Effect of Isopropyl-N-(3-chlorophenyl) Carbamate (CIPC) Dusting on Potatoes During Non-refrigerated Storage: Sprout Suppression and Residues

Effect of isopropyl-N-(3-chlorophenyl) carbamate (CIPC) on sprout growth was studied in 2 potato cv. during non-refrigerated storage (16-30.8°C). Single application of 1% CIPC dust (@25 mg a.i./kg tubers) before storage checked sprout growth up to 60 days of storage (DOS) and double treatment (one before storage (C1PC-1) and another (CIPC-I1) after 30 DOS) was effective up to 120 days. The sprout weight and weight loss were least in CIPC-II after 120 DOS, but rotting was more as compared to control and CIPC-I treatment. The highest CIPC residue level was detected in peels, followed by unpeeled tubers and cortex and the residue levels were higher in CIPC-lt than CIPC-I. With increase in duration of storage the residue decreased and was minimal after 130 days of first application. In none of the samples, the residues were higher than the acceptable limit of 30 mg/kg of tubers after 40 days of treatment. The results show that CIPC double treatment was effective in sprout suppression under non-refrigerated conditions and the treated potatoes were safe for human consumption after 40 days of treatment.