Effects of Per-household treatments on chlorpyrifos residues in Lettuce (Lactuce sativa)
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Date
2016-12
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BioMed Central
Abstract
The study was organized to evaluate the extent of accumulation of chlorpyrifos on
Lactuca sativa during cultivation and also examine the effect some pre-household
treatment procedure on residue levels. Concentrations of Chlorpyrifos applied at
different stages of growth of lettuce were examined using GC equipped with LCD. at
different time intervals of 1 h 24 h and 7 days after pesticide application. The results
showed that residue levels detected at 1 h and 24 h after application were all above
the MRL of 0.05 mgkg-1 and can pose health risk to consumers while that recorded 7
days after application were far below the MRL. Accumulation of chlorpyrifos on crop
during cultivation was not observed since no significant differences were observed 7
days after application at all the different stages. There is therefore the need for farmers
to allowed 7 days’ re-entry intervals before harvesting. All the pre-household treatment
procedures caused significant reduction in residues levels. Treatment T3 was most
effective in removing residues. Hence to reduce the risk associated with intake of
chlorpyrifos through lettuce, T3 procedure should be followed before consumption.
Description
An article published by BioMed Central
Keywords
Chlorpyrifos,, Consumers,, Health risk,, Removal,, Treatments
Citation
.,Peer reviewed and revised papers