关键词: 淡色库蚊, 白纹伊蚊, 抗药性

Abstract: Objective To investigate the resistances of Culex pipiens pallens and Aedes albopictus to eight insecticides for making the dynamic mosquitoe control strategy in Zhejiang. Methods Immersion method of pesticide was used to assay the medium lethal concentration (LC50) for the fourth instar larvae of mosquitoes. Results The resistances of Cx. pipiens pallens in Jinhua city to permethrin was at medium level, the RR 11.5. The resistances of Cx. pipiens pallens in Shaoxing city to beta-cypermethrin was at medium level, the RR 11.2. The Cx. pipiens pallens showed low resistance to other types of insecticides in all cities. In Jinhua city, the resistances of Ae. albopictus to dichlorvos was at high level, the RR 22.8. The resistances of Ae. albopictus to permethrin and tetramethrin were at medium level, the RR 13.4 and 11.4, respectively. In Ningbo city, the resistances of Ae. albopictus to deltamethrin and β-cypermethrin were at medium level, the RR 17.2 and 11.8, respectively. In Yiwu city, the resistances of Ae. albopictus to beta - cypermethrin was at high level, the RR 28.8. The resistances of Ae. albopictus to deltamethrin and permethrin were at medium level, the RR 19.7 and 18.4, respectively. The Ae. albopictus showed the lower resistance in other area. Conclusion The Cx. pipiens pallens and Ae. albopictus demonstrated varied resistance to the pesticides,and were mostly resistant to pyrethroid pesticide. The monitoring of their insecticide resistance should be strengthened in conjunction with scientific and proper application of insecticides.

Key words: Culex pipiens pallens, Aedes albopictus, Insecticide resistance