›› 2013, Vol. 56 ›› Issue (3): 276-285.doi:

• RESEARCH PAPERS • Previous Articles     Next Articles

Effects of brief exposure to high temperature on Tetranychus turkestani and T. truncatus (Acari: Tetranychidae)

YANG Shuai1, ZHAO Bing-Mei2, LI Guang-Yun1, HU Su-Li1, GUO Yan-Lan1, ZHANG Jian-Ping1,*   

  1. (1. College of Agriculture, Shihezi University, Shihezi, Xinjiang 832003, China; 2. Agricultural Technology Extension Centre, Xinjiang Production and Construction Corps, Urumqi 830000, China)
  • Online:2013-03-20 Published:2013-03-20

Abstract: 【Aim】 In order to determine the influence of high temperature shock on the survival characteristics and population dynamics of Tetranychus turkestani and T. truncatus.【Methods】 The egg hatching rate, survival rate and developmental duration were investigated after the eggs, larvae and adults of the two mites were exposed to high temperature (38℃, 42℃ and 46℃) for 2-6 h . 【Results】 The survival rate of the treated eggs and larvae decreased with the increase of exposure temperature and treatment time. The high temperature shock showed no influence on the survival rate, pre-oviposition period, oviposition period and fecundity of the treated male mites, but significantly decreased the hatching rate of their eggs. The egg hatching rates of T. turkestani and T. truncatus exposed to 46℃ for 6 h decreased by 15.5% and 18.0%, respectively. 【Conclusion】 High temperature exposure has significant effects on the egg hatching rates, survival rates and developmental duration of T. turkestani and T. truncatus, but has no effect on the longevity and reproduction of their female adults, and T. turkestani has stronger adaptability to high temperature than T. truncatus.

Key words:  Tetranychus turkestani, Tetranychus truncatus, high temperature exposure, survival, development, reproduction