Objective To investigate the resistance of Culex tritaeniorhynchus, Cx. pipeus palleus and Aedes albopictus to three kinds of insecticides in Shanghai and provide scientific evidence for its control. Methods The dipping method recommended by WHO was used. Results Cx. tritaeniorhynchus, Cx. pipens pallens and Ae. albopictus had high resistance to dichlorvos, and the maximum resistance ratios were 430. 58, 79.47 and 74. 81 respectively. Except that mosquito in some districts had high resistance to dehamethrin and cypermethrin, its resistance to these two insecticides had relatively low resistance in other districts. In several districts such as Huangpu district, Baoshan district and chongming district, it was even sensitive to these common used insecticides. Conclusion It is necessary for mosquito control to use insecticides scientificalhy based on its resistance.
Chinese Journal of Hygienic Insecticides and Equipments