The conservation of terrestrial ecosystems depends largely on the preservation of pollinators, mainly bees. Stingless bees are among the main pollinators of native plants and crops in tropical regions, where they can be exposed to agrochemicals while foraging on contaminated flowers. In the present study, we investigated the effects on stingless bees of both a commonly used insecticide and herbicide in Brazil. Plebeia lucii Moure, 2004 (Apidae: Meliponini) foragers were orally chronically exposed to food contaminated with different concentrations of commercial formulations of the insecticide acephate or the herbicide glyphosate. Bee mortality increased with increasing agrochemical concentrations. Depending on its concentration, the acephate-based formulation reduced the lifespan and impaired the flight ability of bees. The glyphosate-based formulation was toxic only under unrealistic concentrations. Our results demonstrate that realistic concentrations of acephate-based insecticides harm the survival and alter the mobility of stingless bees. The ingestion of glyphosate-based herbicides was safe for forager bees under realistic concentrations.

陆地生态系统的保护在很大程度上取决于传粉媒介（主要是蜜蜂）的保护。无刺蜂是热带地区本土植物和农作物的主要授粉者之一，它们在采食受污染的花朵时可能会接触到农用化学品。在本研究中，我们调查了巴西常用的杀虫剂和除草剂对无刺蜜蜂的影响。Plebeia lucii Moure, 2004（蜜蜂科：Meliponini）采集者长期经口接触被不同浓度的杀虫剂乙酰甲胺磷或除草剂草甘膦商业制剂污染的食物。蜜蜂死亡率随着农用化学品浓度的增加而增加。根据其浓度，基于乙酰甲胺磷的配方会缩短蜜蜂的寿命并损害其飞行能力。基于草甘膦的制剂仅在不切实际的浓度下才有毒。我们的结果表明，乙酰甲胺磷杀虫剂的实际浓度会损害无刺蜂的生存并改变其活动能力。在实际浓度下，摄入草甘膦除草剂对于采摘蜂来说是安全的。