Fly responses to food colour, orientation and toxic bait composition in Drosophila suzukii

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY
Rodrigo Lasa, Saide Aguas-Lanzagorta, Trevor Williams
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Abstract

Toxic baits comprising a combination of food attractants and a toxicant could contribute to the control of the spotted wing drosophila, Drosophila suzukii (Diptera: Drosophilidae), a major invasive pest of soft fruit and berries. Laboratory cage experiments revealed that flies of both sexes were significantly more attracted to dried red droplets of 0.3% sucrose solution and were more likely to consume red-coloured droplets compared to blue, green or colourless droplets. Flies of both sexes showed a tendency to feed on dried droplets placed on the floor of the cage rather than droplets presented upside-down on the roof or on the cage side-wall. When offered commercial insecticides (5–50 parts per million active ingredient) in dried sucrose solution, fly mortality of both sexes was highest in the spinosad treatment, lowest in abamectin and intermediate in deltamethrin and spinetoram-based products. Male flies had significantly higher mortality than females. A mixture of 25 ppm spinosad with 1.3% sucrose +1.3% corn syrup +1.3% glycerol (named 4% mixture) was consumed by female flies more than any of the components alone. Addition of 1% apple juice to the 4% mixture resulted in an additional increase in spinosad-induced mortality. In contrast, the addition of apple cider vinegar, increasing concentrations of apple juice (5%–10%), or the addition of the yeasts Saccharomyces cerevisiae or Hanseniaspora uvarum (5 × 106 cells/mL) did not increase fly mortality for reasons that were unclear. We conclude that the combination of 4% mixture +1% apple juice could prove to be a useful bait for the delivery of spinosad or other biorational insecticides for D. suzukii control, although this requires field testing in commercial fruit production settings.

苏氏果蝇对食物颜色、方向和毒饵成分的反应
由食物引诱剂和毒剂组合而成的毒饵有助于控制斑翅果蝇(双翅目:果蝇科),这是一种主要入侵软果和浆果的害虫。实验室笼子实验显示,与蓝色、绿色或无色液滴相比,雌雄蝇对 0.3%蔗糖溶液的红色干液滴的吸引力明显更大,更有可能吃掉红色液滴。雌雄蝇都倾向于取食放在笼子地板上的干液滴,而不是倒挂在笼顶或笼子侧壁上的液滴。当使用蔗糖干溶液中的商用杀虫剂(有效成分含量为百万分之 5 至 50)时,雌雄蝇的死亡率在施用刺槐噻的处理中最高,在施用阿维菌素的处理中最低,在施用溴氰菊酯和刺槐噻的处理中居中。雄蝇的死亡率明显高于雌蝇。雌蝇对 25 ppm 的 spinosad 与 1.3% 蔗糖 +1.3% 玉米糖浆 +1.3% 甘油的混合物(命名为 4% 混合物)的消耗量高于单独使用任何一种成分的消耗量。在 4% 的混合物中加入 1%的苹果汁会进一步增加刺槐蚜诱导的死亡率。相比之下,添加苹果醋、增加苹果汁浓度(5%-10%)或添加酵母菌 Saccharomyces cerevisiae 或 Hanseniaspora uvarum(5 × 106 cells/mL)并没有增加苍蝇死亡率,原因尚不清楚。我们的结论是,4% 的混合物+1% 的苹果汁组合可能会被证明是一种有用的诱饵,可用于施用丁螺环菌胺或其他生物杀虫剂来控制蝇蛆病,不过这还需要在商业水果生产环境中进行实地测试。
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来源期刊
CiteScore
3.40
自引率
5.30%
发文量
132
审稿时长
6 months
期刊介绍: The Journal of Applied Entomology publishes original articles on current research in applied entomology, including mites and spiders in terrestrial ecosystems. Submit your next manuscript for rapid publication: the average time is currently 6 months from submission to publication. With Journal of Applied Entomology''s dynamic article-by-article publication process, Early View, fully peer-reviewed and type-set articles are published online as soon as they complete, without waiting for full issue compilation.
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