Abstract: Objective To investigate the resistance of adult Aedes albopictus to four hygienic insecticides in Nanchong, Sichuan, China, and to provide a scientific basis for prevention and control of Ae. albopictus. Methods From June to July the larvae of Ae. albopictus were collected from five districts (counties) in Nanchong and then underwent laboratory breeding for 1 to 2 generations; female mosquitoes that had not sucked blood for 3 to 5 days after emergence were selected and tested for insecticide resistance by exposure to a tube lined with insecticide-impregnated paper as recommended by the World Health Organization. Results After exposure to 0.4% beta-cypermethrin, 0.1% deltamethrin, 0.5% malathion, and 0.05% propoxur for 1 hour, the 24-hour mortality rates of adult Ae. albopictus were 61.49%-76.00%, 22.91%-53.74%, 88.00%-100%, and 95.24%-100%, respectively; the mosquitoes were resistant to beta-cypermethrin and deltamethrin, and were sensitive or suspiciously resistant to malathion and propoxur. Conclusion Adult Ae. albopictus in Nanchong, Sichuan have developed resistance to beta-cypermethrin and deltamethrin, and remain relatively sensitive to malathion and propoxur. Surveillance of the insecticide resistance of Ae. albopictus should be strengthened, and insecticides should be used scientifically and properly to prevent or delay the development of resistance.

Key words: Aedes albopictus, Insecticides resistance, Dengue fever

摘要： 目的 研究南充市白纹伊蚊成蚊对4种常用卫生杀虫剂的抗性水平，为白纹伊蚊防控提供科学依据。方法 2019年6－7月，在南充市5个区（县）采集白纹伊蚊幼蚊，实验室饲养繁殖1~2代后，选择羽化后3~5 d未吸血雌蚊，采用世界卫生组织推荐的药膜接触筒法测定其抗药性。结果 将白纹伊蚊成蚊暴露于0.4%高效氯氰菊酯、0.1%溴氰菊酯、0.5%马拉硫磷、0.05%残杀威各1 h，24 h死亡率分别为61.49%~76.00%、22.91%~53.74%、88.00%~100%和95.24%~100%，对高效氯氰菊酯和溴氰菊酯呈现抗药性，对马拉硫磷和残杀威呈现敏感或可疑抗药性。结论 四川省南充市白纹伊蚊成蚊对高效氯氰菊酯、溴氰菊酯已经产生抗药性，对马拉硫磷和残杀威仍较敏感。应加强白纹伊蚊成蚊抗药性监测，科学合理地使用杀虫剂，预防或延缓抗药性的产生。

关键词: 白纹伊蚊, 抗药性, 登革热