Topramezone, nicosulfuron and atrazine compounded dispersible oil-based suspension agent and preparation method thereof

Abstract

Relating to the technical field of corn field annual weed control, the invention provides a topramezone, nicosulfuron and atrazine compounded dispersible oil-based suspension agent and a preparation method thereof. The compounded dispersible oil-based suspension agent is prepared from 1.5 parts of topramezone, 4.5 parts of nicosulfuron, 22 parts of atrazine, 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 of a defoaming agent and 62.7 parts of deionized water. The preparation method includes: pumping the raw materials into a preparation kettle to conduct mixing, then performing primary grinding by a colloid mill, and conducting fine grinding by a sand mill, carrying out sampling analysis, and when the sample is qualified, conducting filtering, metering, packaging and warehousing. According to the invention, the topramezone, nicosulfuron and atrazine compounded dispersible oil-based suspension agent can achieve an obvious synergistic action range when topramezone, nicosulfuron and atrazine are compounded in a ratio of 1.5:4.5:22 to a concentration of 28%, while preparations formed by mixing in other ratios cannot achieve the obvious synergistic action range.

Description

technical field [0001] The invention relates to the technical field of annual weed control in cornfields, in particular to a dispersible oil-suspending agent compounded with oxaflumezone, nicosulfuron and atrazine and a preparation method thereof. Background technique [0002] At present, existing herbicidal compositions for controlling annual weeds in cornfields such as crabgrass, barnyardgrass, velvetleaf, and quinoa, for example, Chinese patent "CN104126590A" discloses a "weed-killing composition in cornfields containing oxatrazone". Drug composition", wherein the effective active ingredients are fenflumezone, mesotrione and atrazine, and the ratio of the three is 0.5-40:1-40:5-80. Another Chinese patent "CN104855394A" discloses a "post-emergence herbicide composition containing oxentrazone", in which the effective active ingredients are oxentrazone, metethenyl and atrazine, and the ratio of the three is 0.1~70: 0.1~80: 0.1~80. [0003] The inventor has verified through...

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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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