Egger Barbara, Spangl Bernhard, Koschier Elisabeth Helene
Division of Plant Protection, Department of Crop Sciences, University of Natural Resources and Life Sciences (BOKU) Peter-Jordan-Straße 82, 1190, Vienna, Austria.
Institute of Applied Statistics and Computing (IASC), Department of Landscape, Spatial and Infrastructure Sciences, University of Natural Resources and Life Sciences (BOKU) Peter-Jordan-Straße 82, 1190, Vienna, Austria.
Entomol Exp Appl. 2016 Jan;158(1):78-86. doi: 10.1111/eea.12381. Epub 2015 Dec 12.
Behavioural responses of (Pergande) (Thysanoptera: Thripidae), a generalist, cell sap-feeding insect species with piercing-sucking mouthparts, after continuous exposure to two deterrent secondary plant compounds are investigated. We compared in choice assays on bean leaf discs, the settling, feeding, and oviposition preferences of females that had no experience with the two fatty acid derivatives methyl jasmonate and -jasmone before testing (naïve thrips) vs. females that had been exposed to the deterrent compounds before testing (experienced thrips). The thrips were exposed to the deterrents at low or high concentrations for varied time periods and subsequently tested on bean leaf discs treated with the respective deterrent at either a low or a high concentration. females avoided settling on the deterrent-treated bean leaf discs for an observation period of 6 h, independent of their previous experience. Our results demonstrate that feeding and oviposition deterrence of the jasmonates to the thrips were not altered by continuous exposure of the thrips to the jasmonates. Habituation was not induced, neither by exposure to the low concentration of the deterrents nor by exposure to the high concentration. These results indicate that the risk of habituation to two volatile deterrent compounds after repeated exposure is not evident in . This makes the two compounds potential candidates to be integrated in pest management strategies.
研究了具有刺吸式口器、以细胞液为食的多食性昆虫西花蓟马（Frankliniella occidentalis (Pergande)，缨翅目：蓟马科）在持续接触两种驱避性次生植物化合物后的行为反应。在菜豆叶片圆盘上进行的选择试验中，我们比较了在测试前未接触过两种脂肪酸衍生物茉莉酸甲酯和茉莉酮的雌性西花蓟马（无经验蓟马）与在测试前已接触过驱避化合物的雌性西花蓟马（有经验蓟马）的定居、取食和产卵偏好。将蓟马暴露于低浓度或高浓度的驱避剂中不同时间段，随后在分别用低浓度或高浓度相应驱避剂处理的菜豆叶片圆盘上进行测试。在6小时的观察期内，雌性西花蓟马均避免在经驱避剂处理的菜豆叶片圆盘上定居，无论其先前经验如何。我们的结果表明，蓟马持续接触茉莉酸盐不会改变茉莉酸盐对蓟马的取食和产卵的驱避作用。无论是暴露于低浓度的驱避剂还是高浓度的驱避剂，都不会诱导习惯化。这些结果表明，在西花蓟马中，重复接触两种挥发性驱避化合物后出现习惯化的风险并不明显。这使得这两种化合物有可能被纳入害虫管理策略中。
