Abstract: Biological characteristics and population parameters of the high effective cypermethrinresistant (Rc) and trichlorphon-resistant (Rt) Aedes albopictus were significantly different compared with that of the susceptible strain (S). The difference between the two resistant strains was significant too. The greater fecundity, shorter time of life cycle, and the higher rate of female were detected in Rc strain than in Rt one. The latter had obvious defect in fitness. Hatching rate of both Rc and Rt strains were lower than that of the S strain. The imaginal mortality was Rt＞Rc＞S. The results show that the high effective cypermethrin could stimulate oviposition and enhance population growth of the mosquito.

Key words: Aedes albopictus, high effective cypermethrin, trichlorphon, population parameter, biological characteristics