Bleaching Browned Water Yam (Dioscorea alata) with Rubber (Hevea brasiliensis) Seed Lipoxygenase

The residues of carbendazim, endosulfan and phorate in fresh brinjal fruits and dehydrated slices were evaluated. The initial deposits of carbendazim after spray of 0.7 and 1.4 kg a.i./ha on the brinjal fruits were 1,49 and 2.82 (mu)g/ g, which was present beyond 15 days, with half-life of 4.59 and 5.03 days, respectively. Endosulfan residues on o day were 1.72 (mu)g/g at 0.5 kg a.i./ha and 2.97 (mu)g/g at 1.0 kg a.i./ha. The half-lives for endosulfan were 3.11 and 3.49 days for the recommended and double the recommended dose, respectively. The phorate residues recorded on the brinjal fruits on 45, 46, 48, 52 and 59 days after soil application were 0.051, 0.042, 0.031, 0.014 and 0.008 ppm in case of the recommended dose (1.0 kg a.i./ha), respectively. The trend was almost similar at double the recommended dose of 2.0 kg a.i./ha. Phorate residues were found in dehydrated product recording mean values of 0.10 and 0.19 mg/kg in recommended dose and double dose treatments, respectively. Dehydration process decreased the residues of both carbendazim and endosulfan completely into non-detectable level.