Dissipation of glyphosate and aminomethylphosphonic acid in water and sediment of two Canadian prairie wetlands

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
Dani DegenhardtDan Pennock

Abstract

Glyphosate [N-(phosphonomethyl)glycine] is the active ingredient of several herbicide products first registered for use in 1974 under the tradename Roundup. The use of glyphosate-based herbicides has increased dramatically over the last two decades particularly in association with the adoption of glyphosate-tolerant crops. Glyphosate has been detected in a range of surface waters but this is the first study to monitor its fate in prairie wetlands situated in agricultural fields. An ephemeral wetland (E) and a semi-permanent wetland (SP) were each divided into halves using a polyvinyl curtain. One half of each wetland was fortified with glyphosate with the added mass simulating an accidental direct overspray. Glyphosate dissipated rapidly in the water column of the two prairie wetlands studied (DT(50) values of 1.3 and 4.8 d) which may effectively reduce the impact of exposure of aquatic biota to the herbicide. Degradation of glyphosate to its major metabolite aminomethylphosphonic acid (AMPA) and sorption of the herbicide to bottom sediment were more important pathways for the dissipation of glyphosate from the water column than movement of the herbicide with infiltrating water. Presently, we are not aware of any Canadian guide...Continue Reading

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Citations

May 25, 2016·The Science of the Total Environment·Scott T McMurryBrian A Tangen
Apr 2, 2017·The Science of the Total Environment·C MaquedaE Morillo
Jan 6, 2017·Chemosphere·María Florencia GutierrezBelén Caisso
May 11, 2017·Environmental Technology·Jiang YuanDennis Mulcahy
Jun 9, 2018·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Shankani GunarathnaKasun Zoysa
Dec 5, 2018·Bulletin of Environmental Contamination and Toxicology·Tony SilveiraVinicius Farias Campos
Oct 11, 2015·Pest Management Science·William C KoskinenKathleen E Hall
Oct 26, 2016·Environmental Toxicology and Chemistry·Georg von MéreySteven L Levine
Aug 1, 2012·The Science of the Total Environment·Srinivas SuraAnnemieke Farenhorst
May 25, 2021·Environmental Pollution·Natalie CorralesDermot Antoniades

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