Journal of Environmental Science and Health Part B · 1991 · 13 citations · 1 references
AgricultureCrop SciencesCrop ProtectionHerbicide Application TechnologyHerbicide Mode Of ActionHerbicide ScienceSpray DepositionBuffer Zone AnalysisOff-target DepositionPesticide Deposition ModelingPostemergence Herbicide ApplicationsSpray Deposition AssessmentSpray Deposition ModelingWindWind Effects On Deposition
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.
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