Feeding and oviposition deterrence of three secondary plant compounds and their 1:1 blends to adult female Frankliniella occidentalis Pergande (Thysanoptera: Thripidae) and the potential for habituation of the thrips to the pure compounds and the 1:1 blends at various concentrations were investigated. In choice assays, we tested dose‐dependent feeding and oviposition deterrence of the two fatty acid derivatives methyl jasmonate and cis‐jasmone, the phenylpropanoid allylanisole, and their blends when directly applied to bean leaf discs. The concentration required to reduce the feeding damage by 50% relative to the control treatment (FDC50) was lowest for cis‐jasmone and highest for allylanisole. The feeding deterrent effect of both jasmonates was increased when blended with allylanisole. Feeding deterrence and oviposition deterrence were strongly correlated. In no‐choice assays conducted over four consecutive days, we discovered that dilutions at low concentrations (FDC15) applied to bean leaves resulted in habituation to the deterrents, whereas no habituation occurred at higher concentrations (FDC50). We observed a tendency that the 1:1 blends reduce the probability that thrips habituate to the deterrent compounds. Our results may be useful in the development of integrated crop protection strategies with the implementation of allelochemicals as pest behaviour‐modifying agents.

中文翻译：

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西花蓟马的习性威慑植物化合物及其混合物

研究了三种次要植物化合物及其 1:1 混合物对成年雌性西花蓟马（缨翅目：蓟马科）的取食和产卵威慑作用，以及蓟马对纯化合物和不同浓度的 1:1 混合物的习惯潜力。在选择测定中，我们测试了两种脂肪酸衍生物茉莉酸甲酯和顺式茉莉酮、苯丙素烯丙甲醚及其混合物直接应用于豆叶盘时的剂量依赖性取食和产卵威慑作用。相对于对照处理（FDC50），将摄食损害减少 50% 所需的浓度，顺式茉莉酮最低，烯丙苯甲醚最高。当与烯丙苯甲醚混合时，两种茉莉酸酯的拒食作用均得到增强。摄食威慑和产卵威慑密切相关。在连续四天进行的无选择测定中，我们发现应用于豆叶的低浓度稀释液（FDC15）会导致对威慑物的习惯，而在较高浓度（FDC50）下则不会发生习惯。我们观察到一种趋势，即 1:1 混合物降低了蓟马习惯威慑化合物的可能性。我们的结果可能有助于制定综合作物保护策略，并实施化感化学作为害虫行为改变剂。