Drosophila suzukii, spotted-wing drosophila (SWD), is a fly pest of small fruits and cherries often managed by chemical insecticides, and finding a convenient, human-safe alternative is a challenge. Erythritol, a non-caloric sugar, is safe for humans and toxic to D. suzukii by causing an osmotic imbalance. Combining erythritol with sucrose as a phagostimulant can enhance fly mortality. However, sucrose is sticky when applied on plants and provides flies with nutritional carbohydrate if a non-lethal dose is ingested. Therefore, our objectives were to find a sucrose alternative, a non-caloric sugar that also has phagostimulative properties, where the formulation will enhance mortality, and reduce daily oviposition rates before females die. Through capillary no-choice and choice experiments, flies fed on 0.1 M sucralose (Sul) readily, and flies consumed more 1.5 M erythritol: 0.1 M sucralose (E:Sul) formulation than erythritol alone. In eleven different mortality assays, E:Sul induced mortality as did the 1.5 M erythritol: 0.5 M sucrose (E:S) formulation, while E:Sul was more successful than E:S when D. suzukii could also drink water to offset water loss. Sucralose (0.1 M) itself had modest insecticidal properties, but when combined with erythritol it increased the insecticidal effect. Both E:Sul and E:S formulations reduced oviposition when it was directly fed to D. suzukii in a cotton wick or applied on blueberry fruit. The latter suggests that the sugary coating on fruits has a deterrent effect. Given the potential of E:Sul, additional studies on the effect of sucralose on fly osmolar regulation, sugar metabolism, and field efficacy trials are underway to provide growers an efficacious tool.

Drosophila suzukii，即斑点翅果蝇 (SWD)，是一种通常由化学杀虫剂管理的小型水果和樱桃果蝇害虫，找到一种方便、对人类安全的替代品是一项挑战。赤藓糖醇是一种无热量的糖，对人类是安全的，对D. suzukii有毒通过导致渗透失衡。将赤藓糖醇与蔗糖作为诱食剂结合使用可以提高苍蝇的死亡率。然而，蔗糖在植物上使用时具有粘性，如果摄入非致死剂量，则可为果蝇提供营养碳水化合物。因此，我们的目标是找到一种蔗糖替代品，一种也具有吞噬特性的无热量糖，该配方将提高死亡率，并在雌性死亡前降低每日排卵率。通过毛细血管无选择和选择实验，苍蝇很容易以 0.1 M 三氯蔗糖 (Sul) 为食，而且苍蝇消耗的 1.5 M 赤藓糖醇：0.1 M 三氯蔗糖 (E:Sul) 制剂比单独使用赤藓糖醇多。在 11 种不同的死亡率测定中，E:Sul 与 1.5 M 赤藓糖醇：0.5 M 蔗糖 (E:S) 制剂一样诱导死亡率，而 E:Sul 比 E:S 更成功D. suzukii也可以喝水来抵消水分流失。三氯蔗糖 (0.1 M) 本身具有适度的杀虫特性，但当与赤藓糖醇结合时，它会增加杀虫效果。当 E:Sul 和 E:S 配方直接喂给棉芯中的D. suzukii或应用于蓝莓果实时，都会减少产卵。后者表明水果上的含糖涂层具有威慑作用。鉴于 E:Sul 的潜力，关于三氯蔗糖对果蝇渗透压调节、糖代谢和田间功效试验的影响的其他研究正在进行中，以为种植者提供一种有效的工具。