Effectiveness of traditional processing techniques on residual removal in chilies sprayed with various pesticides

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Research Paper 01/10/2014
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Effectiveness of traditional processing techniques on residual removal in chilies sprayed with various pesticides

Saghir Ahmed Sheikh, Aasia Akbar Panhwar, Benish Nawaz Mirani, Shafi Muhammad Nizamani
J. Bio. Env. Sci.5( 4), 365-370, October 2014.
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Abstract

Pesticide usage in Pakistan is rapidly increasing and cases of misuse or over-use of pesticides are simultaneously on the increase. Pesticide use raises a number of environmental concerns, and human and animal health problems. Chilies were grown on farmer field (area of about half acre) through organic farming without pesticide spray to serve as control. Besides, six plots of chilies (area about half acre each) were sprayed with six pesticides, that is, bifenthrin, profenofos, endosulfan, imidacloprid, emamectin benzoate and diafenthiuron separately at recommended doses. The sprayed chilies were harvested next day, packed in polyethylene bags with appropriate labeling and brought to the laboratory of Institute of Food Sciences and Technology, Sindh Agriculture University, Tandojam for the treatment of various traditional processing techniques to evaluate their effects. After the application of the treatments, the samples were processed for extraction and cleanup. The samples were then further analyzed by GCMS or HPLC and data obtained was analyzed statistically and presented. It was concluded that chilies were contaminated with pesticide residues well above their respective MRLs, and were unsafe for human consumption if taken in raw form. Traditional processing activities particularly washing, drying and cooking operations played effective role in large reductions in the residual level of pesticides. Frying/ cooking and sun-drying were found the most effective treatments in the reduction of residues.

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