Dissipation of imidacloprid on Kinnow mandarin fruits under sub-tropical conditions.

摘要

Residues of imidacloprid were estimated in the pulp and rind of Kinnow mandarin fruits separately on high performance liquid chromatography. Following the application of imidacloprid at 0.008 and 0.016% a.i. on Kinnow mandarin plants, the average initial deposits at both these dosages on the rind of Kinnow mandarin fruits were 2.40 and 3.90 mg/kg, respectively. The corresponding values in the pulp were 0.03 and 0.04 mg/kg, respectively. A sudden decline in the residue levels in the rind and a corresponding increase in the pulp was observed on the fifth day. Thereafter, the residue levels steadily decreased both in the rind and pulp. Residues of imidacloprid were below its maximum residue limit of 1.0 mg/kg in whole citrus fruits at zero day sampling.