Mixed herbicide containing pyroxasulfone and diflufenican

Abstract

The invention discloses a mixed herbicide containing pyroxasulfone and diflufenican, and relates to the technical field of pesticides, the herbicide takes pyroxasulfone and diflufenican as main effective components, and the mass ratio of pyroxasulfone to diflufenican is (0.1-80): (0.1-80). The mixed herbicide disclosed by the invention has the advantages of broad spectrum, quick effect, high efficiency, low toxicity, safety, environmental protection and the like when being applied to post-emergence weeding in wheat fields.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, in particular to a mixed herbicide containing pyraclostrobin and fluazifop. Background Art

[0002] As is well known, pyroxasulfone, chemical name: 3-(5-(difluoromethoxy)-1-methyl-3-trifluoromethylpyrazole-4-methylsulfonyl)-4,5-2H-5,5-dimethyl-1,2-oxazole, molecular formula: C12H14F5N3O4S, molecular weight: 391.31. Pyroxasulfone is a new type of pyrazole selective herbicide, which is used to control the main grass weeds and broadleaf weeds in dryland crop fields by pre-emergence application. It has a wide range of application time, from before planting to after emergence, and is compatible with most commonly used herbicides. Its mechanism of action is that after treatment with pyroxasulfone, the biosynthesis of very long chain fatty acids (VLCFAs) can be greatly reduced, and the construction of fatty acid precursor substances is caused.

[0003] Picolinafen, chemical name: N-(4-fluorophenyl)-6-[3-(trifluoromethyl)phenoxy]-2-pyridinecarboxamide, is a picolinamide structural compound. It was first developed by BASF SE as a picolinamide chemical structure herbicide. Picolinafen has the advantages of low toxicity, high herbicidal performance, long action time, and wide weed control spectrum. In addition to being able to effectively control broad-leaved weeds such as Veronica officinalis, Glechoma longituba, Artemisia selengensis, and Shepherd's purse, it also has good inhibition and control effects on weeds such as Lala vine, wild violet, and Alopecurus macrostachya.

[0004] By screening the compound formulas of different pesticide varieties and selecting reasonable formulas, the actual control effect of pests and diseases can be effectively improved, the control spectrum can be expanded, the amount of medicine used can be reduced, the cost can be reduced, the pollution to the environment can be reduced, and the development of resistance of pests and diseases to pesticides can be delayed. It is an important means of comprehensive control of pests and diseases in agriculture. Summary of the invention

[0005] The object of the present invention is to provide a mixed herbicide containing pyraclostrobin and fluazifop, so as to solve the above-mentioned shortcomings in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: the herbicide contains sulfonepyraclostrobin and flupyraclostrobin as main active ingredients, and the mass ratio of sulfonepyraclostrobin to flupyraclostrobin is 0.1-80:0.1-80.

[0007] As a further description of the above technical solution: the mass ratio of sulfonepyraclostrobin to fluazifop in the herbicide is 1-60:1-60.

[0008] As a further description of the above technical solution: the mass ratio of sulfonepyraclostrobin to fluazifop is 2 to 14:1.

[0009] As a further description of the above technical solution: the mass percentage of pyraclostrobin and fluazifop in the herbicide is 1-85%.

[0010] As a further description of the above technical solution: the mass percentage of sulfonepyraclostrobin and fluazifop-butyl in the herbicide is 6-75%.

[0011] As a further description of the above technical solution: the mass percentage of sulfonepyraclostrobin and fluazifop-butyl in the herbicide is 20-75%.

[0012] As a further description of the above technical solution: a dosage form prepared with sulfonepyraclostrobin and fluazifop as main active ingredients and pesticide adjuvants, the pesticide adjuvants include but are not limited to: sodium lignin sulfonate, castor oil polyoxyethylene, sodium methyl naphthalene sulfonate formaldehyde condensate, sodium methylene bisnaphthalene sulfonate, nonylphenol polyoxyethylene ether, polyvinyl alcohol, ethylene glycol, and anti-caking agent.

[0013] As a further description of the above technical solution: the formulations of the mixed herbicide include: emulsifiable concentrate, suspension concentrate, water emulsion, microemulsion, wettable powder, and water dispersible granules.

[0014] As a further description of the above technical solution: the mixed herbicide is suitable for controlling grass weeds and broad-leaved weeds in wheat fields.

[0015] A mixed herbicide containing sulfonepyraclostrobin and flupyraclostrobin, wherein the herbicide contains sulfonepyraclostrobin and flupyraclostrobin as main active ingredients, and the mass ratio of sulfonepyraclostrobin to flupyraclostrobin is 0.1-80:0.1-80. Preferably, the mass ratio of sulfonepyraclostrobin to flupyraclostrobin is 1-60:1-60, and more preferably 2-14:1.

[0016] In the mixed herbicide, the mass percentage of pyraclostrobin and fluazifop in the herbicide is 1% to 85%, preferably 6% to 75%, and more preferably 20% to 75%.

[0017] In the binary compound preparation of sulfonepyraclostrobin and flupyraclostrobin of the present invention, in addition to the active ingredients such as sulfonepyraclostrobin and flupyraclostrobin, conventional surfactants, thickeners, solvents or solid fillers allowed in pesticide preparations can be added to prepare any dosage form allowed in pesticides. Preferably, the preparation is processed into a suspension, an aqueous emulsion, a microemulsion, a wettable powder, a water-dispersible granule, or an emulsifiable concentrate.

[0018] The application of the mixed herbicide of the present invention in weeding in wheat fields, especially in controlling grass weeds and broad-leaved weeds in wheat fields, has the advantages of a wide weed control spectrum, quick effect, low residue, low toxicity, safety and environmental protection, and is a high-quality chemical herbicide for wheat crops.

[0019] Beneficial effects of the present invention: 1. The herbicide combination of the present invention has the advantages of a wide weed killing spectrum, quick effect, high efficiency, low toxicity, low residue, safety and environmental protection, etc. It can reduce the amount of pesticides used, reduce pesticide residues, has good environmental compatibility, and is safe for humans and animals. It is a high-quality chemical herbicide for wheat crops.

[0020] 2. High herbicidal activity. The herbicidal composition of the present invention can kill weeds through two different mechanisms, so that the rate of weed resistance generation is reduced, the amount of active ingredients used is reduced, but the herbicidal activity of the herbicide is greatly improved.

[0021] 3. Broad weed control spectrum and long lasting effect. The two have different weed control mechanisms. When they are mixed, the weed control spectrum is wider and can control grass weeds and broad-leaved weeds in wheat fields.

[0022] 4. High safety. Since the content of various active ingredients is reduced, the pesticide residue is reduced while the efficacy is improved. The safety of wheat and subsequent crops is also improved, and the possibility of residual toxicity of pesticides to humans and animals is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Provide a table of the main active ingredients of the mixed herbicide for the embodiments of the present invention; DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] See also Figure 1 The embodiment of the present invention provides a technical solution of a mixed herbicide containing sulfonepyraclostrobin and flupyraclostrobin: the herbicide contains sulfonepyraclostrobin and flupyraclostrobin as main active ingredients, and the mass ratio of sulfonepyraclostrobin to flupyraclostrobin is 0.1-80:0.1-80.

[0027] In another embodiment provided by the present invention, preferably, the mass ratio of pyraclostrobin to fluazifop in the herbicide is 1-60:1-60.

[0028] In another embodiment provided by the present invention, the mass ratio of sulfonepyraclostrobin to fluazifop is 2 to 14:1.

[0029] In another embodiment provided by the present invention, the mass percentage of pyraclostrobin and fluazifop in the herbicide is 1-85%.

[0030] In another embodiment provided by the present invention, the mass percentage of pyraclostrobin and fluazifop in the herbicide is 6-75%.

[0031] In another embodiment provided by the present invention, the mass percentage of pyraclostrobin and fluazifop in the herbicide is 20-75%.

[0032] In another embodiment provided by the present invention, a dosage form is prepared with sulfonepyraclostrobin and fluazifop as main active ingredients and pesticide adjuvants, and the pesticide adjuvants include but are not limited to: sodium lignin sulfonate, castor oil polyoxyethylene, sodium methyl naphthalene sulfonate formaldehyde condensate, sodium methylene bisnaphthalene sulfonate, nonylphenol polyoxyethylene ether, polyvinyl alcohol, ethylene glycol, and anti-caking agent.

[0033] In another embodiment provided by the present invention, the formulation of the mixed herbicide includes: emulsifiable concentrate, suspension concentrate, aqueous emulsion, microemulsion, wettable powder, and water dispersible granules.

[0034] In another embodiment provided by the present invention, the mixed herbicide is suitable for controlling grass weeds and broad-leaved weeds in wheat fields. Example

[0035] 70% of pyraclostrobin, 5% of fluazifop, 6% of NNO (sodium methylenebisnaphthalene sulfonate), 5% of sodium lignin sulfonate and 100% of kaolin are prepared into a wettable powder with a mass percentage of 75% according to a conventional preparation method. Example

[0036] 60% of pyraclostrobin, 10% of fluazifop, 5% of NNO (sodium methylene bisnaphthalene sulfonate) wetting agent, 3% of ammonium sulfate, 2% of polyvinyl alcohol, and 100% of kaolin are prepared into water-dispersible granules with a mass percentage of 70% according to a conventional preparation method. Example

[0037] 40% of pyraclostrobin, 20% of fluazifop, 5% of sodium lignin sulfonate, 2% of lauryl sulfate, 5% of ammonium sulfate and 100% of kaolin are prepared into water-dispersible granules with a mass percentage of 60% according to a conventional preparation method. Example

[0038] Sulfonepyraclostrobin 20%, fluazifop 20%, dioctyl sodium succinate sulfonate 0.5%, sodium lignin sulfonate 2.5%, xanthan gum 0.1%, propylene glycol 4%, anticaking agent 1%, water to 100%, are prepared into a suspension with a mass percentage of 40% according to a conventional preparation method. Example

[0039] Sulfone metachlorvos 20%, fluazifop 40%, alkylphenol polyoxyethylene ether 3%, castor oil polyoxyethylene ether 2%, xanthan gum 0.1%, xylene 20%, ethylene glycol 5%, water to 100%, are prepared into a water emulsion with a mass percentage of 60% according to a conventional preparation method. Example

[0040] Sulfone pyraclostrobin 4%, fluazifop 16%, calcium dodecylbenzene sulfonate 5%, alkylphenol polyoxyethylene ether 3%, 150# solvent oil up to 100%, are prepared into an emulsifiable concentrate with a mass percentage of 20% according to the conventional preparation method. Example

[0041] Sulfonepyraclostrobin 1%, fluazifop 6%, calcium dodecylbenzene sulfonate 5%, castor oil polyoxyethylene ether 5%, 150# solvent oil 15%, cyclohexanone 5%, ethylene glycol 5%, water to 100%, are prepared into a microemulsion with a mass percentage of 7% according to a conventional preparation method. Example

[0042] Sulfonepyraclostrobin 1%, fluazifop 14%, sodium methyl naphthalene sulfonate formaldehyde condensate 6%, nonylphenol polyoxyethylene ether 3%, xanthan gum 0.3%, propylene glycol 5%, polysiloxane 0.2%, water to 100%, are prepared into a suspension with a mass percentage of 15% according to a conventional preparation method. Example

[0043] 1) Indoor activity measurement test The co-toxicity coefficients of the sulfometrazoline (A) and sulfometrazoline (B) preparations in Examples 1 to 8 to Veronica odorifera were determined.

[0044] Test method: Sow a certain amount of Veronica seeds in 9cm disposable paper cups, sow 10-15 seeds in each cup, and cultivate them in a light incubator. When Veronica is in the 3-6 leaf stage, spray it on the crawler crop sprayer. Continue to cultivate in the greenhouse after treatment, observe the weed control effect of each treatment regularly, weigh the fresh weight of weeds after each treatment after 30 days, and calculate the toxicity regression curve and co-toxicity coefficient according to the method proposed by Sun Yunpei et al. in 1960. A co-toxicity coefficient greater than 120 indicates that the two effective substances have a synergistic effect, a co-toxicity coefficient between 80-120 indicates that the two effective substances are additive, and a co-toxicity coefficient less than 80 indicates that the two effective substances have an antagonistic effect. The test results are shown in Table 1.

[0045] Table 1 Indoor activity test results

[0046] From the table above we can see that: The co-toxicity coefficients of the two active substances after compounding are all greater than 120, indicating that the present invention has an obvious synergistic effect.

[0047] 2) Field efficacy trials.

[0048] Test reagents: The eight binary compound herbicides in Examples 1 to 8.

[0049] Comparative drug: 40% pyraclostrobin suspension (commercially available), 20% fluazifop aqueous solution (commercially available).

[0050] Tested crops: wheat The wheat seedlings are growing well, the plants are strong, and there are no other diseases and insect pests. Target: Veronica, oatmeal, pigweed, crabgrass, shepherd's purse, pigweed, etc.

[0051] Test method: According to the area of ​​the test plot, accurately weigh various pesticides, dilute with water, and use a backpack sprayer to spray evenly. Use a fan-shaped nozzle dedicated to herbicides. When spraying, pay attention to spraying the liquid evenly in the test plot to prevent over-spraying and missed spraying.

[0052] After the test, the weed death was observed 20 days and 40 days after the application, and the herbicidal activity of various pesticides was compared. In addition, the growth of crops was observed within 1-15 days after the application (the dosage was the dosage of the active ingredient per mu) to examine whether the pesticide had any damage to the crops.

[0053] The herbicidal test results of the example preparations of the present invention are shown in Table 2 (20 days after application) and Table 3 (40 days after application). Table 2 Field efficacy test results (20 days after application)

[0054] Table 3 Field efficacy test results (40 days after drug application)

[0055] From Table 2 and Table 3, we can see that: The herbicidal composition of the invention has the advantages of expanding the herbicidal spectrum, improving the herbicidal activity, and having quick-acting and lasting effects.

[0056] Table 4 Results of the investigation on the safety of pesticides on crops

[0057] From Table 4, we can see that: The wheat in each treatment area grew well, and no drug spots were found, indicating that all the pesticides were safe for wheat. The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mixed herbicide containing pyraclostrobin and fluazifop, characterized in that: The herbicide takes sulfonepyraclostrobin and flupyraclostrobin as main active ingredients, and the mass ratio of sulfonepyraclostrobin to flupyraclostrobin is 0.1-80:0.1-80.

2. A mixed herbicide containing pyraclostrobin and fluazifop according to claim 1, characterized in that: The mass ratio of sulfonepyraclostrobin to fluazifop in the herbicide is 1-60:1-60.

3. A mixed herbicide containing pyraclostrobin and fluazifop according to claim 1, characterized in that: The mass ratio of pyraclostrobin to fluazifop is 2 to 14:

1.

4. A mixed herbicide containing pyraclostrobin and fluazifop according to claim 1, characterized in that: The mass percentage of pyraclostrobin and fluazifop-butyl in the herbicide is 1~85%.

5. A mixed herbicide containing pyraclostrobin and fluazifop according to claim 1, characterized in that: The mass percentage of pyraclostrobin and fluazifop-butyl in the herbicide is 6~75%.

6. A mixed herbicide containing pyraclostrobin and fluazifop according to claim 1, characterized in that: The mass percentage of pyraclostrobin and fluazifop-butyl in the herbicide is 20 to 75%.

7. A mixed herbicide containing sulfonepyraclostrobin and fluazifop according to any one of claims 1 to 6, characterized in that: The dosage form is prepared with pyraclostrobin and fluazifop as main active ingredients and pesticide adjuvants, wherein the pesticide adjuvants include but are not limited to: sodium lignin sulfonate, castor oil polyoxyethylene, sodium methyl naphthalene sulfonate formaldehyde condensate, sodium methylene bisnaphthalene sulfonate, nonylphenol polyoxyethylene ether, polyvinyl alcohol, ethylene glycol, and anti-caking agent.

8. A mixed herbicide containing pyraclostrobin and fluazifop according to claim 7, characterized in that: The formulations of the mixed herbicide include: emulsifiable concentrate, suspension, aqueous emulsion, microemulsion, wettable powder and water-dispersible granules.

9. The mixed herbicide containing pyraclostrobin and fluazifop according to claim 1, characterized in that: The mixed herbicide is suitable for preventing and controlling grass weeds and broadleaf weeds in wheat fields.

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