Validation of analytical methodology for dissipation and persistence of diafenthiuron and cyantraniliprole on okra

The residue and dissipation studies of diafenthiuron, its metabolites and cyantraniliprole were carried out on okra under field conditions after two applications of Cyantraniliprole 7.3% w/w + Diafenthiuron 36.4% w/w SC @ 60 + 300 g a.i./ha. Okra fruit samples were collected at 0 (2 hr), 1, 3, 5, 7, 10 and 15 days after second spray. The samples were processed using QuEChERS methodology and analysed on LCMS/MS. The total initial residues of diafenthiuron (diafenthiuron + CGA 177960, CGA 227352, CGA 140408) in okra fruit were 0.28 and 0.55 mg kg(-1) at single and double dose, respectively. The total residues of diafenthiuron dissipated below limit of quantification (LOQ) of 0.01 mg kg(-1) at 10 days of application at both the doses. The initial residues of cyantraniliprole in okra were 0.23 and 0.42 mg kg(-1) at single and double dose, respectively. The residues dissipated below 更多