Effect of temperature on the population growth of Tetranychus urticae in laboratory
Author of the article: LIANG Yan* , ZHOU Yu-Shu** , LIU Hong-Min
Author's Workplace：College Plant Protection, Shenyang Agricultural University , Shenyang 110161, China
Key Words：Tetranychus urticae, temperature, cherry, life table
Abstract：The two spotted spider mite, Tetranychus urticae Koch, was fed with cherry leaves in laboratory. Life tables of laboratory population were constructed at 15, 20, 25, 30, and 35℃, respectively. The results showed that the developmental rate increased with the increasing temperature from 15℃to 35℃, and the relationship could be simulated by Log istic model. The threshold temperatures and the effective accumulated temperatures required for the whole generation were 11.85 and 170.39 degree day, respectively. According to the life tables of the laboratory population, the intrinsic rate of increase( rm ) , net reproductive rate( R0 ) , finite rate of increase(λ) , mean generation time (T) , and days for population to double( t) were established at different temperature.