Vol. 7, Issue 5 (2019)
Dissipation kinetics of imidacloprid residues in bhendi fruits
Author(s): G Preetha, J Stanley, T Manoharan and S Kuttalam
Abstract: Imidacloprid was applied at 15, 25 and 50 g a.i. ha-1 in bhendi and the level of residue was assessed to arrive the safe pre harvest waiting period in bhendi fruits. The bhendi fruit samples (250 g) were collected at 0, 1, 3, 5, 7, 10 and 14 days after the last round of application. The imidacloprid residue in bhendi fruit sample was estimated by High Performance Liquid Chromatography (HPLC). The initial deposits of imidacloprid at 15, 25 and 50 g a.i. ha-1 were 1.722, 3.006, 3.677, respectively in the field experiment I and 1.500, 2.985, 3.778, respectively in the field experiment II. The residues gradually decreased and reached the below detectable level (BDL) on 7th day after treatment in both the experiments treated with imidacloprid 25 g a.i. ha-1 (X dose) and on 10th day in case of imidacloprid 50 g a.i. ha-1 (2X dose). The half life period of imidacloprid ranged from 1.33 to 1.55 days. A safe waiting period of three days may be recommended for harvesting bhendi fruits after application of imidacloprid at 25 g a.i. ha-1.
Pages: 741-745 | 292 Views 56 Downloads
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How to cite this article:
G Preetha, J Stanley, T Manoharan, S Kuttalam. Dissipation kinetics of imidacloprid residues in bhendi fruits. Int J Chem Stud 2019;7(5):741-745.
