Babin Aurélie, Gatti Jean-Luc, Poirié Marylène
Université Côte d'Azur, INRAE, CNRS, Sophia Agrobiotech Institute (ISA), 06903 Sophia Antipolis, France.
R Soc Open Sci. 2023 Aug 30;10(8):230565. doi: 10.1098/rsos.230565. eCollection 2023 Aug.
Behavioural avoidance has obvious benefits for animals facing environmental stressors such as pathogen-contaminated foods. Most current bioinsecticides are based on the environmental and opportunistic bacterium () that kills targeted insect pests upon ingestion. While food and oviposition avoidance of bioinsecticide by targeted insect species was reported, this remained to be addressed in non-target organisms, especially those affected by chronic exposure to bioinsecticide such as species. Here, using a two-choice oviposition test, we showed that female flies of three species (four strains of , and ) avoided laying eggs in the presence of var. bioinsecticide, with potential benefits for the offspring and female's fitness. Avoidance occurred rapidly, regardless of the fraction of the bioinsecticide suspension (spores and toxin crystals versus soluble toxins/compounds) and independently of the female motivation for egg laying. Our results suggest that, in addition to recent findings of developmental and physiological alterations upon chronic exposure to non-target , this bioinsecticide may modify the competitive interactions between species in treated areas and the interactions with their associated natural enemies.
行为回避对面临环境压力源（如受病原体污染的食物）的动物具有明显益处。目前大多数生物杀虫剂基于环境兼机会性细菌（），其在被摄入后可杀死目标害虫。虽然已有报道称目标昆虫物种会避免食用和在含有生物杀虫剂的环境中产卵，但在非目标生物中这一情况仍有待研究，尤其是那些受长期接触生物杀虫剂影响的生物，如物种。在此，我们通过双选产卵试验表明，三种物种（四种品系的、和）的雌蝇在存在变种生物杀虫剂的情况下会避免产卵，这对后代和雌蝇的适应性可能具有益处。回避行为迅速发生，与生物杀虫剂悬浮液的成分（孢子和毒素晶体与可溶性毒素/化合物）无关，且与雌蝇的产卵动机无关。我们的研究结果表明，除了近期发现长期接触非目标会导致发育和生理改变外，这种生物杀虫剂可能会改变处理区域内物种之间的竞争相互作用以及它们与相关天敌之间的相互作用。
