UC Statewide IPM Program, University of California Agriculture and Natural Resources, 3800 Cornucopia Way, Modesto, CA, USA.
J Econ Entomol. 2022 Aug 10;115(4):1310-1313. doi: 10.1093/jee/toac074.
Spotted wing drosophila, Drosophila suzukii (Matsumura), is an important invasive insect pest in the United States. Spotted wing drosophila females have serrated ovipositor that enables them to deposit eggs inside healthy, ripening softskinned fruits. In many berry and fruit crops, spotted wing drosophila is primarily controlled using synthetic insecticides in the organophosphate, pyrethroid, and spinosyn groups. However, alternative, reduced-risk insecticides with short residuals are necessary to minimize the possibilities of insecticide resistance and address other negative effects of synthetic insecticides. Neem-based products as alternative plant-based insecticides have antifeedant, repellent, antiovipository, and molting interference effects on insects and have been shown to affect the oviposition activities of some tephritid flies. We conducted laboratory studies to evaluate the oviposition deterrent activities of selected neem-based insecticides that contain either azadirachtin, or CHENO, or a combination of both, on spotted wing drosophila using sweet cherry in California. The results of the study showed that some of the neem oil products could reduce the degree of spotted wing drosophila oviposition by half compared with the control.
美洲斑潜蝇，果蝇 suzukii（松村），是在美国的一个重要的入侵性害虫。美洲斑潜蝇的雌性有锯齿状的产卵器，使他们能够在健康、成熟的软皮水果内产卵。在许多浆果和水果作物中，美洲斑潜蝇主要通过使用有机磷、拟除虫菊酯和多杀菌素组中的合成杀虫剂来控制。然而，需要替代的、风险较低的杀虫剂，其残留时间短，以尽量减少杀虫剂抗性的可能性，并解决合成杀虫剂的其他负面影响。印楝素为基础的产品作为替代植物性杀虫剂，对昆虫具有拒食、驱避、抗产卵和蜕皮干扰作用，并已被证明会影响一些桔小实蝇的产卵活动。我们在加利福尼亚州使用甜樱桃进行了实验室研究，评估了含有印楝素、或 CHENO 或两者结合的选定印楝素基杀虫剂对美洲斑潜蝇的产卵驱避活性。研究结果表明，与对照相比，一些印楝油产品可以将美洲斑潜蝇的产卵程度降低一半。
