Study on the resistance of Culex pipiens pallens to five insecticides in Baoji City
ZHANG Zheng
LYU Wen
YANG Pei-rong
LI Xu-long
DENG Feng
Abstract：Objective To investigate the resistance of Culex pipiens pallens to chlorophenothane (DDT),cypermethrin,beta-cypermethrin,deltamethrin and dithiophosphate 5 insecticides in Baoji City and provide the basis for the scientific use of insecticides.Methods The distinguishing dosage method and the median lethal dose of insecticides were used in the determination of resistance of Culex pipiens pallens.Results According to evaluation standard of distinguishing dosage resistance,Culex pipiens pallens was resistant to chlorophenothane (DDT) and deltamethrin,and preliminary resistant to cypermethrin.Based on the LC50 s,Culex pipiens pallens evolved some resistance to the insecticides tested with the resistance ratio from 3.13 to 20.22.The highest resistance of 20.22 folds was to cypermethrin.Conclusion The rational use of insecticides should be carried out for delaying the development of insecticide resistance of mosquitoes in Baoji.
Keywords：Culex pipiens pallensinsecticideresistance
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 522-524 )