Compound dispersible oil suspension concentrate of pyrazosulfuron-methyl, fenoxaprop-ethyl and penoxsulam and preparation method thereof

Abstract

The invention provides a pyrazosulfuron-ethyl, fenoxaprop-P-ethyl and penoxsulam compound dispersible oil suspension concentrate and a preparation method thereof, relating to the technical field of control of weeds in direct sowing paddy fields. The pyrazosulfuron-ethyl, fenoxaprop-P-ethyl and penoxsulam compound dispersible oil suspension concentrate is prepared from 7.5 parts of pyrazosulfuron-ethyl, 4 parts of fenoxaprop-P-ethyl, 6 parts of penoxsulam, 5 parts of fatty alcohol-polyoxyethylene ether, 8 parts of styrylphenol polyoxyethylene ether, 2 parts of xanthan gum, 1 part of sodium benzoate, 2 parts of organic silicon and 64.5 parts of solvent oil by weight. The preparation method is characterized by pumping the raw materials into a preparation kettle, mixing and stirring the raw materials, then carrying out primary milling with a colloid mill, then finely milling with a sand mill, carrying out sampling analysis, and filtering, metering, packaging and warehousing after samples are qualified. The pyrazosulfuron-ethyl, fenoxaprop-P-ethyl and penoxsulam compound dispersible oil suspension concentrate achieves better control of annual grassy weeds, cyperaceous weeds and part of broadleaf weeds in the direct sowing paddy fields, and achieves united synergy of pyrazosulfuron-ethyl, fenoxaprop-P-ethyl and penoxsulam, thus achieving obvious synergistic effects; therefore mixing pyrazosulfuron-ethyl, fenoxaprop-P-ethyl and penoxsulam to control the weeds in the direct sowing paddy fields is feasible and is also necessary.

Description

technical field [0001] The invention relates to the technical field of weed control in direct-seeding rice fields, in particular to a dispersible oil suspension compound compounded with pyrazosulfuron-methyl, fenoxaprop-p-ethyl and penoxsulam and a preparation method thereof. Background technique [0002] At present, the existing pesticides used for weed control, for example, the Chinese patent "CN103348981A" discloses a "rice field herbicide compounded with bicyclic sulcotrione", wherein the first active ingredient is bicyclic sulcotrione, and the second The active ingredients are acetochlor, metolachlor, promethachlor, pretilachlor, butachlor, mefenacet, penoxsulam, cyhalofop and so on. Another Chinese patent "CN103858914A" discloses a "wheat field herbicide composition", with fenoxaprop-ethyl and chlorpyrazosulfuron-methyl as active ingredients, wherein The weight ratio is 1:8~32:1. [0003] The inventor has verified through long-term tests that the above-mentioned seve...

AI Technical Summary

Problems solved by technology

For example, wettable powder is easy to cause product sticking, is not easy to disperse and suspend in water, or clogs the nozzle, and settles in the sprayer pipe, resulting in uneven spraying and easy to cause phytotoxicity in rice leaves and other parts.

[0006] 3), compounding problem, by carrying out toxicity test, thermal storage stability test and mixing co-toxicity coefficient measurement to the several specific proportions disclosed by the above-mentioned several herbicide compositions, it is found that no obvious synergistic effect can be achieved

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