National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Thiamethoxam25 % WG is a second neonicotinoid with highly systemic and broad spectrum insecticide used against sucking pests of vegetables in India. Thiamethoxam residues were quantified through regular sampling till the residues are below determination level (BDL) of 0.05 mg kg−1 following the validated QuEChERS method. The qualitative and quantitative analysis of thiamethoxam was performed on LC- MS/MS(PDA). Initial deposits of 1.62 mg kg-1 were detected in capsicum samples collected from open filed, which dissipated to BDL in 7.0 days while in poly house, initial deposits of 2.77 mg kg-1 were dissipated to BDL in 15.0 days. The waiting period for safe harvest was worked out to be 10.0 and 15.0 days when thiamethoxam25 % WG@ 50 ml a.iha-1sprayed thrice in open and poly house conditions, respectively. Dissipation is slow in poly house compared to open fields due to various factors. In both situations initial deposits are lower than the MRL (10 mg kg−1) of Codex Alimentarius Commission hence a pre-harvest interval of 7.0 and 15.0 day is recommended.
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