Mobility and persistence of the herbicide fomesafen in soils cultivated with bean plants using SLE/LTP and HPLC/DAD

• Autor(a) principal: Costa, Anna I. G.
• Data de Publicação: 2014
• Outros Autores: Queiroz, Maria Eliana L. R., Neves, Antônio A., Assis, Roberta C. de, Soares, Carlos E. S. dos, Silva, Antônio A. da, D’Antonino, Leonardo, Oliveira, André F. de, Bellato, Carlos R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: https://doi.org/10.1007/s11356-014-3557-5; http://www.locus.ufv.br/handle/123456789/18503
• topic: Half-life; Environmental impact; Soil characteristics; Leaching; Persistence

A method has been optimized and validated for the determination of fomesafen in soils using solid–liquid extraction with low-temperature partitioning (SLE/LTP) and analysis by liquid chromatography with a high-efficiency diode array detector (HPLC/DAD). The method was used to evaluate the persistence and mobility of this herbicide in different soils cultivated with bean plants. Recovery values were ≥98.9 %, with variations in the repeatability coefficients of ≤15 %, and a detection limit of 7.3 μg kg−1. Half-life values of fomesafen were between 60 and 71 days in soil cultivated using a no-till system and 99 and 114 days in soil cultivated using a conventional tillage system. The mobility of fomesafen was moderate and mainly influenced by the organic matter content, pH, and soil type. In Red-Yellow Argisol, which has a higher content of organic matter, the leaching of fomesafen was less pronounced. In Red-Yellow Latosol, which has smaller amounts of organic matter and high pH, the leaching of fomesafen was more pronounced.