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Concentration and Off-target Movement of Neonicotinoid Residues During Agricultural Practices in Southwestern Ontario

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Title: Concentration and Off-target Movement of Neonicotinoid Residues During Agricultural Practices in Southwestern Ontario
Author: Forero, Luis Gabriel
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Schaafsma, Art W.
Abstract: Neonicotinoid insecticides are important globally to control pests in numerous agricultural crops, representing 24% of total agricultural insecticide use. Recently, exposure of non-target organisms to neonicotinoids present in various agricultural matrices is debated as a result of their use as seed treatments in field crops. Field sampling and laboratory studies were conducted from 2013 to 2016 to determine concentration and movement of soil bound residues and particulate matter exhausted from vacuum type planters during the planting of neonicotinoid treated seed. “Wick effect” was reported as an important process that results in accumulation of neonicotinoid residues in the soil surface. Total suspended particulate (TSP) concentrations of neonicotinoid are higher at the edge of fields during planting than tillage of fields. Neonicotinoid residues were detected during wind events, tillage and planting practices. Efforts should be directed towards reducing the amount of material dislodging from treated seeds and reducing the amounts of contaminated dust exhausted by the planter. Avoiding excessive tillage and practicing soil conservation can be useful in minimizing the off-site transport of neonicotinoid residues.
URI: http://hdl.handle.net/10214/10320
Date: 2017-04-24


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