Abstract
Values for potential dermal and respiratory exposure, and for total exposure in terms of fraction of toxic dose were determined for 11 different pesticides during orchard spraying with air-blast application equipment. Highest total exposure was calculated to be only 1.12% of a toxic dose per hour for workers applying the organophosphorus compound, carbophenothion, the most toxic compound in the study. There was considerable variation in exposure to a specific pesticide depending on certain factors, mainly wind. Potential dermal exposure to each compound was much greater than potential respiratory exposure. Workers were subjected to relatively small fractions of a toxic dose each day as they applied the compounds that were studied.
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