Estimating off-target spray deposition on the ground following the aerial application of glyphosate for conifer release in New Brunswick
- 1 April 1991
- journal article
- research article
- Published by Taylor & Francis in Journal of Environmental Science and Health, Part B
- Vol. 26 (2) , 185-208
- https://doi.org/10.1080/03601239109372730
Abstract
This study examines off‐target spray deposition resulting from three semi‐operational herbicide applications made in wind speeds from 1.5 m/s to 4.2 m/s. In the first 30 m downwind of the target area spray deposition decreased to less than 10% of the nominal dosage rate and to less than 5% at a distance of 200 m. Regression equations were developed and used to predict off‐target deposits. At a distance of 65 m, the current buffer zone width in New Brunswick, predicted deposits would be at best equivalent to 3.7% of the dosage rate and at worst 5.6% of the dosage rate. Given these results there are no plans to change the current buffer zone recommendation.Keywords
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