França Fernanda Menezes, De Paiva Teresa C Brazil, Marcantônio Adriana S, Teixeira Patrícia C, Ferreira Cláudia Maris
a Engineering School of Lorena , University of São Paulo - USP , São Paulo , Brazil.
J Environ Sci Health B. 2015;50(6):406-10. doi: 10.1080/03601234.2015.1011950.
The objective of this study was to determine the acute toxicity of some pesticides used in irrigated rice farming to Lithobates catesbeianus tadpoles. The LC 50-96h for commercial formulations containing bentazon, penoxsulam, vegetable oil, permethrin and carbofuran, separately and their mixtures, were determined at the proportions commonly used in the field. The limits of risk concentrations of these products for the studied species were also established. The LC 50-96h for tadpoles was 4,530 mg L(-1) for bentazon; 7.52 mg L(-1) for penoxsulam + 145.66 mg L(-1) of vegetable oil; 81.57 mg L(-1) for vegetable oil; 0.10 mg L(-1) for permethrin; 29.90 mg L(-1) for carbofuran (active ingredients), and 38.79 times the dose used in the field for the mixture of these products. The environmental risk was determined only for permethrin, and care should be taken when using the vegetable oil.
本研究的目的是确定灌溉稻田中使用的某些农药对牛蛙蝌蚪的急性毒性。分别测定了含有灭草松、五氟磺草胺、植物油、氯菊酯和克百威的商业制剂及其混合物在田间常用比例下的96小时半数致死浓度（LC 50-96h）。还确定了这些产品对所研究物种的风险浓度限值。蝌蚪的96小时半数致死浓度分别为：灭草松4530毫克/升；五氟磺草胺7.52毫克/升 + 植物油145.66毫克/升；植物油81.57毫克/升；氯菊酯0.10毫克/升；克百威（活性成分）29.90毫克/升，以及这些产品混合物田间使用剂量的38.79倍。仅对氯菊酯确定了环境风险，使用植物油时应谨慎。
