Abstract: Objective To investigate the seasonal variation in the density of Aedes albopictus and its resistance to seven common insecticides at three national surveillance sites in Fujian province, China, and to provide a basis for formulating scientific strategies for dengue fever prevention and control as well as rational use of public health insecticides. Methods From March to December 2019, the density of Ae. albopictus at three national surveillance sites in Fujian province was monitored using the double-layered mosquito net method and Breteau index; the insecticide resistance of Ae. albopictus was determined using the larval dipping method and adult mosquito exposure tube method. Results At the three national surveillance sites in Fujian province, the annual mean net trap index was 3.93 mosquitoes/net·hour, and the mean Breteau index was 5.75; the density of Ae. albopictus reached a peak in June. The net trap indexes for old tire storage sites, recycling stations, and construction sites were 3.69, 3.77, and 4.32 mosquitoes/net·hour, respectively; the highest net trap index was observed at construction sites; among various types of water containers, idle containers had the highest positive rate (up to 45.92%). All Ae. albopictus larvae at the three national surveillance sites were sensitive to temephos; all adult mosquitoes (except for those in Xiamen, China which were sensitive to malathion and propoxur) showed varying degrees of resistance to seven common insecticides, namely, deltamethrin, permethrin, beta-cypermethrin, lambada-cyhalothrin, alpha-cypermethrin, malathion, and propoxur. Conclusion In the three national surveillance sites in Fujian province, the density of Ae. albopictus peaked one month earlier in 2019 than in 2018, and the mosquitoes developed varying degrees of resistance to the tested insecticides. It is of great significance to enhance the surveillance of the density and insecticide resistance of Ae. albopictus for rational use of insecticides, better prevention and control of mosquito-borne diseases such as dengue, and implementation of sustainable vector control strategies.

Key words: Aedes albopictus, Density, Insecticide resistance

摘要： 目的 了解福建省3个国家级监测点白纹伊蚊密度季节消长及对7种常用杀虫剂的抗药性水平，为科学制定登革热防控策略和合理使用卫生杀虫剂提供依据。方法 2019年3－12月，在福建省3个国家级监测点地区，用双层叠帐法和布雷图指数法监测白纹伊蚊密度；用幼虫浸渍法和成蚊接触筒法测定白纹伊蚊对杀虫剂的抗药性水平。结果 福建省3个国家级监测点全年帐诱指数平均为3.93只/（顶·h），布雷图指数（BI）平均为5.75，白纹伊蚊密度高峰在6月，旧轮胎堆放地、废品站、工地帐诱指数分别为3.69、3.77和4.32只/（顶·h），工地帐诱指数最高。各类积水容器中以闲置容器幼蚊阳性率最高，达45.92%。3个国家级监测点白纹伊蚊幼虫对双硫磷敏感，除厦门地区成蚊对马拉硫磷和残杀威敏感外，其余监测点成蚊对溴氰菊酯、氯菊酯、高效氯氰菊酯、高效氯氟氰菊酯、顺式氯氰菊酯、马拉硫磷和残杀威7种常用杀虫剂均产生不同程度的抗药性。结论 2019年福建省3个国家级监测点白纹伊蚊密度高峰较2018年提前了1个月，对测试的杀虫剂产生了不同程度的抗性。加强白纹伊蚊密度和抗药性监测，对合理使用杀虫剂，做好登革热等蚊媒传染病防控，执行“媒介生物可持续控制”策略有重要意义。

关键词: 白纹伊蚊, 密度, 抗药性