Abstract
A 10% granular formulation of aldicarb (Temik 10G) was applied to soil in field trials at rates of 5 kg a.i./ha and incorporated by rototillage. Potatoes were grown and harvested 128–174 days after soil treatment. The parent compound aldicarb could not be detected in any sample. However, in 51 potato samples residue levels of its oxidation products, sulphoxide and sulphone, ranged from 0.02 to 0.77 mg/kg fresh potato when expressed as sulphone. In most samples the sulphoxide was the main compound which accounted for 42–76% of the total residue. Weather conditions possibly had some influence on residue levels. Residues in the peelings were 11% higher than in peeled potatoes. Cooking potatoes for 20–24 minutes in water lowered the residue content by 42–52%. During storage of a few potato samples at 2° C for two months, the residue values decreased by 42–55%.
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