Volatiles from cotton aphid (Aphis gossypii) infested plants attract the natural enemy Hippodamia variegata

文献类型： 外文期刊

第一作者： Yi, Chaoqun

作者： Yi, Chaoqun;Teng, Dong;Xie, Jiaoxin;Tang, Haoyu;Zhao, Danyang;Liu, Xiaoxu;Khashaveh, Adel;Zhang, Yongjun;Yi, Chaoqun;Tang, Haoyu;Ding, Wei;Teng, Dong;Xie, Jiaoxin;Zhao, Danyang;Liu, Xiaoxu;Liu, Tinghui

作者机构：

关键词： cotton aphid; cotton; HIPV; natural enemy; attraction

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： The Aphis gossypii is a major threat of cotton worldwide due to its short life cycle and rapid reproduction. Chemical control is the primary method used to manage the cotton aphid, which has significant environmental impacts. Therefore, prioritizing eco-friendly alternatives is essential for managing the cotton aphid. The ladybird, Hippodamia variegata, is a predominant predator of the cotton aphid. Its performance in cotton plantation is directly linked to chemical communication, where volatile compounds emitted from aphid-infested plants play important roles in successful predation. Here, we comprehensively studied the chemical interaction between the pest, natural enemy and host plants by analyzing the volatile profiles of aphid-infested cotton plants using gas chromatography-mass spectrometry (GC-MS). We then utilized the identified volatile compounds in electrophysiological recording (EAG) and behavioral assays. Through behavioral tests, we initially demonstrated the clear preference of both larvae and adults of H. variegata for aphid-infested plants. Subsequently, 13 compounds, namely alpha-pinene, cis-3-hexenyl acetate, 4-ethyl-1-octyn-3-ol, beta-ocimene, dodecane, E-beta-farnesene, decanal, methyl salicylate, beta-caryophyllene, alpha-humulene, farnesol, DMNT, and TMTT were identified from aphid-infested plants. All these compounds were electrophysiologically active and induced detectable EAG responses in larvae and adults. Y-tube olfactometer assays indicated that, with few exceptions for larvae, all identified chemicals were attractive to H. variegata, particularly at the highest tested concentration (100 mg/ml). The outcomes of this study establish a practical foundation for developing attractants for H. variegata and open avenues for potential advancements in aphid management strategies by understanding the details of chemical communication at a tritrophic level.

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