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Dissipation and Degradation Kinetics of Commonly Used Pesticides and their Metabolites In/On Okra, Abelmoschus esculentus (L.) Moench


Affiliations
1 Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Nadia 741 252, India
2 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, India
 

Based on the dissipation pattern and degradation kinetics study of pesticides in okra, the average initial deposit of dimethoate and acephate was comparatively higher than emamectin benzoate and flubendiamide. Acephate residues persisted much longer, while, emamectin benzoate persisted for a shorter time. Acephate metabolized to methamidophos on 1 day after treatment. Desido flubendiamide residues were not detected. Okra being harvested on alternate days, following a pre-harvest interval of 24 days after acephate application, is not possible. Thus, usage of acephate at the flowering stage in okra poses the risk of residue detection in the harvested produce. Following a pre-harvest interval of 3–11 days after spraying dimethoate, emamectin benzoate and flubendiamide are mandatory for the safe consumption of okra.

Keywords

Acephate, Dissipation, Dimethoate, Emamectin Benzoate, Half-Life, Okra.
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  • Dissipation and Degradation Kinetics of Commonly Used Pesticides and their Metabolites In/On Okra, Abelmoschus esculentus (L.) Moench

Abstract Views: 259  |  PDF Views: 144

Authors

C. Meenambigai
Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Nadia 741 252, India
K. Bhuvaneswari
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, India

Abstract


Based on the dissipation pattern and degradation kinetics study of pesticides in okra, the average initial deposit of dimethoate and acephate was comparatively higher than emamectin benzoate and flubendiamide. Acephate residues persisted much longer, while, emamectin benzoate persisted for a shorter time. Acephate metabolized to methamidophos on 1 day after treatment. Desido flubendiamide residues were not detected. Okra being harvested on alternate days, following a pre-harvest interval of 24 days after acephate application, is not possible. Thus, usage of acephate at the flowering stage in okra poses the risk of residue detection in the harvested produce. Following a pre-harvest interval of 3–11 days after spraying dimethoate, emamectin benzoate and flubendiamide are mandatory for the safe consumption of okra.

Keywords


Acephate, Dissipation, Dimethoate, Emamectin Benzoate, Half-Life, Okra.

References





DOI: https://doi.org/10.18520/cs%2Fv124%2Fi4%2F442-450