When a 10% granular formulation of aldicarb was applied at rates of 0.453, 0.907, and 1.360 kg active ingredient/acre to soil in which potatoes were grown, and the days between planting and treatment and between treatment and sampling were varied, residues in potatoes ranged from 0.20 to 0.04 ppm at harvest. When two 3-lb treatments were applied, residues ranged from 0.38 to 0.06 ppm at harvest. Analysis of the peeled potato and potato peeling showed that the residue at the 95% probability level had a small but significantly higher residue in the peel. Baking the potato did not destroy the residue.