Pesticides in Air. Part 2. Development of Predictive Methods for EstimatingPesticide Flux to Air

摘要

The objective was to develop a predictive method to provide flux values forapplied pesticides that could serve as input to air dispersion models that estimate downwind pesticide concentrations. This method requires information on pesticide application methods and rates of application, and on the physicochemical properties of the pesticides of interest. This method will assist Cal/EPA in assigning priorities to pesticides that pose potential health problems, so that staff will conduct ambient monitoring for the most appropriate pesticides. Measured flux data were correlated with test conditions that can influence those data. Test conditions parameters that can influence flux data include type of surface (soil, water, crop), amount of pesticide applied, method of application, physicochemical properties of the pesticide, and weather conditions. Correlations were determined between volatilization flux values of pesticides and the physicochemical properties of these pesticides.