Monitoring of Residues of Oxydemeton-Methyl in Greenhouse Vegetables in Shahrekord, Iran

Hassan Hashemi; Ramazan sadeghi; Abdolmajid Fadaei; Mehraban Sadeghi
In order to increase yield and quality of some fruits and vegetables, pesticides are repeatedly applied during the entire growth period. The aim of this study was to monitor Oxydemeton-methyl residuals (as a model pesticide) in cucumbers and tomatoes, as the most consumed vegetables and also grown in greenhouse farms of Shahrekord, Iran. The vegetable samples were collected in during a six-month period from two big greenhouse farms located in Shahrekord vicinity which use this pesticide. Sampling was accomplished after one week of any stage of pesticides spray application. Analyses were performed by Gas chromatography-Mass Spectrometry (GC/MS) method. The average values of pesticide residuals in unwashed, washed and peeled cucumber samples were 0.23± 0.17, 0.18± 0.1, 0.15± 0.6 0.08± 0.5(μg/kg) respectively. The average values of the residues in unwashed, washed and peeled tomato samples were 1.61± 0.8, 0.85± 0.09, 0.67± 0.04 (μg/kg) respectively. The results showed that the pesticide residuals in total cucumber and tomato samples were more than permissible limit. Peeling and washing were effective but didn’t decrease the pesticide level lower than the permissible limit. Consumers are recommended to wash and to peel cucumbers and tomatoes before they consume in order to reduce daily intake of the toxicants through the diet.
Pesticide Residuals; Oxydemeton-methyl; Greenhouse Vegetables; Cucumber; Tomato
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