Cupins como objetos de investigação do efeito do uso de agrotóxicos sobre o ambiente

Abstract

Brazil stands out as the country that consumes the most pesticides in the world and among the most consumed and commercialized pesticides stand out the herbicides. Given the lack of knowledge about the impacts that pesticides, especially glyphosate, have on the environment and organisms, this study aimed to investigate the anthropogenic effects of pesticides on termites and the environment. First we seek to determine the temporal trend of published work on the toxic effects of glyphosate on the environment and organisms, as well as the taxonomic groups reported, the group-specific effects, the compounds that are studied together, whether there are reports of positive or negative effects. for agriculture and the distribution of publications by country. We used the Thompson-ISI (Web of Science) database with the terms (“glyphosate *”) AND (“toxicity *”) to select publications. The clipping made in this study shows us the little concern to report the effects that glyphosate causes on the environment and organisms, so future studies should investigate the impacts caused by glyphosate, since this herbicide is one of the most used in the world. We then sought to estimate the Termitofauna of the Silvania National Forest and to determine the mean Lethal Dose (LD50) in Cornitermes workers. We sampled 31 genera of termites belonging to 4 families. For detection a glyphosate analytical curve between 50 and 650 ppb was constructed, however it was not possible to visualize the molecular weight ion of 168 m/z corresponding to the compound analyzed in the environmental samples. Mortality data collected during the LD50 test allowed the determination of 16 ppm as LD50 for Cornitermes silvestrii workers (p = 0.0062).