Pesticides have been described as a major cause of bee mortality, and thus are predictors of population decline and decrease in pollination services. Standardized tests with Apis mellifera are already common, and there is a need to create adequate parameters for the native solitary and eusocial species of stingless bees. In this study, we evaluated lethal dosages (LD₅₀ and LD₉₀), lethal time (LT), and sub-lethal effects (SLE) of two pesticides used in soybean crops, abamectin, and acetamiprid, in Scaptotrigona aff. xanthotricha. All tests were performed through contact poisoning. The LD₅₀ and LD₉₀ for acetamiprid were higher than those obtained for abamectin. Survival analysis of S. aff. xanthotricha exposed to LD₉₀ indicated significant differences between pesticides. The LT₅₀ under abamectin (8.25 hours) was significantly lower than acetamiprid (14.25 hours). Considering the PER tests, our results suggest that positive responses to food offerings were reduced by pesticide effects. It was also observed that only the acetamiprid affected the locomotion of the bees. Our results revealed that both pesticides are highly toxic to S. aff. xanthotricha and that acetamiprid was the most toxic for all parameters evaluated.

农药已被描述为蜜蜂死亡的主要原因，因此是人口下降和授粉服务减少的预测因素。蜜蜂的标准化测试已经很普遍，并且需要为本地的独居和无刺蜜蜂的真社会物种创建足够的参数。在这项研究中，我们评估了大豆作物中使用的两种杀虫剂阿维菌素和啶虫脒在Scaptotrigona aff 中的致死剂量（LD ₅₀和 LD ₉₀）、致死时间（LT）和亚致死效应（SLE）。黄花菜。所有测试均通过接触中毒进行。LD ₅₀和 LD ₉₀啶虫脒的含量高于阿维菌素的含量。S. aff 的生存分析。xanthotricha暴露于 LD ₉₀表明农药之间存在显着差异。阿维菌素作用下的 LT ₅₀（8.25 小时）显着低于啶虫脒（14.25 小时）。考虑到 PER 测试，我们的结果表明，杀虫剂效应降低了对食品的积极反应。还观察到只有啶虫脒影响蜜蜂的运动。我们的结果表明，这两种农药对S. aff都具有高毒性。xanthotricha和啶虫脒在所有评估参数中毒性最大。