The population parameters and biological characteristics of high effective cypermethrin resistance and trichlorphon resistance strains of Aedes albopictus

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 RtRcS. The results show that the high effective cypermethrin could stimulate oviposition and enhance population growth of the mosquito.