2004•Zhongguo meijie shengwuxue ji kongzhi zazhiRequires access
Study on the Biological Characteristics of Deltamethrin-resistant Strain of Culex pipiens pallens
Fenglin Song, Zhao Tongyan, Yan-De Dong, Lu Baolin
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Abstract
Objective To find disadvantage of resistant strain by comparing the major biological characteristics of susceptible strain with resistant strain and calculating the fitness of resistant strain,for the better theories about reasonable utilization of pesticides. Methods The biological characteristics about bloodsucking,reproduction and development of resistant and susceptible strains were observed and recorded,and the life table of the experimental populations was constituted. Results The bloodsucking rate of resistant strain was lower than that of susceptible strain and the difference was significant. The mortality of eggs of resistant strain was higher than that of susceptible strain and the difference was significant. The developmental duration of eggs,larvae and pupae were longer than that of susceptible strain and the difference was significant. The resistant strain was calculated to have fitness value of 0.66 relative to the susceptible strain. Conclusion The resistant strain was related to disadvantage of reproduction and development.