Dissipation Kinetics, Risk Assessment, and Decontamination Studies of Pyridalyl in Cabbage by GC–MS/MS

ABSTRACTDissipation behavior of pyridalyl was determined on cabbage crop following two applications of pyridalyl @ 50 (X), 62.5 (1.25X), and 100 g a.i. ha−1 (2X). QuEChERS method along with gas chromatography–mass spectrometry/mass spectrometry technique was used for the quantification of pyridalyl residues. Mean initial deposits were found to be 0.49, 0.60, and 1.12 mg kg−1 at X, 1.25X, and 2X doses on cabbage heads, and the residues reached below the limit of quantification (LOQ) of 0.01 mg kg−1 after 15th, 15th, and 20th days at the three doses, respectively. Mean initial deposit in soil was 0.11, 0.13, and 0.24 mg kg−1, which reached below LOQ on 7th to 15th days at all the doses. Half‐life value of pyridalyl in cabbage was calculated to be 1.88, 2.48, and 2.58 days at single, 1.25X, and double dosages, respectively. Among various household processing methods, 2% NaCl solution along with boiling was highly effective in reducing the residue of pyridalyl up to 83.38%–86.12% in cabbage. Risk assessment done by calculating hazard quotient shows that the application of pyridalyl @ 50 and 100 g a.i. ha−1 is acceptable for consumption.