The Dissipation Pattern , Residues of Profenophos In Tomato ( Lycopersicon esculentum Mill . )

Field experiment was carried out during kharif, 2012 to evaluate the dissipation pattern of most commonly used insecticide profenophos 50 EC @ 1000 g a.i. ha-1 with two sprays of insecticide, first given after fruit initiation and the second spray 10 days later and collecting the fruits at 0, 1, 3, 5, 7, 10, 15, 20 days after last spray, and analysed for residues using the validated QuEChERS method. The initial deposits of 1.16 mg kg-1 profenophos detected on tomato sprayed with profenophos @ 1000 g a.i. ha-1 were dissipated by 42.24% (0.67 mg kg-1) by 1st day, 56% (0.51 mg kg-1) by 3rd day, 73.25% (0.31 mg kg-1) by 5th day and below determination level (0.05 mg kg-1) by 7th day. A safe waiting period of 1 day is recommended considering Maximum Residues Limits (10 mg kg-1) of Codex Alimentarius Commission (CAC).