Electrophysiological and behavioural responses of the tea geometrid Ectropis obliqua (Lepidoptera: Geometridae) to volatiles from a non‐host plant, rosemary, Rosmarinus officinalis (Lamiaceae). Issue 1 (14th April 2014)

• Record Type: Journal Article
• Authors: Zhang, Zhengqun; Bian, Lei; Sun, Xiaoling; Luo, Zongxiu; Xin, Zhaojun; Luo, Fengjian; Chen, Zongmao
• Is Part Of: Pest management science. Volume 71:Issue 1(2015:Jan.)
• Page Start: 96
• Page End: 104
• Publication Date: 2014-04-14
• Subjects: Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.3771
• Languages: English
• ISSNs: 1526-498X

Abstract

<abstract abstract-type="main" id="ps3771-abs-0001"> <title>Abstract</title> <sec id="ps3771-sec-0001" sec-type="section"> <title>BACKGROUND</title> <p id="ps3771-para-0001">A plant‐based 'push‐pull' strategy for <italic>Ectropis obliqua</italic> (Prout) (Lepidoptera: Geometridae) is being developed using semiochemicals in the volatiles of <italic>Rosmarinus officinalis</italic> (Lamiaceae). The aim of this study was to identify and quantify the bioactive components within <italic>R. officinalis</italic> by gas chromatography–electroantennographic detection (GC‐EAD) and gas chromatography–mass spectrometry (GC‐MS), and to test the antennal and behavioural responses of <italic>E. obliqua</italic> to these chemicals. The emission dynamics of bioactive chemicals was also monitored.</p> </sec> <sec id="ps3771-sec-0002" sec-type="section"> <title>RESULTS</title> <p id="ps3771-para-0002">GC‐EAD experiments indicated that <italic>E. obliqua</italic> antennae responded to the following volatile compounds from <italic>R. officinalis</italic>: myrcene, <italic>α</italic>‐terpinene, <italic>γ</italic>‐terpinene, linalool, <italic>cis</italic>‐verbenol, camphor, <italic>α</italic>‐terpineol and verbenone, which were the minor constituents. Based on the dose‐dependent antennal and behavioural responses of <italic>E. obliqua</italic> to these bioactive compounds, myrcene, <italic>γ</italic>‐terpinene, linalool, <italic>cis</italic>‐verbenol, camphor and verbenone were found to play a key role in repelling the moths, and the mixture that included all eight compounds was significantly more effective. The maximum emissions of these semiochemicals occurred at nightfall.</p> </sec> <sec id="ps3771-sec-0003" sec-type="section"> <title>CONCLUSIONS</title> <p id="ps3771-para-0003">The specifically bioactive compounds in <italic>R. officinalis</italic> volatiles are responsible for repelling <italic>E. obliqua</italic> adults. Results indicate that <italic>R. officinalis</italic> should be considered as a potential behaviour‐modifying stimulus for 'push' components when developing 'push‐pull' strategies for control of <italic>E. obliqua</italic> using semiochemicals. © 2014 Society of Chemical Industry</p> </sec> </abstract>