Persistence of Lindane, Malathion and Parathion Residues on Brinjal Fruits

Abstract

The residues estimation of 0.01 per cent lindane, 0.05 per cent malathion and 0.02 per cent parathion sprayed at the fall' of 350 litres/ha on the fruits of brinjal were carried out by bioassay technique using Drosophila melanogaster Meig. as a test insect. There were initial deposits of 10-l1 ppm of lindane 17-18 ppm of malathion and 20-21 ppm of Dilation 00 the brinjal fruits. The residual of lindane, malathion and parathion reached below tolerance limits of 10, 8 and 1 ppm in 1, 3 and 10 days of the treatment respectively. The half life life values for lindane, malabtion and parathion on brinjal fruits were 5,2 -3 and 3-4 days respectively.