Bioassay Of Insecticidal Activity And Application Techniques Of Nano Soluble Powder Of Avermectin On Tetranychus Viennensis Zacher

Through the indoor activity of Avermectins nano soluble powder prepared by Silicaaerogel Technology on Tetranychus viennensis Zacher assay, determin the best type ofsolvent used in Processing. Studying the Field Application Technology ControlingTetranychus viennensis Zacher by the selected agents, providing the basis for the fieldpromotion and use of the new agents.The activity determination test showed:2%avermectin nano soluble powder (ethylacetate) LC50was0.057mg/L. Control effect was better than conventional2%avermectinEC preparation. Selected it as the optimal agent. Tetranychus viennensis Zacher preventionfield efficacy test results show: After two test agents sprayed7day control effect more than88%, control effect has significant differences between the three concentration gradient of2%avermectin nano soluble powder (ethyl acetate). The efficacy of control agents(2%Avermectin EC5mg/kg) with no significant difference between treatment agents(2%avermectin nano soluble powder (ethyl acetate)3mg/kg);15day after spraying, the anti effectbegins to drop, The difference among the four treatments was significantly. Control agent (2%avermectin EC5mg/kg) has minimum control effect.The results showed：The control effect of2%avermectin nano soluble powder (ethylacetate) was significantly better than the traditional forms of avermectin EC, simultaneouslyas the new agents in processing without consuming oil, and saves resources and protecting theenvironment. Improve the safety of agricultural products to protect food safety.To apples andother crops for the production of income security has very important significance. It issuitable for Large-scale promotion and use in apple production to control Tetranychusviennensis Zacher, to gradually replace the abamectin EC preparation, the recommendeddosage is3mg/kg~7mg/kg.