Dissipation and persistence pattern of chlorantraniliprole residues in tomato under open field conditions and its estimation through UHPLC-PDA

Field experiment was carried out to study the dissipation and persistence of chlorantraniliprole in tomato (cv. Kashi Vishesh) sprayed @ 30 and 60 g a.i. ha⁻¹. The initial residues ranged from 0.54 to 0.74 and 0.92 to 1.20 mg kg⁻¹. Residues further declined below Limit of Quantification (LOQ) of 0.05 mg kg⁻¹ after 5^th day, respectively. The T_1/2 of chlorantraniliprole on tomato after the 2^nd spray was calculated to be 1.02 and 1.32 days whereas after the 3^rd spray it was observed to be 0.90 days at both the dosages. The safe waiting period for tomato was suggested to be 1 day after application, if followed the GAP.