Vol. 11, Issue 12 (2022)

Author(s):
Dr. S Srinivasa Reddy and Dr. C Narendra Reddy

Abstract:
Imidacloprid 17.8% SL @ 25 g a.i ha^-1 was sprayed thrice on fieldbean viz., first spray was given at 50 per cent flowering stage while 2^nd and 3^rd sprays were given at 10 days interval between each spray. Green pod samples were collected at regular intervals at zero (2 hours after spray), 1, 3, 5, 7, 10 and 15 days after third spray for dissipation pattern analysis.The results of imidacloprid residues showed that, the initial deposits of 1.24 mg kg^-1 were detected on field bean pods. The residues recorded at 1, 3, 5 and 7^th day after third spraying were found to be 0.72, 0.31, 0.08 and 0.06 mg kg^-1_, respectively and showing a dissipation per cent of 41.94, 75.00, 93.55 and 95.16, respectively. The residues reached below detectable level (BDL) at 10 days after last spray showing 100 per cent dissipation.