Penoxsulam and metamifop compound dispersible oil suspension agent and preparation method thereof

Abstract

The invention discloses a penoxsulam and metamifop compound dispersible oil suspension agent and a reparation method thereof, and relates to the technical field of annual weed control of rice fields of direct seeding cultivation. The penoxsulam and metamifop compound dispersible oil suspension agent is at least prepared from 2 parts of penoxsulam, 10 parts of metamifop, 4 parts of fatty alcohol-polyoxyethylene ether, 6 parts of styrylphenol polyoxyethylene ether, 1 part of xanthan gum, 1.5 parts of sodium benzoate, 1 part of organic silicon and the balance of solvent oil, wherein the total parts are 100 parts. The preparation method of the penoxsulam and metamifop compound dispersible oil suspension agent comprises the following steps of pumping the raw materials into a preparing kettle to mix and stir, and pre-grinding the raw materials through a colloid mill; performing fine grinding on the raw materials through a sand mill, performing sampling analysis, filtering after the raw materials are qualified, metering, packaging and warehousing. The 12% penoxsulam and metamifop compound dispersible oil suspension agent which is compounded by penoxsulam and metamifop in a proportion of 1 to 5 can achieve an obvious synergism range; and a preparation mixed in other proportions cannot reach the obvious synergism range.

Description

technical field [0001] The invention relates to the technical field of annual weed control in direct-seeding paddy fields, in particular to a dispersible oil-suspending agent compounded with penoxsulam and mefentrazone and a preparation method thereof. Background technique [0002] At present, the existing herbicidal composition used for the control of annual weeds in direct-seeding paddy fields, for example, the Chinese patent "CN104872147 A" discloses a "herbicidal composition containing cyclopentazone and mefenamide and its application. ", consisting of the first active ingredient oxazicone, the second active ingredient mefenacet and auxiliary agents, the weight ratio of the first active ingredient to the second active ingredient is (0.1~100):(10~120) . In addition, the Chinese patent "CN 104886074 A" discloses a "herbicidal composition containing cyclopentazone and its application", which consists of the first active ingredient cyclopentazone, the second active ingredie...

AI Technical Summary

Problems solved by technology

For example, the prepared wettable powder is easy to cause product sticking, is not easy to disperse and suspend in water, or clogs the nozzle, and causes precipitation in the sprayer, etc., resulting in uneven spraying and local phytotoxicity of crops. The main reason is that it helps There are different defects in the selection of agents and fillers

[0006] 3), compounding problem, by carrying out toxicity test, heat 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 additive synergistic effect can be achieved

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