Effects of brief exposure of Neoseiulus bicaudus Wainstein to high temperature
Author of the article:LI Yong-Tao1, 2** LIU Min1, 2 PAN Yun-Fei1, 2 ZHANG Yan-Nan1, 2 ZHANG Jian-Ping1, 2***
Author's Workplace:1. College of Agricultural, Shihezi University, Shihezi 832000, China; 2. Key Laboratory at Universities of Xingjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resource Utilization, Shihezi 832003, China
Key Words:Neoseiulus bicaudus, high temperature exposure, development and reproduction
Abstract: [Objectives] The effect of brief exposure to high temperature on the development and population dynamics of Neoseiulus bicaudus Wainstein was studied. [Methods] The hatching rate, egg survival rate and life history parameters of adults were investigated after eggs and adults were exposed to temperatures of 38℃, 42℃ and 46℃ , for 2, 4 and 6 h, respectively. [Results] Hatching rates decreased at higher temperatures and with increased duration of exposure to higher temperatures. The lowest hatching rate was observed when eggs were exposed to 46℃ for 2 h. No eggs kept at 46℃ for 4 h or 6 h, hatched. Female developmental duration increased significantly with temperature from 38℃ to 46℃. Female fecundity declined, and oviposition period and longevity shortened, following exposure to higher temperatures and with increased duration of exposure to these. The lowest fecundity and shortest oviposition period were observed in females kept at 42℃ for 2 h. Females exposed to 38℃ for 6 h had the shortest lifespan, which was 14.68 d. [Conclusion] Brief exposure to high temperature has a significant effect on the hatching rate, survivorship, development, fecundity, and longevity, of female N. bicaudus.