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

摘要： 目的 了解南昌市登革热传播媒介白纹伊蚊密度消长及对常用杀虫剂的抗药性水平，为合理选择和使用杀虫剂，科学防控登革热疫情提供科学依据。方法 2016年5-10月，在南昌市所有县（区）的居民区、公园和建筑工地采集蚊幼虫，取实验室饲养至3龄末4龄初的蚊幼虫进行测定。采用WHO推荐的幼虫浸渍法和成蚊接触筒法分别测定蚊幼虫和成蚊的抗药性；密度监测成蚊采用双层叠帐法，蚊幼虫采用布雷图指数（BI）法和勺捕法。结果 南昌地区白纹伊蚊成蚊全年有6月和10月两个活动高峰，平均帐诱指数为2.46只（顶/ ·h），BI平均为4.91。白纹伊蚊成蚊对高效氯氰菊酯、氯氰菊酯、溴氰菊酯、高效氯氟氰菊酯和DDT均产生一定的抗药性，幼虫对DDT、DDVP、残杀威和氯菊酯表现为中等抗性水平，抗性倍数在15.53~30.07倍之间，对氯氰菊酯表现为相对敏感。结论 加强对白纹伊蚊抗药性和密度消长监测，合理轮用杀虫剂，减缓抗药性产生，能有效防控登革热疫情。

关键词: 白纹伊蚊, 抗药性, 密度监测, 季节消长