1. Faculty of Agronomy, University of Cruz Alta (Unicruz), Cruz Alta, Brazil;
2. Graduate Program of Soil Science, Federal University of Santa Maria (UFSM), Santa Maria, Brazil;
3. Laboratory of Pesticides Residues Analyses (LARP), Federal University of Santa Maria, Santa Maria, Brazil;
4. Centre for Rural Sciences, Federal University of Santa Maria, Santa Maria, Brazil;
5. Crop Protection Graduate Program, Federal University of Pelotas (UFPel), Pelotas, Brazil