Effects of leaf conditions and flight activity on the behaviour of Platypus quercivorus (Murayama) (Coleoptera: Platypodidae)
Effects of leaf conditions and flight activity on the behaviour of Platypus quercivorus (Murayama) (Coleoptera: Platypodidae)
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DOI：
10.1111/jen.12671
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发表时间：
2019-11-01
影响因子：
1.9
通讯作者：
Yamasaki, Michimasa
中科院分区：
文献类型：
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作者：
Duy Long Pham;Ito, Yasuto;Yamasaki, Michimasa
化学信息素在植物和昆虫相互作用中的重要作用已被广泛研究。人们认为，橡树产生的挥发物会吸引豚草甲虫鸭嘴兽（Murayama），这种甲虫会导致栎树枯萎病，造成广泛的损害。在本研究中，我们假设(a) quercivorus 被寄主树散发的叶子挥发物所吸引，(b) P. quercivorus 对叶子挥发物的反应受到飞行的影响。进行了一项实验，调查了不同性别的栎食栎在叶片退化的不同阶段（以切割后的不同天数为代表）对卷叶栎叶片挥发物的偏好。此外，通过在飞行磨机上测试甲虫飞行来评估飞行对两性的影响。结果表明，P. quercivorus 会被新鲜叶子散发的挥发物吸引，而不会被干燥叶子散发的挥发物吸引。这表明来自健康寄主的叶子挥发物是栎食栎的主要引诱剂。此外，随着飞行时间的增加，雄性对叶子挥发物的嗅觉反应增强，而雌性则观察到相反的模式。这些结果表明，性别不同的生态角色导致嗅觉反应的差异。
The important role of semiochemicals in the interactions between plants and insects has been extensively investigated. The volatiles produced by oak trees are thought to attract the ambrosia beetle Platypus quercivorus (Murayama), which causes wilt disease in Quercus trees, resulting in widespread damage. In the present study, we hypothesized that (a) P. quercivorus is attracted to the leaf volatiles emitted by host trees and (b) the response of P. quercivorus to leaf volatiles is affected by flight. An experiment was performed to survey the preferences of both sexes of P. quercivorus for the leaf volatiles of Quercus crispula Blume at various stages of leaf deterioration, represented by different number of days after cutting. Additionally, the effect of flight on both sexes was evaluated by testing the beetle flight on a flight mill. The results showed that P. quercivorus was attracted to the volatiles emitted from fresh leaves and was not attracted to those emitted from dry leaves. This suggests that leaf volatiles from healthy hosts are primary attractants for P. quercivorus. Further, males exhibited increased olfactory responses to leaf volatiles as their flight duration increased, whereas the opposite pattern was observed in females. These results suggest that the different ecological roles of the sexes contribute to differences in olfactory responses.