Modeling Unsaturated Zone Movement of Aldicarb Residues from Applications to Potatoes in Eastern Canada

Abstract

Abstract The unsaturated zone model PRZM was used to simulate movement of aldicarb residues resulting from applications to potatoes grown in Ontario, Quebec and Prince Edward Island. These simulations suggest aldicarb residues will not generally enter shallow groundwater at levels exceeding the drinking water guideline. In instances where residues do enter shallow groundwater the resulting magnitude will be sufficiently small to permit degradation of residues to below guideline concentrations before moving beyond the required 150 m buffer zone around drinking water wells. The simulation results are consistent with existing potable well monitoring data.