Study on biological characteristics and population dynamics of deltamethrin-resistance and susceptible strains of Aedes albopictus in laboratory

Objective To compare biological characteristics and population dynamics of deltamethirn-resistance strain and susceptible strain of Aedes albopictus in the laboratory. Methods Biological characteristics of two mosquito strains such as reproduction, development and bloodsucking were observed and recorded in the laboratory, and the life tables of them were established. Results The hatching rate, pupation rate and emergence rate of resistance strain were lower than that of susceptible strains, decreasing about 16.67%, 8.92%, and 0.44% respectively, and the difference of them were significant(P0.05). The bloodsucking rate and the quantity of female filial generation reproduced by each female of resistance strain were also lower than that of susceptible strain. R0 and rm of resistance strain were 151.86 and 0.16 respectively, however that of susceptible strain were 177.18 and 0.20. Conclusion The resistance of Ae.albopictus to deltamethrin results in the decrease of adaptability to environment change and the disadvantage of reproduction.