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The Absence of Glyphosate Residues in Wet Soil and the Adjacent Watercourse after a Forestry Application in New Brunswick

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A successful ground application of glyphosate for competition control was made on an 11-ha site planted with white spruce. During the application, monitoring was conducted of the buffer-protected stream before treatment and intensively after treatment. No herbicide was found in the adjacent waters. In addition, samples were taken of water-saturated soil at several locations on the site, frozen, and analyzed for glyphosate. Under the application and weather conditions that prevailed, no glyphosate was detected 24 hours after treatment with a trace amount detected in one replicate sample after 1 year. Warm temperatures at the time of and in the season before the application are thought to explain the fast degradation rate in the water-saturated soil samples.

Keywords: glyphosate; ground application; water and soil monitoring

Document Type: Research Article

Publication date: 2007-09-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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