ISSN 1003-8280 CN 10-1522/R 中国疾病预防控制中心 主办
Chinese Journal of Vector Biology and Control >
Surveillance results of Culex pipiens pallens resistance to commonly used insecticides in Hebei province, China
Received date: 2014-08-07
Online published: 2014-12-20
Objective To investigate the resistance of Culex pipiens pallens to five commonly used insecticides in Hebei province, China. Methods The susceptibility of Cx. pipiens pallens larvae to commonly used insecticides was determined by WHO larval immersion method. Insecticide resistance was evaluated and compared based on median lethal concentration (LC50) and 95% confidence interval (95%CI). Results The LC50 values of beta-cypermethrin, permethrin, deltamethrin, fenobucarb, and DDVP for 11 field populations of Cx. pipiens pallens were 0.0008-0.1664, 0.0159-0.2280, 0.0006-0.0148, 0.0800-0.6138, and 0.1783-0.5000 μg/ml, respectively. As compared with the previously reported results (1991-1994), Cx. pipiens pallens showed increased resistance to permethrin and slightly decreased resistance to DDVP and deltamethrin. Conclusion The 11 field populations of Cx. pipiens pallens have developed different levels of insecticide resistance. The surveillance of insecticide resistance should be strengthened to provide guidance for the proper application of insecticides.
Key words： Culex pipiens pallens; Insecticide resistance; LC50
HAN Xiao-li, HUANG Gang, MA Li-hua, WANG Xi-ming, ZHU Yuan-sheng . Surveillance results of Culex pipiens pallens resistance to commonly used insecticides in Hebei province, China[J]. Chinese Journal of Vector Biology and Control, 2014 , 25(6) : 530 -533 . DOI: 10.11853/j.issn.1003.4692.2014.06.012
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