Comparative studies on dissipation behavior of cyantraniliprole on tomato and chilli
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Date
2023-01
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CCSHAU, Hisar
Abstract
Dissipation studies of cyantraniliprole (Benevia 10.26% OD) in tomato and chilli fruit and soil was carried out following spray of cyantraniliprole at fruit setting stage on both crops grown in plots of 5x5 m size. The recommended dose for tomato and chilli was 90 g a.i. ha-1 and 60 g a.i. ha-1respectively and double of recommended dose for tomato and chilli was 180 g a.i. ha-1 and 120 g a.i. ha-1 respectively. Samples of tomato and chilli were extracted by using modified QuEChERS method and analysis was done on HPLC with retention time of 5.4 minutes. Recovery experiments were carried out on tomato and chili fruit sample fortified @ 0.03, 0.50 and 1.00 mg kg-1 and the recoveries obtained were in the range of 86.21 – 89.44% and 85.21 – 88.45% respectively. Recoveries obtained while recovery experiments of tomato and chilli soil were in the range of 86.60 – 88.21%. Initial residue deposit of cyantraniliprole in tomato fruit was 0.552 mg kg-1and 0.654 mg kg-1 and in chilli fruit was 0.523 mg kg-1 and 0.632 mg kg-1 for single (T1) and double (T2) dose respectively. These residues dissipated following first order degradation kinetics with half- life of 2.63 and 2.83 days in tomato fruit and 2.68 and 3.9 days in chilli fruit respectively and reached below limit of quantification (LOQ i.e. 0.03 mg kg-1) on 10th and 15th day for single (T1) and double (T2) dose respectively Level of residues in soil were < LOQ for both single (T1) and double dose (T2) on 0 day (after 1h of spray) in both tomato and chilli soil. Maximum Residue Limit (MRL) established by FSSAI for cyantraniliprole in tomato and chilli was 0.5 mg kg-1 and from consumer point of view 3 day PHI was suggested for both crops.