Response of economically important aphids to components of Hemizygia petiolata essential oil
Response of economically important aphids to components of Hemizygia petiolata essential oil
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DOI：
10.1002/ps.1102
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发表时间：
2005-11-01
影响因子：
4.1
通讯作者：
Wadhams, LJ
中科院分区：
文献类型：
--
作者：
Bruce, TJA;Birkett, MA;Wadhams, LJ
半边莲精油中含有高含量(70%)倍半萜(E)-β-法尼烯，这是许多重要经济种类的报警信息素。为了验证叶柄菜油作为(E)-β-法尼烯的来源在新的综合防治策略中的适用性，在室内和田间试验中研究了不同种类的害虫的行为反应。在告警信息素分析中，桃蚜和豌豆蚜对(E)-β-法尼烯的反应比预期的要低。结果表明，油中的次要成分(+)-双环吉马烯和(-)-吉马烯D分别对桃小实蝇和豌豆小蜂的报警反应有抑制作用。然而，在嗅觉仪的研究中，该油对豌豆根结线虫和麦长管蚜有直接的驱避作用，而且它不仅被(E)-β-法尼烯驱避，而且还被(-)-杰马林D驱除。此外，虽然它对桃小实蝇没有直接驱避作用，但它干扰了它对寄主植物刺激的引诱。在田间小区试验中，与对照小区相比，使用该油缓释剂处理的小区的稻纵卷叶蜂数量显著减少。(C)2005年化学工业学会。
The essential oil of Hemizygia petiolata Ashby (Lamiaceae) contains high levels (> 70%) of the sesquiterpene (E)-beta-farnesene, the alarm pheromone for many economically important aphid species. In order to test the suitability of H. petiolata oil as a source of (E)-beta-farnesene for use in new integrated aphid control strategies, behavioural responses of pest aphid species were studied in laboratory and field experiments. In alarm pheromone assays the peach-potato aphid, Myzus persicae Sulzer, and the pea aphid, Acyrthosiphon pisum (Harr), showed a lower level of response to the oil than expected given the high levels of (E)-beta-farnesene. It was shown that minor components in the oil, (+)-bicyclogermacrene and (-)-germacrene D, caused inhibition of the alarm response for M. persicae and A. pisum respectively. Nevertheless, in olfactometer studies the oil was directly repellent to A. pisum and the grain aphid, Sitobion avenae F. Sitobion avenae was not only repelled by (E)-beta-farnesene but also by (-)-germacrene D. Furthermore, although it was not directly repellent to M. persicae, the oil interfered with its attraction to host plant stimuli. In field plot experiments, numbers of A. pisum were significantly reduced in plots treated with a slow release formulation of the oil, when compared with control plots. (c) 2005 Society of Chemical Industry.