In 2018 and 2020, North American scientists from academia, government, and industry along with conservation experts and producers held workshops about quantitatively accounting for potential pesticide aquatic exposure reductions from vegetative filter strips (VFS) in ecological risk assessments. An outcome of the second workshop was the formation of a working group to evaluate input parameters when considering the utility of VFSMOD (a model that predicts pesticide runoff reduction using VFS) for quantitative use in pesticide risk assessments. Conceptually, a VFS (modeled using VFSMOD) would be located between an agricultural field (or other terrestrial pesticide use site) and a receiving waterbody (modeled using the Pesticide Root Zone Model (PRZM) and the Variable Volume Water Model (VVWM)) for North American aquatic risk assessments. Because VFSMOD has many parameters and its predictions vary in sensitivity to these parameters, a document is in development by the working group to define the VFSMOD (v4.5.0) input parameters, describe VFSMOD input file formats, and provide references to studies that have investigated the sensitivity of these parameters within VFSMOD. This presentation will describe the work of this group.

VFSMOD Input definitions, literature references and sensitivity analyses for evaluating vegetative filter strips in pesticide risk assessment

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ACS Fall 2022

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