Fall Webworm Host Plant Preferences Generate a Reduced Predation Enemy-Free Space in Its Interaction with Parasitoids
文献类型： 外文期刊
作者： Pan, Lina 1 ; Gao, Wenfang 1 ; Song, Zhiqin 1 ; Li, Xiaoyu 1 ; Wei, Yipeng 1 ; Qin, Guangyan 1 ; Hu, Yiping 1 ; Sun, Zeyang 1 ; Gao, Cuiqing 2 ; Bai, Penghua 3 ; Zhu, Gengping 4 ; Wang, Wenjie 4 ; Li, Min 1 ;
作者机构： 1.Tianjin Normal Univ, Tianjin Key Lab Conservat Utilizat Anim Divers, Tianjin 300387, Peoples R China
2.Nanjing Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Long Pan Rd, Nanjing 210037, Peoples R China
3.Tianjin Acad Agr Sci, Inst Plant Protect, Tianjin 300384, Peoples R China
4.Washington State Univ, Dept Entomol, Pullman, WA 99163 USA
关键词：
enemy-free space; tritrophic interactions; parasitoid;
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 8 期
页码：
收录情况： SCI
摘要： Plants and insects are developing strategies to avoid each other's defense systems. Host plants may release volatile compounds to attract the natural enemies of herbivores; insect pests may also select host plants that are deterrent to natural enemies to avoid such predation. Here we investigated whether the host plant preference of Hyphantria cunea correlates with the attractiveness of these plants to Chouioia cunea, a parasitoid wasp that serves as the primary natural enemy of H. cunea. We found Morus alba was the preferred host plant for female H. cunea. Although M. alba provided suboptimal nutritional value for H. cunea growth and development compared to other plants, it attracted fewer C. cunea relative to alternative host plants. Gas chromatography-mass spectrometry (GC-MS) coupled with gas chromatography-electroantennographic detection (GC-EAD) analysis identified six distinct compounds among the herbivore-induced plant volatiles (HIPVs) produced following H. cunea feeding. Notably, M. alba was the sole plant species that did not emit tridecane. These results suggest that H. cunea utilizes M. alba as a reduced predation enemy-free space, thereby minimizing parasitization by C. cunea. Our research emphasizes the importance of considering adaptive responses of herbivores within the context of multi-trophic relationships, rather than solely focusing on optimizing herbivore growth on the most nutritionally suitable plant host.
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