Koczor Sándor, Szentkirályi Ferenc, Vuts József, Caulfield John C, Withall David M, Pickett John A, Birkett Michael A, Tóth Miklós
Plant Protection Institute, Centre for Agricultural Research, HAS, H-1022 Herman Ottó u. 15, Budapest, Hungary.
Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK.
J Chem Ecol. 2018 Feb;44(2):137-146. doi: 10.1007/s10886-017-0920-2. Epub 2018 Jan 26.
Green lacewings (Chrysopidae) are predators of soft-bodied pest insects and are among the most important biological control agents in crop protection. Chrysopa spp. are of special importance since, unlike most green lacewing species, adults are also predatory. The current study was undertaken in search of Chrysopa formosa compounds with semiochemical activity. Using coupled gas chromatography-electroantennography (GC-EAG), head and thorax extracts of C. formosa elicited EAG responses to a compound subsequently identified by coupled GC/mass spectrometry, microchemistry, chemical synthesis and GC peak enhancement as (Z)-4-tridecene. In field experiments, this compound decreased attraction of adult C. formosa to (1R,4aS,7S,7aR)-nepetalactol and that of Chrysoperla carnea species-complex to a ternary floral lure, with the inhibitory effect found to be dose-dependent. Our results suggest that (Z)-4-tridecene may serve as a general warning signal among multiple green lacewing species. Perspectives for potential practical applications are discussed.
草蛉（草蛉科）是软体害虫的捕食者，也是作物保护中最重要的生物防治剂之一。中华草蛉属尤为重要，因为与大多数草蛉物种不同，其成虫也具有捕食性。本研究旨在寻找具有化学生态活性的中华草蛉化合物。通过气相色谱 - 触角电位联用技术（GC - EAG），中华草蛉的头部和胸部提取物对一种化合物产生了EAG反应，该化合物随后通过气相色谱/质谱联用、微量化学、化学合成和气相色谱峰增强鉴定为（Z）-4 - 十三碳烯。在田间试验中，该化合物降低了中华草蛉成虫对（1R，4aS，7S，7aR）-荆芥内酯的吸引力，以及普通草蛉复合种对三元花香诱剂的吸引力，且抑制作用呈剂量依赖性。我们的结果表明，（Z）-4 - 十三碳烯可能作为多种草蛉物种之间的通用警告信号。文中还讨论了潜在实际应用的前景。
