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Effects of Short-Term High Temperatures on Survival and Reproduction of Trabala vishnou gigantina Yang (Lepidoptera: Lasiocampidae)

Effects of Short-Term High Temperatures on Survival and Reproduction of Trabala vishnou gigantina Yang (Lepidoptera: Lasiocampidae)

Yonghua Liu*, Xianhua Li, Xiongfei Yan, Gang Li, Caiyun Luo and Ying He

Key Laboratory of Ecological Restoration in Shanbei Mining Area and Key Laboratory of Plant Pest Control in Yulin City, Yulin University, Yulin 719000, P. R. China

*      Corresponding author: liuyonghuaa@126.com

ABSTRACT

The moth Trabala vishnou gigantina Yang is a leaf-eating pest, and there have been severe outbreaks of it in Hippophae rhamnoides plantations in North China. To study the effects of short-term high temperatures on its feeding, mating, longevity, and fecundity, T. vishnou gigantina were cultivated at 30, 35, and 40°C for 1, 2, and 4 h. The results showed that the different intensities and durations of the high temperatures had significant impacts on the moth’s survival and reproduction. With increased temperatures and durations of exposure, the development time of T. vishnou gigantina was shortened and then prolonged. At 30 and 35°C, with increased exposure time, the development time was shorter than that at 25°C, whereas it was significantly longer at 40°C. The increase in temperatures and treatment times resulted in gradual decrease in mating rate. With increased temperature, the average fecundity, fecundity rate, and average adult longevity (of both the males and females), gradually decreased. Furthermore, with increased treatment times, at the same temperatures, the average fecundity, fecundity rate, and average adult longevity (of both the males and females), also gradually decreased.In conclusion, T. vishnou gigantina is significantly impacted on survival and reproduction by short term high temperatures. This study is expected to provide a scientific basis for predicting the population dynamics in T. vishnou gigantina.
 

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Pakistan Journal of Zoology

December

Vol. 53, Iss. 6, Pages 2001-2521

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