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Persistence and effect of processing on reduction of chlorantraniliprole residues on brinjal and okra fruits
- Vijayasree, V., Bai, Hebsy, Beevi, S. Naseema, Mathew, Thomas Biju, George, Thomas, Xavier, George
- Environmental monitoring and assessment 2015 v.187 no.5 pp. 299
- decontamination, eggplants, fruits, half life, insecticide residues, okra, spraying
- Dissipation and decontamination of chlorantraniliprole (Coragen 18.5 SC) in brinjal and okra fruits were studied following field application at single and double doses of 30 and 60 g ai ha⁻¹, and the residues of the insecticide was estimated using LC-MS/MS. Initial residues of chlorantraniliprole at single and double doses on the fruits of brinjal were 0.72 and 1.48 mg kg⁻¹, while on okra fruits, the residues were 0.48 and 0.91 mg kg⁻¹, respectively. The residues reached below detectable level of 0.01 mg kg⁻¹ on the 10th day. Half-life of chlorantraniliprole at 30 and 60 g ai ha⁻¹ on brinjal was 1.58 and 1.80 days with the calculated waiting period of 0.69 and 2.38 days, whereas on okra, the values were 1.60 and 1.70 and 0 and 1.20 days, respectively. The extent of removal of chlorantraniliprole using simple decontaminating techniques at 2 h and 3 days after spraying was 40.99–91.37 % and 29.85–89.12 %, respectively, from brinjal fruits and 47.78–86.10 % and 41.77–86.48 %, respectively, from okra fruits.