High temperature tolerance and thermal-adaptability plasticity of Asian corn borer (Ostrinia furnacalis Guenée) after a single extreme heat wave at the egg stage

• Published in: Journal of Asia-Pacific entomology Vol. 21; no. 3; pp. 1040 - 1047
• Main Authors: Zhou, Jin-cheng, Liu, Quan-quan, Han, Yong-xu, Dong, Hui
• Format: Journal Article
• Language: English
• Published: FAO Elsevier B.V 01.09.2018; Elsevier; 한국응용곤충학회
• Subjects: adults; Asian corn borer; Carry-over effects; climate change; death; females; hatching; heat; Heat tolerance; insect eggs; larvae; larval development; males; Ostrinia furnacalis; phytophagous insects; plasticity; pupae; risk factors; summer; survival rate; temperature; Thermal adaptability; thermal stress; 농수해양학; Thermal adaptability; Heat tolerance; Asian corn borer; Carry-over effects; Ostrinia furnacalis
• ISSN: 1226-8615; 1876-7990
• DOI: 10.1016/j.aspen.2018.07.024

Due to ongoing climate change, short-term extreme heat waves in the summer are expected to be more frequent. Insect eggs are sensitive to thermal stress. This raises the question of whether herbivore insects' thermal adaptability would be changed after a single extreme heat wave at the egg stage. In this study, we examined the developmental performance of Ostrinia furnacalis Guenée at 25 °C, 27 °C, 29 °C or 31 °C after a single extreme heat wave (42 °C) for 0 h (control), 1 h, 2 h, or 3 h at the egg stage. The results showed that O. furnacalis at the egg or larval stage was more sensitive to a single heat wave than it was at the pupae or adult stage. After a single heat wave, O. furnacalis showed a reduced egg-hatching rate or reduced larval survival rate, but the optimum temperature for egg hatching and larval survival was higher than that in the control. The upper temperature threshold and optimum temperature for larval development in the control were higher than that after a single extreme heat wave. Both male and female pupal weight decreased with increasing temperature, and pupal weight decreased faster in females than in males. The Cox proportional hazard model showed that when O. furnacalis developed at 25 °C, the instantaneous death risk of adults with a 3 h heat wave at the egg stage was higher than that of the control, but when O. furnacalis developed at 29 °C and 31 °C, the instantaneous death risk of adults after a heat wave was significantly lower than that of the control. Our study highlights the effect of a single heat wave on O. furnacalis eggs and the subsequent development of survival individuals. [Display omitted] •O. furnacalis eggs or larvae are susceptible to a extreme heat wave.•Extreme heat causes carry-over effects on larva or adult stage.•Optimum temperature for O. furnacalis is modified by a extreme heat wave.•O. furnacalis adult longevity varies with temperature and heat duration.