Abstract The viburnum leaf beetle (VLB), Pyrrhalta viburni (Paykull), is an invasive chrysomelid in North America where it infests native Viburnum shrubs in woody areas and managed landscapes. Despite its invasive and destructive nature, little is known about the chemical ecology of this beetle, and efficient chemical lures for monitoring and trapping this insect have yet to be developed. Using two of the main host plants of VLB in its native range, Viburnum opulus L. (Caprifoliaceae) and V. lantana L., we examined the olfactory preferences of adult females of VLB under laboratory conditions and measured volatile emissions of Viburnum twigs with and without VLB damage. VLB females had a clear preference for V. opulus and V. lantana twigs compared to blank odor sources. In addition, twigs with foliar damage and fresh egg masses were found to be more attractive than noninfested twigs in V. opulus when VLB infestation was recent, but not when twigs had been infested for several weeks. Chemical analyses revealed consistent treatment-specific blends of compounds, which may be used for the elaboration of attractive lures. Future research should focus on the identification of these compounds and on exploring the olfactory preferences of VLB with Viburnum species present in North America.

中文翻译：

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入侵性害虫化学生态学的初步洞察：荚蒾叶甲虫（鞘翅目：Chrysomelidae）的嗅觉偏好

摘要 荚蒾叶甲虫 (VLB) Pyrrhalta viburni (Paykull) 是北美洲的一种侵入性菊科植物，它侵染木本地区和管理景观中的原生荚蒾灌木。尽管它具有侵入性和破坏性，但人们对这种甲虫的化学生态知之甚少，并且尚未开发出用于监测和诱捕这种昆虫的有效化学诱剂。使用 VLB 原生范围内的两种主要寄主植物 Viburnum opulus L. (Caprifoliaceae) 和 V. lantana L.，我们在实验室条件下检查了 VLB 成年雌性的嗅觉偏好，并测量了荚蒾枝条的挥发性排放物和无 VLB 损坏。与空白气味源相比，VLB 雌性对 V. opulus 和 V. lantana 树枝有明显的偏好。此外，当最近 V. opulus 受侵染时，发现具有叶面损伤和新鲜卵块的枝条比未侵染的枝条更有吸引力，但当枝条已经侵染数周时则不然。化学分析揭示了化合物的一致处理特定混合物，可用于制作有吸引力的诱饵。未来的研究应集中在这些化合物的鉴定上，并探索 VLB 与北美存在的 Viburnum 物种的嗅觉偏好。