Effect of temperature on development and reproduction of Tetranychus kanzawai (Tetranychidae) fed on apple leaves

Abstract

ABSTRACTThe effect of six constant temperatures (15°C, 20°C, 25°C, 30°C, 35°C and 37.5°C) on life table parameters of Tetranychus kanzawai Kishida (Tetranychidae) fed on apple (Malus domestica Borkh.: Rosaceae) leaves was studied. Total immature developmental time of females at the mentioned temperatures was 38.02, 21.80, 10.99, 8.42, 6.65 and 7.35 days, respectively. The estimated k for the total developmental time of females and males using the linear model was 156.25 and 153.84 DD, respectively. The lower thermal threshold for total immature stages of females was calculated as 11.56°C and 11.41°C by linear and Lactin models, respectively. Using SSI model, the estimated TL, TH and TФ for total immature stages of females were 9.02°C, 37.15°C, and 22.50°C, respectively. The intrinsic rate of increase (r), increased with the raising of temperature from 0.043 day−1 at 15°C to 0.252 day−1 at 30°C, then decreased to 0.134 day−1 at 37.5°C. The presented information in this study can be used to predict the occurrence, number of generations, and population dynamics of this pest.