Enhanced yeast feeding following mating facilitates control of the invasive fruit pest Drosophila suzukii

The highly invasive spotted wing Drosophila Drosophila suzukii is a key pest of soft fruit and berries in Europe and North America, and development of control techniques is an urgent research challenge. Drosophila suzukii is widely associated with the yeast Hanseniaspora uvarum. Yeasts are symbionts of drosophilid flies and communicate with insects through volatile metabolites for spore dispersal. Accordingly, yeasts and behaviour-modifying chemicals produced by yeasts are prospective tools for environmentally sound insect management.
We first bioassayed flight attraction, feeding and oviposition of D. suzukii females in response to H. uvarum yeast and blueberries, which are a preferred host fruit. We then investigated the combined effect of yeast and insecticide on adult female oviposition behaviour and mortality towards the development of a yeast-based control method.
Following mating, attraction of female flies to blueberry and yeast odour cues was strongly enhanced. Yeast feeding ...

极具入侵性的斑翅果蝇（spotted wing Drosophila, *Drosophila suzukii*）是欧洲与北美软质水果及浆果类作物的主要害虫，其防控技术研发是当前亟待解决的科研难题。斑翅果蝇常与葡萄汁有孢汉逊酵母（*Hanseniaspora uvarum*）共生。酵母作为果蝇科昆虫的共生菌，可通过挥发性代谢产物与昆虫进行信号交流，以实现孢子传播。因此，酵母及其分泌的行为调控类化学物质有望成为环境友好型害虫防控手段。本研究首先针对斑翅果蝇雌虫，就其对葡萄汁有孢汉逊酵母以及偏好寄主蓝莓的飞行趋性、取食与产卵行为开展了生物测定；随后探究了酵母与杀虫剂联合作用对成虫雌虫产卵行为与死亡率的影响，以期开发基于酵母的害虫防控方法。交配完成后，雌果蝇对蓝莓与酵母气味的趋性显著增强。酵母取食……