The invasion of Hyphantria cunea, also known as “smokeless fires”, poses a significant threat to artificial and natural forest resources. Therefore, it is urgent to adopt safe and effective control strategies to prevent the spread of and harm caused by of H. cunea. In this study, potential repellent active ingredients were screened from the volatiles of Larix gmelinii and Syringa oblata, the non-preferred hosts of H. cunea. The sensitive substances were identified in the H. cunea larvae and adults through electroantennographic (EAG) and behavioral responses. The results showed that fresh branches with leaves of L. gmelinii and S. oblata had significant repellent effects on the fifth and 6th instar larvae and virgin females, which were mainly related to α-pinene and (+)-limonene and other volatile substances. 100 μL/mL α-pinene and (+)-limonene were found to significantly stimulate the olfactory nervous system of H. cunea virgin females and male adults, and could induce significant EAG responses. They could induce avoidance behavior of 4-6th instar larvae, virgin females, and male adults, and also inhibit the selection behavior of fifth and 6th instar larvae and adults to Salix matsudana, the preferred food host. So α-pinene and (+)-limonene can be used as repellents for larvae and adults of H. cunea, with an effective concentration of 100 μL/mL. The two terpenes can induce avoidance behavior of H. cunea during the larval feeding period and before the mating of adults, thus inhibiting the outbreak and spread of the pest, providing an important control strategy for the integrated management of H. cunea.

Hyphantria cunea 的入侵，也被称为“无烟火灾”，对人工和天然森林资源构成重大威胁。因此，迫切需要采取安全有效的防治策略来防止楔形毛蠹虫的传播和危害。在这项研究中，从 H. cunea 的非首选宿主 Larix gmelinii 和 Syringa oblata 的挥发物中筛选出潜在的驱虫活性成分。通过电图（EAG）和行为反应在楔形H. cunea幼虫和成虫中鉴定出敏感物质。结果表明，带有 L. gmelinii 和 S. oblata 叶的新鲜枝条对 5 龄和 6 龄幼虫和处女雌虫具有显著的驱避作用，主要与 α-蒎烯和 （+）-柠檬烯等挥发性物质有关。发现 100 μL/mL α-蒎烯和 （+）-柠檬烯可显着刺激 H. cunea 处女雌性和雄性成虫的嗅觉神经系统，并可诱导显着的 EAG 反应。它们可以诱导 4-6 龄幼虫、处女雌虫和雄成虫的回避行为，还可以抑制 5 龄和 6 龄幼虫和成虫对首选食物宿主 Salix matsudana 的选择行为。因此，α-蒎烯和 （+）-柠檬烯可用作楔形藻幼虫和成虫的驱虫剂，有效浓度为 100 μL/mL。两种萜烯可诱导楔蝈在幼虫取食期和成虫交配前的避让行为，从而抑制害虫的爆发和传播，为楠萜的综合治理提供重要的防治策略。 库尼亚。