Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, RS-135 - Km 72, nº 200, Erechim, RS, Brazil.
Environ Toxicol Pharmacol. 2021 Jul;85:103637. doi: 10.1016/j.etap.2021.103637. Epub 2021 Mar 19.
Pesticide contamination is an important factor in the global decline of amphibians. The herbicides glyphosate and 2,4-D are the most applied worldwide. These herbicides are often found in surface waters close to agricultural areas. This study aims at evaluating the chronic effects caused by glyphosate + 2,4-D mixture in Boana faber and Leptodactylus latrans tadpoles. The combined solution of the glyphosate and 2,4-D, in 5 different concentrations, was applied for 168 h. Herbicide mixtures did not affect the survival of the exposed tadpoles but growth and swimming activity were altered; besides causing several damages in the mouth and intestine. The erythrocytes showed micronuclei and other nuclear abnormalities. There is an ecological risk in the exposure of tadpoles of B. faber and L. latrans from the mixture of glyphosate + 2,4-D. Therefore, the approach used in this study provides important information on how commonly used pesticides can affect non-target organisms.
农药污染是全球两栖动物减少的一个重要因素。除草剂草甘膦和 2,4-D 是全球应用最广泛的除草剂。这些除草剂通常在靠近农业区的地表水中被发现。本研究旨在评估草甘膦+2,4-D 混合物对 B. faber 和 L. latrans 蝌蚪的慢性影响。草甘膦和 2,4-D 的混合溶液在 5 种不同浓度下应用了 168 小时。除草剂混合物并未影响暴露的蝌蚪的存活率，但生长和游泳活动受到影响；此外，还导致口腔和肠道出现多种损伤。红细胞出现微核和其他核异常。B. faber 和 L. latrans 蝌蚪暴露于草甘膦+2,4-D 混合物中存在生态风险。因此，本研究中使用的方法提供了有关常用农药如何影响非目标生物的重要信息。
