PERSISTENCE PATTERN OF CHLORPYRIFOS, CYPERMETHIRN AND MONOCROTOPHOS IN OKRA
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Persistence of chlorpyrifos, cypermethrin and monocrotophos on okra was studied following application at dose of 100,200,300g a.i.h-1 to work out the safe preharvest waiting period. Samples of okra fruits were collected periodically days at harvest after treatment of the pesticides. A multi-residue extraction procedure was carried out using acetonitrile containing 1% acetic acid and cleaned up with PSA and magnesium sulphate extract analysed by GC-MS. The average initial residues chlorpyrifos, cypermethrin and monocrotophos were in the range of 0.389-0.874, 0.378-0.862 and 0.391-0.898mgkg 1respectively. The residues of pesticides fell below detection in the 15, 17 and 19 days of chlorpyrifos, cypermethrin and monocrotophos, respectively.
SUBHASH CHANDRA, MUKESH KUMAR, ANIL N. MAHINDRAKAR, L.P. SHINDE (2014); PERSISTENCE PATTERN OF CHLORPYRIFOS, CYPERMETHIRN AND MONOCROTOPHOS IN OKRA, Int. J. of Adv. Res., 2 (12), 0, ISSN 2320-5407. DOI URL: https://dx.doi.org/
