关键词: 淡色库蚊, 家蝇, 德国小蠊, 杀虫剂, 抗药性

Abstract: Objective To explore the resistance trends of Culex pipiens pallens, Musca domestica and Blattella germanica (field population) to 7 insecticides in Linhai and provide evidences for optimizing insecticides application and promoting insect control. Methods Dipping method was applied to the determination of LC₅₀ for the fourth instar larva of C.pipiens pallens, topical application method for determination of LD₅₀ for M.domestica and flask film method for determination of KT₅₀ for B.germanica. Results The resistance of C.pipiens pallens field population to bassa, acetophenate, deltamethrin and permethrin were at low level with the range from 1.89 to 8.93 (RR<10), and the resistance to dichlorovos was at medium level with the value of 10.16 (RR>10). The resistance of M.domestica field population to acetophenate and permethrin were at low level with the values of 1.26 and 5.32 (RR<10), and the resistance to dichlorovos and cypermethrin were at medium level with the value of 17.44 and 12.64 (RR>10). The resistance to deltamethrin were at high level with the value of 37.86 (RR>30). The resistances of B.germanica field population to 4 inseticides were all at low level (RR=2.53-4.12) and had no significant differences among them. Conclusion The field population of mosquito, fly and cockroach had different resistances to all 7 insecticides.