Penoxsulam and cyhalofop-butyl compounded dispersible oil suspending agent and preparation method thereof

Abstract

A penoxsulam and cyhalofop compound dispersible oil suspension concentrate and a preparation method thereof relate to the technical field of annual weed control in rice direct seeding fields. At least 3 parts of penoxsulam, 20 parts of cyhalofop-methyl, 3 parts of fatty alcohol polyoxyethylene ether, 5 parts of styrylphenol polyoxyethylene ether, 0.5 part of xanthan gum, 0.3 part of sodium benzoate, 0.5 part Defoamer and deionized water made up to 100 parts. The raw materials are pumped into the preparation tank for mixing and stirring, and then firstly ground by a colloid mill, then finely ground by a sand mill, sampled and analyzed, filtered, measured, packaged, and put into storage after passing the test. According to the present invention, the compounded 23% penoxsulam and cyhalofop-ethyl compounded dispersible oil suspending agent in the ratio of 3:20 can play an obvious synergistic effect, while the mixed ratio of other Preparations, all can not reach the scope of obvious synergistic effect.

Description

technical field [0001] The invention relates to the technical field of annual weed control in direct-seeding rice fields, in particular to a penoxsulam-cyhalofop-ethyl compound dispersible oil suspension and a preparation method thereof. Background technique [0002] At present, the existing herbicidal compositions used for the control of annual weeds in direct-seeded rice fields such as barnyard grass, stephenia, and broken rice sedge, for example, Chinese patent "CN104839188A" discloses a "containing promasulfuron-methyl and cyanide "Herbicidal composition of diflufen-methyl and penoxsulam", the active ingredients are promasulfuron-methyl, cyhalofop-methyl, and penoxsulam, and the weight ratio of the three is 1-30:1-50:1 ~30. Another Chinese patent "CN103814919A" discloses an "oil suspension containing cyhalofop-methyl, pyriflufen and penoxsulam". Amines, containing 5-30% of cyhalofop-methyl, 1-10% of pyriflufen, 1-10% of penoxsulam, 1-15% of emulsifier, and 1-10% of wet...

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, 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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