CN111226954A - Herbicidal composition and use thereof - Google Patents
Herbicidal composition and use thereof Download PDFInfo
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- CN111226954A CN111226954A CN201811443668.8A CN201811443668A CN111226954A CN 111226954 A CN111226954 A CN 111226954A CN 201811443668 A CN201811443668 A CN 201811443668A CN 111226954 A CN111226954 A CN 111226954A
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- Prior art keywords
- herbicidal composition
- active ingredient
- flumioxazin
- 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
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/84—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms six-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,4
-
- 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
-
- 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 herbicidal composition comprises an active ingredient A and an active ingredient B. The active ingredient A is flumioxazin, and the active ingredient B is florasulam. The weight ratio of the active component A to the active component B is (0.1-20) 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 flumioxazin and florasulam, and application thereof in weed control.
Background
Flumioxazin (N- (7-fluoro-3, 4-dihydro-3-oxo- (2-propynyl) -2H-1, 4-benzoxazin-6-yl) cyclohex-1-ene-1, 2-dicarboximide) having the formula: c19H15FN2O4(ii) a Molecular weight: 354.33 of the total weight of the mixture; the structural formula is as follows:
flumioxazin is a protoporphyrinogen oxidase inhibitor, is a contact-type selective herbicide, and is used for preventing and killing broadleaf weeds and part of gramineous weeds in soybean, cotton, grapes and other many crop fields.
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, the individual use of flumioxazin, florasulam or pyraflufen-ethyl has a limited herbicidal spectrum, and the long-term use of a single agent easily causes drug resistance, so that the dosage is increased, the control effect is reduced, the drug cost is increased, and the environmental impact is increased.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a herbicidal composition, which comprises flumioxazin and florasulam as active ingredients, and thus realizes reduction of the use amount of each active ingredient and improvement of the control efficiency of broadleaf weeds, 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 flumioxazin, the active ingredient B is florasulam, and the weight ratio of the active ingredient A to the active ingredient B is (0.1-20): 0.1-20.
According to a specific embodiment, the weeding composition further comprises pyraflufen-ethyl as an active ingredient, and the weight ratio of the active ingredient A to the active ingredient B to the active ingredient C is (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%.
According to a specific embodiment, the effective dosage of the weeding composition is 10-750 g (a.i.)/hm2。
According to another embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl and 3-25% of surface active substances.
According to a specific embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl, 3-25% of surface active substances, 1-10% of disintegrating agent and 5-70% of filler.
According to another embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl, 3-25% of surface active substances, 1-5% of thickening agent and 5-40% of solvent.
Alternatively, the herbicidal composition is in a dosage form selected from the group consisting of dispersible oil-suspendable agents, water-suspendable agents, wettable powders and granules, preferably dispersible oil-suspendable agents.
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 the flumioxazin, the florasulam and the 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.
Therefore, the weeding composition has more remarkable synergistic effect compared with the flumioxazin, florasulam and pyraflufen-ethyl used independently. 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 flumioxazin, and the active ingredient B is florasulam. The weight ratio of the active component A to the active component B can be (0.1-20) 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 (0.1-20): 0.1-20), preferably (0.1-10): 5-20), more preferably (0.1-5): 10-20, most preferably (1-5): 10-15, for example, 1:5:5, or 1:10:15, or 1:5: 15.
The percentage of the active ingredient 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 herbicidal composition is used in an effective amount of 15 to 750g (a.i.)/ha, preferably 20 to 600g (a.i.)/ha, 35 to 500g (a.i.)/ha, more preferably 50 to 400g (a.i.)/ha, further preferably 60 to 200g (a.i.)/ha, for example 70g (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, 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, sodium dodecylsulfates, sodium dodecylbenzenesulfonates and sodium laurylsulfates.
Specifically, the above herbicidal composition may comprise, based on the total weight of the herbicidal composition: 0.1-10% (preferably 1-8%, more preferably 3-7%, for example 5%) of flumioxazin, 5-20% (preferably 5-15%, more preferably 10%) of florasulam, 5-20% (preferably 5-15%, more preferably 7-12%, for example 10%) of pyraflufen, and 3-25% (preferably 5-20%, more preferably 5-15%, for example 10%) of a surface active substance.
Preferably, the surface active substance may be a combination of alkylphenol ethoxylate and polycarboxylate in a weight ratio of 3:1 to 1:5 (e.g. 2:1 to 1:3, preferably 1:1, or 1:2), or may be a combination of PO-EO block polyether and sodium lauryl sulfate in a weight ratio of 5:1 to 1:7 (e.g. 5:1 to 1:5, preferably 1: 1).
The alkylphenol ethoxylates mentioned above are, for example, dodecylphenol ethoxylates.
Preferably, the weeding composition comprises 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl, 3-25% of surfactant, 1-10% of disintegrant and 5-70% of filler based on the total weight of the weeding composition.
Optionally, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl, 3-25% of surface active substances, 1-5% of thickening agent and 5-40% of solvent.
Optionally, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl, 3-25% of surface active substances, 1-5% of thickening agent and 5-35% of oily matrix.
According to yet another embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 1-15% of flumioxazin, 3-14% of florasulam, 3-14% of pyraflufen-ethyl, 3-45% of surface active substances, 1-5% of disintegrating agents and the balance of fillers.
According to yet another embodiment, the herbicidal composition comprises, based on the total weight of the herbicidal composition: 1-15% of flumioxazin, 3-14% of florasulam, 3-14% of pyraflufen-ethyl, 3-15% of surface active substances, 1-3% of binder and the balance of filler.
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, 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 and granules.
The weeding composition can be used for preventing and removing broadleaf weeds in wheat, transplanted rice and sugarcane fields by compounding the flumioxazin, the florasulam and the optional pyraflufen-ethyl. Especially for annual broadleaf weeds, the weeding composition has obviously better selective control effect on the broadleaf weeds under low dosage.
Specific examples will be listed below to representatively illustrate embodiments of the present invention.
The composition of the invention takes flumioxazin as an active ingredient (A), florasulam as an active ingredient (B), and optional pyraflufen-ethyl as an active ingredient (C) to form binary or 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 dried seeds of cleavers and chickweed which have been accelerated to sprout into black plastic nutrient cups (diameter is 20cm) filled with nutrient soil, covering soil with 30 seeds in each cup, soaking in water to completely moisten the soil, and placing the cups in a greenhouse for culturing. 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 and Stellaria
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 flumioxazin, florasulam and pyraflufen-ethyl on cleavers and chickweeds is far greater than that of each single agent, and the E in a series of proportions0-E>10 percent, so that the flumioxazin, florasulam and pyraflufen-ethyl have obvious synergistic effect after being compounded.
(II) field herbicide efficacy test
Examples
EXAMPLE 111% (flumioxazin 1% + florasulam 5% + pyraflufen-ethyl 5%) wettable powder
1% of flumioxazin, 5% of florasulam, 5% of pyraflufen-ethyl, 15% of dodecylphenol polyoxyethylene ether, 5% of sodium polycarboxylate and the balance of diatomite are uniformly stirred and mixed, and ultramicro crushing is carried out through an air flow crusher to prepare 11% of flumioxazin-florasulam-pyraflufen wettable powder.
Example 250% (flumioxazin 4% + florasulam 40% + pyraflufen-ethyl 6%) oil suspension
4 percent of PO-EO block polyether, 21 percent of sodium lauryl sulfate and 5 percent of hydroxyethyl cellulose are sheared and stirred uniformly at high speed, 4 percent of flumioxazin, 40 percent of florasulam, 6 percent of pyraflufen-ethyl and 20 percent of methyl oleate are added, and the mixture is ball-milled until the diameter of particles is less than 5 microns, so as to prepare the 50 percent of flumioxazin-florasulam-pyraflufen-ethyl oil suspending agent.
Example 331% (flumioxazin 1% + florasulam 15% + pyraflufen-ethyl 15%) aqueous suspension
5 percent of sodium dodecyl sulfate, 15 percent of fatty alcohol-polyoxyethylene ether and 2 percent of polyvinyl alcohol are sheared and stirred uniformly at a high speed, 1 percent of flumioxazin, 15 percent of florasulam, 15 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 31 percent flumioxazin-florasulam-pyraflufen-ethyl water suspension.
Example 442% (flumioxazin 2% + florasulam 10% + pyraflufen-ethyl 30%) water dispersible granules
Uniformly stirring 2% of flumioxazin, 10% of florasulam, 30% of pyraflufen-ethyl, 15% of sodium lignosulfonate, 3% of sodium dodecyl naphthalene sulfonate, 5% of ammonium sulfate and the balance of diatomite, carrying out superfine grinding by using an air flow grinder, adding 8% 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 42% of flumioxazin-florasulam-pyraflufen-ethyl water dispersible granules.
Comparative example 110% (florasulam 5% + pyraflufen-ethyl 5%) wettable powder
A ternary compounded preparation was prepared in the same manner as in example 1, except that flumioxazin was not added.
Comparative example 211% (florasulam 6% + pyraflufen-ethyl 5%) wettable powder
A ternary complex formulation was prepared in the same manner as in example 1, except that the active ingredients were 6% florasulam and 5% pyraflufen-ethyl.
Comparative example 36% (flumioxazin 1% + pyraflufen-5%) wettable powder
The ternary complex preparation is prepared by the same method as the example 1, and the difference is that the active ingredients are 1 percent of flumioxazin and 5 percent of pyraflufen-ethyl.
Comparative example 411% (flumioxazin 6% + pyraflufen-5%) wettable powder
The ternary complex preparation is prepared by the same method as the example 1, and the difference is that the active ingredients are 6 percent of flumioxazin and 5 percent of pyraflufen-ethyl.
Comparative example 56% (flumioxazin 1% + florasulam 5%) wettable powder
The ternary complex preparation is prepared by the same method as the example 1, and the difference is that the active ingredients are 1 percent of flumioxazin and 5 percent of florasulam.
Comparative example 611% (flumioxazin 6% + florasulam 5%) wettable powder
The ternary complex preparation is prepared by the same method as the example 1, and the difference is that the active ingredients are 6 percent of flumioxazin and 5 percent of florasulam.
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 spray head is a special fan-shaped spray head for weeding, and the spray head is sprayed in the afternoon without wind in sunny days. 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 plot for weed mortality investigation, and the control effect is calculated.
TABLE 3 field test of efficacy
As shown in the test results in table 3, after the flumioxazin, florasulam and pyraflufen-ethyl are compounded, the control effect of the compound preparation after 20 days is obviously improved compared with that of each single agent, the control effect on weeds, particularly broadleaf weeds such as cleavers, chickweeds and the like is obviously improved, the control spectrum is expanded, and the control effect of the ternary compounded preparation is better than that of each binary compounded 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.
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 flumioxazin, the active ingredient B is florasulam, and the weight ratio of the active ingredient A to the active ingredient B is (0.1-20): 0.1-20.
2. The herbicidal composition of claim 1, further comprising pyraflufen-ethyl as an active ingredient, wherein the weight ratio of the active ingredient A to the active ingredient B to the active ingredient C is (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 effective amount of the herbicidal composition is 10 to 750g (a.i.)/ha.
5. A herbicidal composition according to claim 2, wherein the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl and 3-25% of surface active substances.
6. A herbicidal composition according to claim 2, wherein the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl, 3-25% of surface active substances, 1-10% of disintegrating agent and 5-70% of filler.
7. A herbicidal composition according to claim 2, wherein the herbicidal composition comprises, based on the total weight of the herbicidal composition: 0.1-10% of flumioxazin, 5-20% of florasulam, 5-20% of pyraflufen-ethyl, 3-25% of surface active substances, 1-5% of thickening agent and 5-40% of solvent.
8. 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 agent, water-suspendable agent, wettable powder and granules.
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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109845751A (en) * | 2019-02-28 | 2019-06-07 | 山东德浩化学有限公司 | A kind of Herbicidal combinations containing florasulam and flumioxazin |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001233717A (en) * | 2000-02-28 | 2001-08-28 | Sumitomo Chem Co Ltd | Herbicide composition |
| CN102283219A (en) * | 2011-07-04 | 2011-12-21 | 陕西美邦农药有限公司 | Weeding composition containing florasulam and praflufenethyl |
| US20150157018A1 (en) * | 2013-12-06 | 2015-06-11 | Sumitomo Chemical Company, Limited | Weed control composition |
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2018
- 2018-11-29 CN CN201811443668.8A patent/CN111226954A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001233717A (en) * | 2000-02-28 | 2001-08-28 | Sumitomo Chem Co Ltd | Herbicide composition |
| CN102283219A (en) * | 2011-07-04 | 2011-12-21 | 陕西美邦农药有限公司 | Weeding composition containing florasulam and praflufenethyl |
| US20150157018A1 (en) * | 2013-12-06 | 2015-06-11 | Sumitomo Chemical Company, Limited | Weed control composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109845751A (en) * | 2019-02-28 | 2019-06-07 | 山东德浩化学有限公司 | A kind of Herbicidal combinations containing florasulam and flumioxazin |
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Application publication date: 20200605 |