关键词: 德国小蠊, 抗药性, 发展趋势

Abstract: Objective To investigate the resistance dynamics for Nanchang field strain of Blattella germanica against the commonly used insecticides from 2006 to 2016. Methods Field B. germanica strains were collected from the farm product markets, restaurants, hotels and supermarkets on June and July in 2006, 2010, 2014, and 2016. Residual film method and diagnostic dose method were used. Results From 2006 to 2016, by examining with the residual film method, we found that the resistance ratios of the Nanchang field strain of B. germanica against each insecticide were as follows:DDVP, 1.44, 1.45; acephate, 0.53, 0.77; propoxur, 1.09, 1.36, 1.25, 1.74; deltamethrin, 1.36, 12.73, 16.01; beta- cypermethrin, 4.99, 3.57, 4.72, 10.04; cyhalothrin, 2.34, 5.39, and alpha-cypermethrin, 3.19, 5.99. By diagnostic dose method, the resistance of Nanchang field strain of B. germanica against DDVP and propoxur has also been found. Conclusion From 2006 to 2016, the resistance to pyrethroid insecticides such as deltamethrin has developed from low to medium level, part of them reached high level. The resistance to DDVP, chlorpyrifos and propoxur remained low. The Nanchang strain of B. germanica remains susceptible to acephate.

Key words: Blattella germanica, Insecticide resistance, Dynamics research