is P;
y is the survival rate of the weed of the herbicide B when the dosage is Q;
z is the survival rate of the weed of the herbicide C when the dosage is W;
n is the number of the mixed medicaments, namely n is 3;
E0the theoretical weed survival rate of the herbicide (A + B + C) at the dosage of (P + Q + W);
e is the actual weed survival rate of the herbicide (A + B + C) at the dosage of (P + Q + W);
E0-E>10% of the composition is synergistic effect; e0-E<-10% is antagonism; e0An E value of. + -. 10% is additive effect.
Measuring the fresh weight of the overground part, and respectively counting the fresh weight control effect:
the survival rate (%) of the weeds is 100-fresh weight control effect.
TABLE 1 fresh weight control of Galium aparine with single agent
TABLE 2 evaluation of the control of ternary built reagents in different proportions
As can be seen from the data in the tables 1 and 2, the fresh weight control effect of the compound of metribuzin, florasulam and pyraflufen-ethyl on the shepherd's purse and chickweed is far greater than that of each single agent, and the E in a series of proportions0-E>10 percent of the composition has obvious synergistic effect after the metribuzin, the florasulam and the pyraflufen-ethyl are compounded.
(II) field herbicide efficacy test
Examples
Example 110.5% (metribuzin 7.5% + florasulam 1.5% + pyraflufen-ethyl 1.5%) wettable powder
7.5% of metribuzin, 1.5% of florasulam, 1.5% of pyraflufen-ethyl, 3% of sodium dodecyl benzene sulfonate, 15% of dodecyl amide betaine and the balance of diatomite are uniformly stirred and mixed, and superfine grinding is carried out by an airflow grinder to prepare 14% of metribuzin-florasulam-pyraflufen-ethyl wettable powder.
Example 248% (metribuzin 30% + florasulam 9% + pyraflufen 9%) oil suspension
5 percent of sodium lignosulphonate, 15 percent of dodecyl phenol polyoxyethylene ether and 6 percent of hydroxyethyl cellulose are sheared at high speed and stirred uniformly, 30 percent of metribuzin, 9 percent of florasulam, 9 percent of pyraflufen-ethyl and 26 percent of methyl oleate are added, and the mixture is ball-milled until the diameter of particles is less than 5 microns, so that the 48 percent of metribuzin-florasulam-pyraflufen-ethyl oil suspending agent is prepared.
Example 321% (metribuzin 15% + florasulam 5% + pyraflufen-1%) aqueous suspension
5 percent of sodium dodecyl sulfate, 15 percent of fatty alcohol-polyoxyethylene ether and 3 percent of polyvinyl alcohol are sheared and stirred uniformly at a high speed, 15 percent of metribuzin, 5 percent of florasulam, 1 percent of pyraflufen-ethyl and the balance of water are added, and the mixture is ball-milled until the diameter of particles is less than 5 microns, so as to prepare the 21 percent metribuzin-florasulam-pyraflufen-ethyl water suspending agent.
Example 422% (metribuzin 15% + florasulam 2% + pyraflufen-ethyl 5%) Water dispersible granules
Uniformly stirring 15% of metribuzin, 2% of florasulam, 5% of pyraflufen-ethyl, 12% of sodium polyoxyethylene alkyl ether sulfate, 2% of dodecyl betaine, 6% of ammonium sulfate and the balance of diatomite, carrying out superfine grinding by using an airflow grinder, adding 9% of water, kneading for 30 minutes by using a kneading machine, then extruding and granulating by using an extrusion granulator, and drying for 20 minutes at 80 ℃ to obtain 22% of metribuzin-florasulam-pyraflufen-ethyl water dispersible granules.
Example 534% (metribuzin 20% + florasulam 4% + pyraflufen-ethyl 10%) microcapsule suspension-suspension formulation
Dissolving 20% of metribuzin in 7% of N-methyl pyrrolidone in a reaction vessel with heat preservation and stirring, then adding 6% of sodium dodecyl benzene sulfonate, water and 8% of polyisocyanate serving as a capsule wall material, stirring at a high speed of 1000 revolutions per minute, uniformly stirring, adding 1% of ethylene diamine serving as an initiator, stirring at a low speed of 50 revolutions per minute, gradually heating to 75 ℃, and stirring at a heat preservation condition of 75 ℃ for 6 hours at a stirring speed of 50 revolutions per minute to obtain a micro-capsule suspending agent of metribuzin; and then 4% of florasulam, 10% of pyraflufen-ethyl, 5% of fatty alcohol-polyoxyethylene ether and 8% of glycol are subjected to high-speed shearing and uniform mixing, ball milling is carried out in a ball mill for 1-4 hours, the particles with the particle size below 5 microns are added into the aqueous phase solution of the microcapsule suspending agent, stirring is carried out for 0.5-3 hours at the stirring speed of 40-150 r/min, and the balance is made up by deionized water.
Comparative example 13% (florasulam 1.5% + pyraflufen-ethyl 1.5%) wettable powder
A ternary compounded formulation was prepared in the same manner as in example 1, except that metribuzin was not added.
Comparative example 210.5% (florasulam 9% + pyraflufen-ethyl 1.5%) wettable powder
A ternary complex formulation was prepared in the same manner as in example 1, except that the active ingredients were 9% florasulam and 1.5% pyraflufen-ethyl.
Comparative example 39% (metribuzin 7.5% + pyraflufen-1.5%) wettable powder
A ternary complex formulation was prepared in the same manner as in example 1, except that the active ingredients were 7.5% metribuzin and 1.5% pyraflufen-ethyl.
Comparative example 410.5% (metribuzin 9% + pyraflufen-1.5%) wettable powder
A ternary complex formulation was prepared in the same manner as in example 1, except that the active ingredients were 9% metribuzin and 1.5% pyraflufen-ethyl.
Comparative example 59% (metribuzin 7.5% + florasulam 1.5%) wettable powder
A ternary complex formulation was prepared in the same manner as in example 1, except that the active ingredients were 7.5% metribuzin and 1.5% florasulam.
Comparative example 610.5% (metribuzin 9% + florasulam 1.5%) wettable powder
A ternary complex formulation was prepared in the same manner as in example 1, except that the active ingredients were metribuzin 9% and florasulam 1.5%.
The field test method comprises the following steps: the respective agents according to the above examples and comparative examples were accurately weighed according to the area of the test zone, diluted in a form suitable for spraying in a predetermined effective amount, and uniformly sprayed. The nozzle is a special fan-shaped nozzle for weeding, and the spraying is carried out in the afternoon without wind in sunny days: (1) in a wheat field, the biomass content is 7 percent, and the temperature is 20 ℃ when the pesticide is applied; (2) in a wheat field, the biomass content of soil is 7%, and the temperature is 10 ℃ when the pesticide is applied; (3) in wheat field, the biomass content is 1.5%, and the temperature is 20 ℃ when applying the pesticide. When spraying, the liquid medicine is uniformly sprayed into a test cell, so that the repeated spraying and the missing spraying are avoided.
After the test is finished, the weed death condition is observed 20 days after the drug is applied, 1 square meter is randomly selected from each test area to carry out weed death rate investigation, and the control effect is calculated respectively.
TABLE 3 field test of efficacy
As shown in the test results in table 3, the results show that the control effect of the compound preparation of metribuzin, florasulam and pyraflufen-ethyl 20 days after application is obviously improved compared with that of the respective single preparation, particularly the control effect of broadleaf weeds such as shepherd's purse and descurainia sophia is obviously improved, the selectivity of the compound preparation on broadleaf weeds is improved, and the control effect of the ternary compound preparation is better than that of each binary compound preparation in the comparative example. Therefore, three active ingredients of the ternary complex are mutually supported and act synergistically, so that the remarkable technical effects of improving the control effect and expanding the weed control spectrum are realized.
On the other hand, the test results also prove that the compounded reagent according to the embodiments 1-5 obviously improves the control effect of the compounded reagent at low temperature even at the application temperature of 10 ℃ or when the biomass content of the crop field is 2%, and overcomes the influence of the soil biomass content on the control effect.
Claims (10)
1. The weeding composition is characterized by comprising an active ingredient A and an active ingredient B, wherein the active ingredient A is metribuzin, the active ingredient B is florasulam, and the weight ratio of the active ingredient A to the active ingredient B is (1-40) to (0.1-20).
2. The herbicidal composition of claim 1, further comprising pyraflufen-ethyl as an active ingredient, and the weight ratio of the active ingredient A, the active ingredient B and the active ingredient C is (1-40): (0.1-20): (0.1-20).
3. A herbicidal composition according to claim 1 or 2, wherein the sum of the weight percentages of active ingredients is 10 to 50% based on the total weight of the herbicidal composition.
4. A herbicidal composition according to claim 1 or 2, wherein the formulation of the herbicidal composition is selected from the group consisting of dispersible oil-suspendable agents, aqueous suspendable agents, wettable powders, granules and microcapsule suspension-suspendable agents.
5. A herbicidal composition according to claim 1 or 2, wherein the effective amount of the herbicidal composition is 50 to 700g (a.i.)/ha.
6. A herbicidal composition according to claim 2, wherein the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl and 2-25% of surface active substances.
7. A herbicidal composition according to claim 2, wherein the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl, 2-25% of surface active substances, 1-5% of thickening agents and 5-40% of solvents.
8. A herbicidal composition according to claim 7, wherein the herbicidal composition comprises, based on the total weight of the herbicidal composition: 5-40% of metribuzin, 1-10% of florasulam, 1-10% of pyraflufen-ethyl, 2-25% of surface active substances, 1-10% of disintegrating agents and 5-60% of fillers.
9. Use of the herbicidal composition according to any one of claims 1 to 8 for controlling weeds.
10. Use according to claim 9, wherein the herbicidal composition is for controlling broadleaf weeds in wheat fields.
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| CN1332608A (en) * | 1998-11-10 | 2002-01-23 | 辛根塔参与股份公司 | Herbicidal composition |
| US20110152088A1 (en) * | 2009-12-17 | 2011-06-23 | Bayer Cropscience Ag | Herbicidal Composition Comprising Flufenacet |
| CN102273466A (en) * | 2011-06-28 | 2011-12-14 | 陕西美邦农药有限公司 | Weeding composition containing florasulam and triazines |
| CN102283219A (en) * | 2011-07-04 | 2011-12-21 | 陕西美邦农药有限公司 | Weeding composition containing florasulam and praflufenethyl |
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