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Herbivore-induced plant volatiles enhance field-level parasitism of the mirid bug Apolygus lucorum

文献类型: 外文期刊

作者: Xiu, Chunli 1 ; Dai, Weijian 1 ; Pan, Hongsheng 1 ; Zhang, Wei 1 ; Luo, Shuping 1 ; Wyckhuys, Kris A. G. 1 ; Yang, Yiz 1 ;

作者机构: 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

2.Yangzhou Univ, Coll Hort & Plant Protect, Yangzhou 225007, Jiangsu, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Plant Protect, Urumqi 830091, Peoples R China

关键词: Mirid bug; Parasitoid wasp; Herbivore-induced plant volatiles; Electrophysiological responses; Behavioral responses; Parasitic rates

期刊名称:BIOLOGICAL CONTROL ( 影响因子:3.687; 五年影响因子:3.962 )

ISSN: 1049-9644

年卷期: 2019 年 135 卷

页码:

收录情况: SCI

摘要: In China, the braconid wasp Peristenus spretus Chen & van Achterberg (Hymenoptera: Braconidae) is a native endoparasitoid of the mirid bug Apolygus lucorum (Meyer-Mir) (Hemiptera: Miridae). Castor bean (Ricinus communis L.) is a preferred host plant of A. lucorum, and P. spretus adults are attracted to its herbivore-damaged flowering plants. Here, we used headspace collection to sample the volatiles emitted by A. lucorum-damaged flowering R. communis plants, and employed gas chromatography-electroantennography (GC-EAD) to identify two electrophysiologically-active compounds. Active compounds were identified as m-cymene and 4'-ethylacetophenone. Electrophysiological activities were confirmed by EAG, with a gradient of five doses of each compound eliciting significant antennal responses. Next, in Y-tube olfactometer bioassays, female P. spretus were attracted to two synthetic volatile compounds at two different concentrations (10 mg/ml and 100 mg/ml). Under field conditions, A. lucorum parasitism rates - as recorded in volatile-baited barrel traps - for the two compounds were significantly higher than those for mineral oil (control). Our findings emphasize the important role of herbivore-induced plant volatiles in the P. spretus host selection process, and provide a potential way to enhance in-field parasitoid populations and improve biological control of A. lucorum.

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