An investigation of insecticide resistance of the dengue vector Aedes albopictus in Wuhu city of Anhui province, China
HOU Yin-xu1, CHEN Li1, QIAN Bang-qun2, WANG Fei2, AN Zhou2, TONG Fei2, HUANG Fa-yuan1
1. Department of Disinfection and Vector Control, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui 230601, China; 2. Wuhu Center for Disease Control and Prevention, Wuhu, Anhui 241002, China
Abstract：Objective To investigate the current status of insecticide resistance of Aedes albopictus in Wuhu city of Anhui province, China, and to provide a scientific basis for formulating standard and rational strategies for the use of public health insecticides and the prevention and control of dengue fever. Methods The larval dipping method in the sensitive baseline method was used. The insecticides to be tested were diluted by acetone into a series of concentrations, and 1 ml was taken from each concentration and was prepared into 200 ml aqueous solution. A total of 20 IV-instar larvae were placed in each solution, and the number of deaths were observed 24 hours later. SPSS 20.0 software was used to calculate median lethal concentration (LC50), and the level of insecticide resistance was compared. Results A total of 2 760 Ae. albopictus larvae were tested, and the LC50 values of permethrin, deltamethrin, beta-cypermethrin, propoxur, and malathion were 0.054 142, 0.007 077, 0.020 922, 0.305 849, and 0.139 400 mg/L, respectively. The resistance ratios of Ae. albopictus larvae to permethrin, deltamethrin, beta-cypermethrin, and propoxur were 27.14, 17.69, 23.27, and 0.85, respectively, suggesting moderate resistance to permethrin, deltamethrin, and beta-cypermethrin and sensitivity to propoxur. ConclusionAe. albopictus larvae in Wuhu are moderately resistant or sensitive to four commonly used insecticides. It is recommended to reduce the use of pyrethroid insecticides and use sensitive insecticides alternatively to delay the occurrence and development of insecticide resistance.
侯银续, 陈李, 钱帮群, 王斐, 安洲, 仝飞, 黄发源. 安徽省芜湖市登革热媒介白纹伊蚊的抗药性研究[J]. 中国媒介生物学及控制杂志, 2021, 32(1): 78-80.
HOU Yin-xu, CHEN Li, QIAN Bang-qun, WANG Fei, AN Zhou, TONG Fei, HUANG Fa-yuan. An investigation of insecticide resistance of the dengue vector Aedes albopictus in Wuhu city of Anhui province, China. Chines Journal of Vector Biology and Control, 2021, 32(1): 78-80.
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2021, Vol. 32 
