Predation Risk Effects of Harmonia axyridis on the Development and Fecundity of Periphyllus koelreuteriae

文献类型： 外文期刊

第一作者： Yang, Haibo

作者： Yang, Haibo;Du, Jiaoyi;Wang, Lei;Zhu, Pinhong;Li, Dingxu;Hu, Zhenjie;Huang, Jianrong

作者机构：

关键词： predator-prey interaction; non-consumptive effect; developmental stage-dependent; predation cues; laboratory experiments

期刊名称：INSECTS （ 影响因子：2.9； 五年影响因子：3.3 ）

ISSN：

年卷期： 2025 年 16 卷 7 期

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收录情况： SCI

摘要： In the scenario that requires the biological control of pests using predatory enemies, predators not only prey on pests directly but also can affect the population fitness of pests through indirect non-consumptive effects (predation risk effects). However, the impact of predation risk effects varies depending on the mode of stress imposed by natural enemies and the state of the stressed pests. Herein, we exposed aphids (Periphyllus koelreuteriae) at different stages to various cues from the multicolored Asian lady beetle (Harmonia axyridis) to assess the effects of different predation risks on P. koelreuteriae development and reproduction. We found that the effect of predation risk on aphid developmental time was clearly stage-dependent. When 1st-instar nymphs were exposed to predator cues, their developmental time was prolonged only in the early stages (1st-3rd instar nymphs). Similarly, when third-instar nymphs were stressed, only the current stage (third instar) showed a developmental delay, while fourth-instar nymphs and adult aphids were not significantly affected. Additionally, aphids at different stages perceive predation risk differently. Nymphs cannot recognize visual cues from predators, but can perceive odor cues. In contrast, adult aphids are sensitive to a variety of predator cues, including visual ones. Predation risk caused aphids to shorten their adult lifespan and reduce reproductive output, but it increased the proportion of diapause offspring. This study highlights the importance of considering how predation risk affects multiple life stages and physiological changes, which are important for gaining insights into the mechanisms of predator-prey interactions and for comprehensively assessing the ability of lady beetles to regulate aphid populations.

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