Leaching of saflufenacil in soils with different organic matter contents

Lucas Heringer Barcellos Júnior; Christiano da Conceição de Matos; Gustavo Antônio Mendes Pereira; Dilma Francisca de Paula; Nayara Pereira Capobiango; Antônio Alberto da Silva

doi:10.14393/BJ-v38n0a2022-54055

Authors

Lucas Heringer Barcellos Júnior Universidade Federal de Viçosa
Christiano da Conceição de Matos Universidade do Estado de Minas Gerais https://orcid.org/0000-0002-0385-8737
Gustavo Antônio Mendes Pereira Agrocete
Dilma Francisca de Paula Universidade Federal de Viçosa
Nayara Pereira Capobiango Universidade Federal de Viçosa https://orcid.org/0000-0002-6747-4409
Antônio Alberto da Silva Universidade Federal de Viçosa

DOI:

https://doi.org/10.14393/BJ-v38n0a2022-54055

Keywords:

Environmental pollution, Ferralsol, Herbicide mobility, Xanthic Ferralsol, Weed.

Abstract

Saflufenacil is a herbicide recommended for use in the main agricultural crops in Brazil to control eudicotyledonous weeds. However, the application of saflufenacil has been carried out without previous knowledge of this herbicide interactions with soil colloids, which may increase environmental contamination risks. In this study, the leaching of saflufenacil in soil samples was estimated with different organic matter contents. Therefore, PVC columns were filled with samples of Xanthic Ferralsol (XF) and Ferralsol (F), with different physical and chemical attributes. Twelve hours after herbicide (70 g i.a. ha^-1) application, the PVC columns were subjected to a rainfall of 60 mm. For the evaluation of saflufenacil leaching, the columns were sectioned in ten parts with 5-cm each. Saflufenacil leached up to 50 and 40 cm deep in the samples, with the lowest contents of organic matter of XF and F, respectively. The increase in organic matter content of Ferralsol and Xanthic Ferralsol samples reduced saflufenacil leaching and the symptoms of intoxication in the indicator species. There was an inverse relation between the content of organic matter and the leaching of the herbicide in both soils studied. It was observed that the application of saflufenacil in soils with low organic matter contents may represent a significant environmental contamination risk of soils and watercourses.

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