Method for processing Paichongding nano-microemulsion pesticide

Abstract

The invention discloses a method for processing a Paichongding nano-microemulsion pesticide. The method comprises the following steps: 1) mixing Paichongding and zeolite powder, adding the mixture into a ball mill, arbitrarily proportioning metal balls with different particle sizes of 0.5-15mm so as to serve as a grinding ball, performing ball milling for 24-48 hours, and forming a mixture of 95%or higher and with the particle size of less than 100nm; 2) homogenizing the mixture obtained in the step 1) so as to form an insecticidal composition; and 3) mixing a surfactant, a cosurfactant, an oil phase and water so as to form microemulsion, slowly dripping the insecticidal composition into the microemulsion at a rate of 1 drop per 0.5-1 minute, stirring at a rotation speed of 3000-5000 revolutions per minute while dropping, and emulsifying in an emulsifying homogenizer for 60-120 minutes after dropping completion, thereby obtaining the nano-microemulsion preparation. The Paichongding microemulsion pesticide processed by the method disclosed by the invention has excellent stability and the mean particle size of 20-50nm, and controlled drug release is realized while the control effectis improved.

Description

technical field [0001] The present invention relates to the field of plant protection, and in particular to a processing method of pichamidin nano microemulsion pesticide. Background technique [0002] my country is a big country in the world in the production and use of pesticides. The area of ​​chemical control of pesticides is as high as 7 billion mu every year, and the usage exceeds 2 million tons. After years of development, my country has formed a relatively complete pesticide industry system, which has played an escort role for the sustained and stable increase in agricultural production. [0003] However, most of the pesticides are poorly soluble compounds. Usually, carriers, solvents, auxiliaries, etc. must be added for dosage form processing before they can be diluted with water and sprayed. Due to the coarseness and poor dispersibility of the drug-loaded particles, during the spraying process of traditional pesticide formulations in the field, more than 70% of th...

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Problems solved by technology

Due to the coarseness and poor dispersibility of the drug-loaded particles, the traditional pesticide formulations in the process of spraying in the field will lose more than 70% of the pesticides due to drug droplet rolling, dust drifting, rain erosion, etc.

[0004] The long-term large-scale and low-efficiency application of pesticides has caused serious pesticide residues in food, vegetables, fruits, and soil and water bodies in many areas of my country to exceed the standard, which not only poses a serious threat to organisms and human health, but also leads to ecosystem structure and function. the destruction of

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