Weed-control composite containing quizalofop-p-ethyl, fomesafen and clomazone and preparation method thereof

Abstract

The invention relates to a combined weed control formulation containing quizalofop-p-ethyl, fomesafen and clomazone and a preparation method thereof. The preparation method comprises the following steps: adopting an emulsifiable solution formulation, in which the total weight of the quizalofop-p-ethyl, the fomesafen and the clomazone is 18 percent; and the fomesafen is mixed with organic amine inadvance to form salts according to the proportion of 1:5-5:1 by percentage by weight, so that the salts can be dissolved in vegetable oil or derivatives of the vegetable oil; and mixing the salts with the quizalofop-p-ethyl and the clomazone, adding 1 to 3 weight percent of isobutyl alcohol and 5 to 10 weight percent of emulsifier into the mixture to give the emulsifiable solution with transparent and uniform state, and taking the balance as the vegetable oil or the derivatives of the vegetable oil of a solvent. Compared with the prior art, the combined weed control formulation has the advantages that the reaction of raw medicines of diphenyl ether substances such as the fomesafen, and the like and the organic amine is performed to generate amine salts in advance, so that the amine salts can be dissolved in an environment-friendly vegetable oil solvent to realize the abandon of the prior solvent which is harmful to the environment and represented by DMF.

Description

technical field [0001] The invention relates to the field of herbicidal combination agents, in particular to a herbicidal combination formulation containing quizalofop-p-sperm, fomesafen and clomazone and a preparation method thereof. Background technique [0002] Fomesafen is a commonly used diphenyl ether selective herbicide, mainly used for the control of broad-leaved weeds in soybean fields. It is often used in combination with Quizalofop-p-ethyl and Clomazone to improve selectivity and herbicidal effect. [0003] Usually in use, fomesafen and other active ingredients are formulated into emulsifiable concentrate formulations. Traditionally, the original drug is dissolved by solvents with high solubility, such as DMF, DMSO, or solvents containing aromatic rings such as xylene. When formulating emulsifiable concentrate formulations with high content of original drug, it is necessary to use a large amount of this solvent, especially DMF or DMSO. This is due to the low sol...

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Problems solved by technology

This is due to the low solubility of diphenyl ether herbicides in most solvents. For example, the solubility of fomesafen in other solvents (20°C) is: acetone 300g / L, cyclohexanone 0.5g / L , xylene 1.9g / L, but only in polar solvents such as N,N-dimethylformamide (DMF), it is easier to dissolve, so, in fact, the diphenyl ether herbicides in the market at present are in Most of them use DMF when making emulsifiable concentrates. This kind of solvent is not only highly corrosive, it is easy to cause running, popping, dripping, and leaking during production, transportation and use, and the requirements for packaging materials are also strict, which increases production. The cost of the enterprise; more importantly, it is highly toxic and easy to cause harm to humans and animals, thus seriously polluting the environment

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