Biological Chemistry Department, Rothamsted Research, Harpenden, Herts, UK.
Pest Manag Sci. 2012 Oct;68(10):1419-29. doi: 10.1002/ps.3326. Epub 2012 Jun 14.
Two important pests of the sweet pepper, Capsicum annuum, are the peach potato aphid, Myzus persicae, and the glasshouse potato aphid, Aulacorthum solani. Current aphid control measures include the use of biological control agents, i.e., parasitic wasps, but with varying levels of success. One option to increase parasitoid efficiency is to activate plant defence. Therefore, sweet pepper plants were treated with the naturally occurring plant defence activator cis-jasmone, and its impact upon the behaviour and development of aphids and aphid parasitoids was investigated.
Growth rate studies revealed that the intrinsic rate of population increase of A. solani and M. persicae on sweet pepper plants treated with cis-jasmone (cJSP) was not affected compared with untreated plants (UnSP), but the positive behavioural response of alate M. persicae towards the volatile organic compounds (VOCs) from UnSP was eliminated by cis-jasmone treatment 48 h previously (cJSP48). In addition, the aphid parasitoid Aphidius ervi preferred VOCs from cJSP48 compared with UnSP, and a significant increase in foraging time was also observed on cJSP. Analysis of VOCs collected from cJSP48 revealed differences compared with UnSP.
There is evidence that treatment with cis-jasmone has the potential to improve protection of sweet pepper against insect pests.
甜椒，辣椒的两个重要害虫是桃蚜和烟粉虱。目前的蚜虫防治措施包括使用生物防治剂，即寄生蜂，但成功率不一。提高寄生蜂效率的一种选择是激活植物防御。因此，甜椒植株用天然存在的植物防御激活剂顺茉莉酮处理，并研究其对蚜虫和蚜虫寄生蜂行为和发育的影响。
生长率研究表明，用顺茉莉酮（cJSP）处理的甜椒植株上 A. solani 和 M. persicae 的内禀增长率与未处理的植株（UnSP）相比没有受到影响，但先前 48 小时用顺茉莉酮处理消除了有翅 M. persicae 对 UnSP 挥发有机化合物（VOCs）的积极行为反应（cJSP48）。此外，蚜虫寄生蜂 Aphidius ervi 更喜欢 cJSP48 的 VOCs，并且在 cJSP 上也观察到觅食时间的显著增加。从 cJSP48 收集的 VOCs 分析显示与 UnSP 存在差异。
有证据表明，用顺茉莉酮处理有可能改善对甜椒的虫害保护。
