关键词: 白纹伊蚊, 抗药性, 密度监测, 季节消长

Abstract: Objective To investigate the seasonal dynamics and insecticide resistant level of Aedes albopictus in Nanchang city and provide evidence for rational application of insecticides and controlling methods of dengue. Methods Insecticide resistance was tested with exposure tubes on adults and dipping method on larvae, adult density surveillance was conducted with double stack net and Breteau index(BI), and spoon larval method were used for larval monitoring. Results Aedes albopictus had two activity peaks between June and October in Nanchang, the average net trap index was 2.46, the average BI was 4.91. The adult Ae. albopictus showed resistance to beta cypermethrin, cypermethrin, deltamethrin, cyhalothrinm,and DDT. The larvae were resistant to DDT, DDVP, propoxur, and cypermethrin, the resistance index was 15.53-30.07 fold. But it was susceptible to cypermethrin. Conclusion It is recommended to strengthen the surveillance of Ae. albopictus resistance and density variation and choose reasonable rotation with pesticides, to delay insecticide resistance and control dengue fever effectively.

Key words: Aedes albopictus, Insecticide resistance, Density monitor, Seasonal dynamic