关键词: 世界园艺博览会, 病媒生物, 抗药性

Abstract: Objective To understand the resistance of main vectors to commonly-used insecticides by the successive investigation in Tangshan International Horticultural Exposition park and surrounding areas from 2012 to 2016, and to provide the scientific basis for vector control. Methods Using dipping, topical application and residual film methods to measure the resistance of Culex pipiens pallens, Musca domestica, and Blattella germanica. Results The resistance ratio of Cx. pipiens pallens to temephos, chlorpyrifos, cypermethrin, tetramethrin and DDT were 0.82, 0.50, 1.94, 2.18, and 0.88, and all considered susceptible. As compared with the previously recorded results(1983, 1991), however, Cx. pipiens pallens showed increased tolerance to deltamethrin in 2009-2011. The resistance ratio of M. domestica to tetramethrin, beta-cyfluthrin, alpha-cypermethrin, deltamethrin, and azamethiphos were 3.13, 2.21, 7.07, 100.67, and 6.71, respectively. Musca domestica had low resistance to tetramethrin, beta-cyfluthrin, alpha-cypermethrin, and azamethiphos, and with high resistance to deltamethrin. As compared with the previously reported results(1983), M. domestica showed increased resistance to deltamethrin in 2012-2016,and slightly decreased compared with 1991. The resistance ratio of B. germanica to cypermethrin, deltamethrin, tetramethrin, beta-cyfluthrin, and chlorpyrifos were 37.28, 18.61, 35.95, 27.05, and 17.04, and all considered high resistance. Conclusion Choosing high sensitive pesticides to reasonably kill vectors will ensure effective prevention and control of the vectors for 2016 International Horticultural Exposition.

Key words: International Horticultural Exposition, Vector, Insecticide resistance