Effect of temperature on the sex ratio and life table parameters of the leek?( <scp>L1</scp> ) and tobacco?associated (T) <scp> <i>Thrips tabaci</i> </scp> lineages (Thysanoptera: Thripidae)

Temperature strongly affects insect biological response. Effects of temperature on the sex ratio, preoviposition, fecundity, egg hatchability rate, and adult longevity L1 T Thrips tabaci lineages were studied under laboratory conditions at three constant levels (15, 23, 30°C) cabbage tobacco leaf discs, respectively. Results showed that all tested life table parameters lineages. The proportion female's log-linearly increased as increased. Preoviposition period, longevity, rate reduced significantly with increasing temperature. In both lineages, lowest rates recorded 30°C highest 15°C. Mean fecundity 107.63 84.83 23°C, respectively, mean 19.88 70.82 15°C, was 15°C for 34.22 81.82 days Whereas, shortest (13.63 13.91 days) observed Our results demonstrated 23°C optimum among population T.