Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
University of Missouri, Division of Plant Sciences, Columbia, MO, 65211, USA.
Sci Rep. 2019 Jul 22;9(1):10574. doi: 10.1038/s41598-019-47081-z.
Semiochemicals play a pivotal role in the location, evaluation, and utilization of hosts by herbivorous insects. Mixtures of host plant-derived compounds are often required to elicit appropriate levels of response to olfactory stimuli. In multiple-choice bioassays, we characterized the response of adult Drosophila suzukii to foliage- and fruit-based synthetic compounds tested alone and in association with grape and tart cherry juices, and assessed whether synergistic interactions among olfactory stimuli are involved in the olfactory-driven behavior of D. suzukii. Our results established (1) significant attraction of females (but not males) to β-cyclocitral and isoamyl acetate when tested singly, (2) the presence of a synergistic interaction between β-cyclocitral and cherry juice only for females, and (3) the presence of a synergistic interaction between β-cyclocitral and isoamyl acetate but only in the case of males. Our findings increase our understanding of male and female D. suzukii olfactory responses to synthetic compounds and fruit juices as sources of attractants. Combinations of foliage- and fruit-based compounds may be needed to increase SWD attraction.
化学生态物质在植食性昆虫对寄主的定位、评估和利用中起着关键作用。通常需要混合植物源化合物以引起对嗅觉刺激的适当水平的反应。在多项选择生物测定中，我们描述了成年果蝇对单独和与葡萄和酸樱桃汁混合的基于叶和基于果实的合成化合物的反应，并评估了嗅觉刺激之间的协同相互作用是否参与了果蝇的嗅觉驱动行为。我们的研究结果确定了以下内容：(1)β-环柠檬醛和乙酸异戊酯单独测试时，雌性（但不是雄性）显著被吸引；(2)β-环柠檬醛和樱桃汁之间存在协同作用，仅对雌性有效；(3)β-环柠檬醛和乙酸异戊酯之间存在协同作用，但仅对雄性有效。我们的发现增加了我们对雄性和雌性果蝇对合成化合物和水果汁作为引诱剂的嗅觉反应的理解。可能需要组合叶和果实基化合物以增加 SWD 的吸引力。
