Dissipation of Certain Pesticides on/in Capsicum in Open Field & Poly House
Journal Title: Journal of Plant Science and Research - Year 2016, Vol 3, Issue 2
Abstract
Studies were undertaken to establish dissipation of commonly used insecticides at recommended dose both in open field and poly house situations to assess the differences in rate of dissipation, and also to recommend Pre-Harvest Intervals based on MRLs established by CAC and FSSAI by utilizing Carbendazim, Chlorpyriphos, Ethion, Triazophos and Profenophos sprays and capsicum samples collected at regular intervals were analyzed for residues. The dissipation pattern of insecticides in open field conditions showed that initial deposit of 2.47 mg kg-1 of carbendazim dissipated to 0.04 mg kg-1 by 15 days whereas Chlorpyriphos 0.468 mg kg-1 dissipated to BDL by 7th day. Similarly Ethion (0.746 mg kg-1 dissipated to BDL by 10th day, whereas Triazophos (1.947 mg kg-1) dissipated to BDL by 15th day (1.947 mg kg-1) to BDL by 10th day. As no MRLs are available for, PHI of 10 days can be recommended as residues dissipated to less than 0.05 mg kg-1. As per the Insecticide Act, 1968, profenofos is not recommended for use, but when sprayed at farmer’s dose on capsicum, 2.24 mg kg-1 and 3.71 mg kg-1 initial deposits were recorded in open field and poly house, respectively. Codex suggests MRL as 10 mg kg-1, hence it can be concluded that profenofos application does not leave residues above MRL. Out of five insecticides tested in poly house. Chlorpyriphos and profenophos residues are found in capsicum up to 10 days, while carbendazim, Ethion and Triazophos are detected up to 15 days.
Authors and Affiliations
Shashi Vemuri
Keywords
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