Cyhalofop-butyl and bispyribac-sodium compounded dispersible oil suspension and preparation method thereof

Abstract

The invention discloses a cyhalofop-butyl and bispyribac-sodium compounded dispersible oil suspension and a preparation method thereof, and relates to the technical field of annual weed prevention and control in rice fields of direct seeding cultivation. The cyhalofop-butyl and bispyribac-sodium compounded dispersible oil suspension is at least prepared from 16 parts of cyhalofop-butyl, 4 parts of bispyribac-sodium, 6 parts of sodium methylene bis-naphthalene sulfonate, 2 parts of xanthan gum, 2 parts of monododecyl ester, 15 parts of emulsifier 602 and the balance of methyl oleate, totaling 100 parts. The preparation method comprises the following steps: pumping the raw materials into a preparation kettle for mixing and stirring, and initially grinding through a colloid mill; performing fine milling through a sand mill; sampling and analyzing; filtering, metering, packaging, and warehousing after qualification. By adopting the 20 percent dispersible oil suspension compounded from the cyhalofop-butyl and the bispyribac-sodium in the ratio of 4:1, a remarkable synergistic effect can be achieved while a preparation compounded in other mixture ratios cannot reach a remarkable synergistic effect acting 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 cyhalofop-methyl and bispyribac and a preparation method thereof. Background technique [0002] At present, there are existing herbicidal compositions used for the control of annual weeds in direct-seeding paddy fields, for example, Chinese patent "CN105010366 A" discloses a "paddy field herbicidal composition containing pyrifluben and grass-carban and its application", It consists of the first active ingredient pyrifluben, the second active ingredient glopyr and auxiliary agents, and the weight ratio of the first active ingredient to the second active ingredient is (0.5-20):(10-300). In addition, the Chinese patent "CN 104430461 A" discloses a "compounded dispersible oil suspension concentrate of pyrazosulfuron-methyl, fenoxaprop-ethyl and penoxsulam and its preparation method", which c...

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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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