Mermer Serhan, Tait Gabriella, Pfab Ferdinand, Mirandola Enrico, Bozaric Aleksandar, Thomas Canessa D, Moeller Maxwell, Oppenheimer Katherine G, Xue Lan, Wang Lu, Walton Vaughn M
Oregon State University, Department of Horticulture, 4017 Agriculture and Life Sciences Building, Corvallis, OR, 97331, USA.
University of California, Santa Barbara, Department of Ecology, Evolution and Marine Biology, Santa Barbara, CL, 93106, USA.
Environ Entomol. 2022 Apr 22;51(2):413-420. doi: 10.1093/ee/nvac002.
Drosophila suzukii (Matsumura), spotted-wing drosophila, is a major pest in small fruit crops including highbush blueberry. Controlling D. suzukii is challenging and chemical control is the main method to manage D. suzukii populations. Growers have expressed interest in using micro-sprinklers as an alternative method to apply insecticides. The current study aimed to evaluate if insecticide applications using micro-sprinklers can be used as an alternative method to protect the fruit from D. suzukii egg-laying. Modeling was used as an additional tool to parameterize the relative insecticide efficacy on oviposition. Field measurements of different treatments were conducted over periods of eleven days on commercial-standard highbush blueberry. Cyantraniliprole and spinetoram were applied using both a micro-sprinkler and a backpack sprayer. Treatments of Chromobacterium subtsugae and zeta-cypermethrin were only applied using a backpack sprayer. Both cyantraniliprole and spinetoram treatments resulted in moderate suppression of D. suzukii egg-laying. No statistical significance was found between micro-sprinkler and backpack sprayer applications for these two insecticides. Zeta-cypermethrin treatments using a backpack sprayer resulted in the most significant suppression of D. suzukii egg-laying over eleven days, while C. subtsugae was less effective at preventing D. suzukii egg-laying. Modeling simulations estimate the impact of the control methods on D. suzukii populations dynamics and simulation outputs indicated that backpack sprayers reduced D. suzukii populations at more pronounced levels compared to micro-sprinkler applications. The present study indicates that there is an underlying value of micro-sprinkler systems as an alternative and rapid spray application technique to help suppress D. suzukii pest populations during high-pressure periods in highbush blueberry production.
铃木果蝇（松村），即斑翅果蝇，是包括高丛蓝莓在内的小浆果作物的主要害虫。控制铃木果蝇具有挑战性，化学防治是管理铃木果蝇种群的主要方法。种植者对使用微喷灌器作为施用杀虫剂的替代方法表示出兴趣。当前的研究旨在评估使用微喷灌器施用杀虫剂是否可作为一种替代方法来保护果实免受铃木果蝇产卵侵害。建模被用作一种额外工具来确定杀虫剂对产卵的相对功效。在商业标准的高丛蓝莓上，对不同处理进行了为期11天的田间测量。使用微喷灌器和背负式喷雾器施用了氰虫酰胺和多杀霉素。仅使用背负式喷雾器施用了枯草芽孢杆菌和高效氯氰菊酯处理。氰虫酰胺和多杀霉素处理均对铃木果蝇产卵有适度抑制作用。对于这两种杀虫剂，微喷灌器和背负式喷雾器施用之间未发现统计学显著差异。使用背负式喷雾器的高效氯氰菊酯处理在11天内对铃木果蝇产卵的抑制作用最为显著，而枯草芽孢杆菌在防止铃木果蝇产卵方面效果较差。建模模拟估计了控制方法对铃木果蝇种群动态的影响，模拟结果表明，与微喷灌器施用相比，背负式喷雾器能更显著地减少铃木果蝇种群数量。本研究表明，微喷灌系统作为一种替代且快速的喷雾施用技术具有潜在价值，有助于在高丛蓝莓生产的高压时期抑制铃木果蝇害虫种群数量。
