Impact of heat waves on egg survival and biological performance across life stages in the Asian corn borer
Date
2023-01-02
Journal Title
Journal ISSN
Volume Title
Publisher
Entomologia Experimentalis et Applicata
Abstract
One of the many extreme events as a result of climate change is the frequent appearance of extraordinarily daily high temperatures that can directly drive an insect's adaptive response. Insects have complex life cycles that may uncouple temperature's effects in one stage from the physiology in the next. In this study we focused on the Asian corn borer (ACB), Ostrinia furnacalis (Guenée) (Lepidoptera: Crambidae), one of the most important pests of maize (corn) in Asia, investigated the consequences of eggs exposed to ecologically relevant heat shock regimes, simulating heat waves at extreme high temperature. This consisted of five 90-min heat treatments separated by two degrees that ranged from 37 to 45°C for three consecutive days compared to a constant temperature of 25°C. Temperature that triggered mortality was between 39 and 41°C. Egg hatching significantly declined when temperature was 41°C or higher. There was no egg hatching at 45°C. Developmental times were significantly prolonged and the larval growth rate became slower in treatments of 41 and 43°C. There were no significant differences in pupal mass, fecundity, and sex ratio among treatments. Life table parameters showed significant adverse effects at treatments of 41 and 43°C. Depending on the fitness response of the ACB, environmental heat waves can be classified into three categories based on temperature criteria, i.e., adaptable (35–39°C), critical (39–45°C), and fatal (≥45°C). The findings of the present study will serve as an important reference for forecasting the population dynamics of the ACB.
Description
This is the peer reviewed version of the following article: Quan, Y., Mason, C. E., He, K., Wang, Z. & Wei, H. (2023). Impact of heat waves on egg survival and biological performance across life stages in the Asian corn borer. Entomologia Experimentalis et Applicata, 171, 129– 137. https://doi.org/10.1111/eea.13262, which has been published in final form at https://doi.org/10.1111/eea.13262. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. This article will be embargoed until 01/02/2024.
Keywords
developmental time, fecundity, heat shock, life table, Ostrinia furnacalis, sex ratio, Lepidoptera, Crambidae, maize pest, heat treatment
Citation
Quan, Y., Mason, C. E., He, K., Wang, Z. & Wei, H. (2023). Impact of heat waves on egg survival and biological performance across life stages in the Asian corn borer. Entomologia Experimentalis et Applicata, 171, 129– 137. https://doi.org/10.1111/eea.13262