Pretilachlor, cyhalofop-butyl and penoxsulam compounded dispersible oil suspension agent and preparation method thereof

Abstract

The invention discloses a pretilachlor, cyhalofop-butyl and penoxsulam compounded dispersible oil suspension agent and a preparation method thereof and relates to the technical field of weed control of rice direct sowing paddy fields. The pretilachlor, cyhalofop-butyl and penoxsulam compounded dispersible oil suspension agent is at least prepared from 20 parts of pretilachlor, 7 parts of cyhalofop-butyl, 1 part of penoxsulam, 3 parts of fatty alcohol-polyoxyethylene ether, 5 parts of styrylphenol polyoxyethylene ether, 0.5 parts of xanthan gum, 0.5 parts of sodium benzoate, 0.5 parts of antifoaming agent and the balance of deionized water. The raw materials are pumped into a preparation kettle, mixed and stirred, ground preliminarily by a colloid mill and then finely ground by a sand mill, sampling analysis is performed, and filtering, metering, packaging and put in storage are performed after a sample is qualified. The pretilachlor, cyhalofop-butyl and penoxsulam compounded dispersible oil suspension agent having the concentration of 500 g / L and compounded in the mixing ratio of pretilachlor to cyhalofop-butyl to penoxsulam being 20:7:1 can have an obvious synergy effect, while preparations prepared in other mixing ratios cannot have the obvious synergy effect.

Description

Technical field [0001] The invention relates to the technical field of weed control in direct-seeded rice fields, and specifically relates to a compound dispersible oil suspension of pretilachlor, cyhalofop-methyl and penoxsulam and a preparation method thereof. Background technique [0002] At present, there are existing herbicidal compositions used for the control of weeds in direct-seeded rice fields such as Stephanie chinensis, Moshangcai and D. Agent", in which the effective active ingredients are: 10-20% pretilachlor, 5-15% penoxsulam, 5-10% with a mass fraction of 10% bensulfuron-methyl, 0-15% Cyhalofop. Another Chinese patent "CN 103348981 A" discloses a "bicyclic susotrione compound rice field herbicide". Each component of the herbicide includes, by weight percentage: 5 to 80% active ingredients and 5 to 20 auxiliaries. %, filler 5 to 80%, of which the first active ingredient is bicyclosulfotrione, and the second active ingredient is acetochlor, metolachlor, metol...

AI Technical Summary

Problems solved by technology

For example, the prepared dispersible oil suspension concentrate is easy to cause the product to stick, it is not easy to disperse and suspend in water, or to block the nozzle, and to settle in the sprayer, etc., resulting in uneven spraying and local phytotoxicity of the crops. There are different defects in the selection of additives and fillers

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

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