Persistence of aldicarb and carbofuran residues in potatoes grown in northwestern plains of India

Abstract

Abstract Replicated field experiments were conducted during autumn 1982–83 at Jalandhar (Punjab) for evaluating an insecticidal schedule involving soil application of aldicarb (Temik) 10 G and carbofuran (Furadan) 3 G @ 1.0 and 1.5 kg a.i./ha in two different protocols viz.; (i) single full dose application of granules in furrows at planting and (ii) equal split dose application of granules (half in furrows at planting + remaining half dose near plants base at earthing up), found effective for aphid control, for residues. The findings indicate that aldicarb and carbofuran residues in unprocessed (unwashed, unboiled and unpeeled) potatoes from 1.0 and 1.5 kg a.i./ha doses applied in single full dose in furrows at planting (in the first protocol) persisted above the tolerance limits (0.50 ppm each for aldicarb and carbofuran) up to 70 days. Aldicarb residues in such unprocessed potatoes persisted above the tolerance limit up to 70/49 and 80/59 days respectively, from 1.0 and 1.5 kg a.i./ha doses when applie...