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Pesticide Research Journal
Year : 2011, Volume : 23, Issue : 1
First page : ( 23) Last page : ( 26)
Print ISSN : 0970-6763. Online ISSN : 2249-524X.

Persistence and Dissipation of Pesticides in Chilly and Okra at North Maharashtra Region

Waghulde PN, Khatik MK, Patil VT, Patil PR*

School of Environmental and Earth Sciences, North Maharashtra University, Jalgaon 425 002, MS, India

*Corresponding author E-mail: pr_patil12@rediffmail.com

Online published on 21 May, 2012.

Received:  10  August,  2010; Accepted:  7  April,  2011.

Abstract

Dissipation of chlorpyrifos, endosulfan, dimethoate and malathion residues were studied in/on chilly (Capsicum annum L) and okra (Abelmoschus esculentus L) fruits at North Maharashtra region, India. The samples were procured up to 21 d after application of pesticides by knapsack sprayer. A typical multi-residue extraction procedure using ethyl acetate and sodium sulphate has been applied and concentrated extracts were estimated on GC-ECD system. The dissipation of all residues was found to be initially fast. As time advances, the dissipation rate of extractable residue decreases. The half life of residues in chilly ranged between 3.22 and 5.49 d and waiting period from 9.38 to 18.08 d. The half life in okra ranged between 3.68 to 6.92 d and waiting period from 14.54 to 20.93 d. Highest % recovery of endosulfan (89.1%) from chilly and chlorpyrifos (91.4%) from okra was found.

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Keywords

Vegetables, chilly, okra, pesticides, dissipation, multi-residue analysis, GC.

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