Nicosulfuron, atrazine and halosulfuron-methyl compound dispersible oil suspending agent and preparation method thereof

Abstract

The invention discloses a nicosulfuron, atrazine and halosulfuron-methyl compound dispersible oil suspending agent and a preparation method thereof, and relates to the technical field of prevention and treatment of corn field annual weeds. The suspending agent is prepared from the components in parts by weight: 2.5 parts of nicosulfuron, 20 parts of atrazine, 1.5 parts of halosulfuron-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 of a defoaming agent, and 66.7 parts of deionized water. The preparation method comprises the steps: pumping the raw materials into a preparation kettle, mixing and stirring, then carrying out initial grinding by a colloid mill, carrying out fine grinding by a sand mill, sampling, analyzing, after being qualified, filtering, metering, packaging and warehousing. When the 24% nicosulfuron, atrazine and halosulfuron-methyl compound dispersible oil suspending agent is formed by mixing nicosulfuron, atrazine and halosulfuron-methyl in a ratio of 2.5 to 20 to 1.5, the acting range can be obviously synergized; however, for other preparations mixed in other ratios, the obvious synergistic acting range cannot be achieved.

Description

technical field [0001] The invention relates to the technical field of annual weed prevention and control in cornfields, in particular to a dispersible oil suspending agent compounded with nicosulfuron, atrazine and chlorpyrazosulfuron and a preparation method thereof. Background technique [0002] At present, existing herbicidal compositions for controlling annual weeds in corn fields such as crabgrass, barnyardgrass, retroverted amaranthus, and purslane, for example, Chinese patent "CN104126590A" discloses a " "Corn field herbicide composition", wherein the effective active ingredients are fentrazone, 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 long-term...

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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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