Las abejas sin aguijón (Hymenoptera: Apidae, Meloponini) hacen parte fundamental del ecosistema, ofreciendo el servicio de polinización y diversificación genética de las especies, además de proporcionar miel y cera para los seres humanos. Key words: pollination, stingless bees, Meliponini, pesticide risk, toxicology. We concluded that it is essential to use tools and practices that reduce the risk, and perform toxicological evaluations of new and existing pesticides on stingless bees. Although further studies are required to calculate the real risk of the two compounds, the results showed an evident susceptibility of both species. Comparisons with the LD 50s of other stingless bees and Apis mellifera were realized. The oral and topical LD 50 was obtained by Probit analysis. The aim of this study was to evaluate the toxicity of the insecticides thiamethoxam and fipronil, which are used in agriculture in several countries in the tropical and subtropical belt in order to establish the risk that these products represent to the survival of these two species. Currently these and other species have been exposed to agronomic practices, among which the use of synthetic pesticides used for crop protection stands out.
Tetragonisca angustula and Scaptotrigona xanthotricha are species that have been used since ancient times for beekeeping. Stingless bees (Hymenoptera: Apidae, Meliponini) have crucial roles in the ecosystem, offering pollination service and contributing to genetic diversity of species, and also providing honey and wax to humankind.
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