Pyrazosulfuron-ethyl, penoxsulam and cyhalofop-butyl compounding type dispersible oil suspension agent and preparation method thereof

Abstract

The invention provides a pyrazosulfuron-ethyl, penoxsulam and cyhalofop-butyl compounding type dispersible oil suspension agent and a preparation method thereof, and relates to the technical field of preventing and controlling of annual weeds in direct seeding rice fields. The dispersible oil suspension agent is at least prepared from 5 parts of pyrazosulfuron-ethyl, 5 parts of penoxsulam, 20 parts of cyhalofop-butyl, 3 parts of fatty alcohol-polyoxyethylene ether, 5 parts of styrylphenol polyoxyethylene ether, 0.5 part of xanthan gum, 0.5 part of sodium benzoate, 0.5 part of defoaming agent, and the balance of deionized water. The preparation method comprises the following steps of sucking the raw materials into a preparation kettle, mixing, and stirring; primarily grinding by a colloid grinder, finely grinding by a grinder, sampling and analyzing; after qualifying, filtering, metering, packaging and warehousing. The dispersible oil suspension agent has the advantage that the compounded 30% dispersible oil suspension agent with mixture ratio of 1:1:1 can reach the obvious synergistic action range on preventing and controlling of annual weeds in direct seeding rice fields, but the preparation with other mixture ratio cannot reach the obvious synergistic action range.

Description

technical field [0001] The invention relates to the technical field of preventing and controlling annual weeds in direct-seeding rice fields, in particular to a dispersible oil suspending agent compounded with pyrazosulfuron-methyl, penoxsulam and cyhalofop-methyl and a preparation method thereof. Background technique [0002] At present, the existing herbicidal compositions for the control of annual weeds in direct-seeded rice fields such as barnyardgrass, purslane, crabgrass and heterocyperus, for example, Chinese patent "CN 105052982 A" discloses a "for barnyardgrass Grass compound herbicide", its raw materials include by weight: 3-6 parts of mesotrione, 0.5-1 part of penoxsulam, 1-3 parts of saflufenacil, and 0.8-3 parts of flubisulfuron-methyl , 10-15 parts of quinclorac, 2-5 parts of cyhalofop-methyl, 0.2-0.6 parts of mecitrione, 15-18 parts of tetramethylene, 4-8 parts of pyrazosulfuron-methyl, 0.004 parts of ferulic acid -0.008 parts, 0.004-0.008 parts of p-hydroxyb...

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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