The exposures of peach pickers to pesticide residues was quantified. Five fields were harvested each for 3 days at decreasing postapplication intervals. Aerosol and dermal exposure estimates indicated 98-99% of the workers'' dose was dermal, predominantly to the hands and upper extremities. Estimates of dose correlated with measurements of foliar residues. Despite estimated dose rates of up to 14 mg/h, the red blood cell cholinesterase in these workers may only slightly inhibited (about 4%) when compared to an unexposed, control population. Comparisons of these results with earlier studies of the insecticide parathion residues on citrus indicate a consistent pattern of worker exposure. A concern is raised over the efficacy of using existing foliar residue sampling methodologies for all other pesticides.