Degradation and leaching of bentazone, terbuthylazine and S-metolachlor and some of their metabolites: A long-term lysimeter experiment

Andrea Schuhmann, Gernot Klammler, Stefan Weiss, Oliver Gans, Johann Fank, Georg Haberhauer and Martin H. Gerzabek
Additional contact information
Andrea Schuhmann: Environment Agency Austria, Environmental Analysis, Vienna, Austria
Gernot Klammler: JR-AquaConSol GmbH, Graz, Austria
Stefan Weiss: Environment Agency Austria, Environmental Analysis, Vienna, Austria
Oliver Gans: Environment Agency Austria, Environmental Analysis, Vienna, Austria
Johann Fank: JR-AquaConSol GmbH, Graz, Austria
Georg Haberhauer: Department of Forest and Soil Science, Institute of Soil Research, University of Natural Resources and Life Sciences Vienna, Vienna, Austria
Martin H. Gerzabek: Department of Forest and Soil Science, Institute of Soil Research, University of Natural Resources and Life Sciences Vienna, Vienna, Austria

Plant, Soil and Environment, 2019, vol. 65, issue 5, 273-281

Abstract: The degradation and leaching of bentazone, terbuthylazine and S-metolachlor and their metabolites N-methyl-bentazone, desethyl-terbuthylazine, 2-hydroxy-terbuthylazine, metolachlor ethane sulfonic acid (ESA) and metolachlor oxanilic acid (OA) were investigated using the plant protection products Artett (bentazone/terbuthylazine), Gardo Gold (S-metolachlor/terbuthylazine) and Dual Gold (S-metolachlor) applied to a weighable, monolithic, high precision lysimeter with a loamy, sandy soil. Artett and Gardo Gold were applied at higher doses than recommended according to good agricultural practice. In leachate, S-metolachlor was detected at concentrations of up to 0.15 µg/L, whereas metolachlor-ESA and metolachlor-OA were present at higher concentrations of up to 37 µg/L and 8.4 µg/L, respectively. In a second terbuthylazine application, concentrations of desethyl-terbuthylazine of up to 0.1 µg/L were detected. In soil, bentazone degraded faster than terbuthylazine and S-metolachlor, whereas the metabolization of terbuthylazine after the second application resulted in an enhanced formation of desethyl-terbuthylazine and a highly increased hydroxylation of terbuthylazine. The importance of analysing both parent compounds and metabolites on a long-term scale was demonstrated to better understand the environmental fate and transport.

Keywords: agriculture; herbicide; contamination; metabolism (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://pse.agriculturejournals.cz/doi/10.17221/803/2018-PSE.html (text/html)
http://pse.agriculturejournals.cz/doi/10.17221/803/2018-PSE.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:65:y:2019:i:5:id:803-2018-pse

DOI: 10.17221/803/2018-PSE

Access Statistics for this article

Plant, Soil and Environment is currently edited by Kateřina Součková

More articles in Plant, Soil and Environment from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().