Levels of Chlorine and phosphorus containing pesticide residues on selected vegetables in Zambia

dc.contributor.authorInambao, Pauline Manayiwa Tanaye
dc.date.accessioned2011-04-01T16:13:12Z
dc.date.available2011-04-01T16:13:12Z
dc.date.issued2011-04-01
dc.description.abstractTomatoes and cabbage samples were analysed for chlorpyrifos and monocrotophos residues by Gas Chromatography (^GC) vntYv electron capture detector. One field o? tomatoes and cabbage was treated for four weeks at the recommended dose of 0.61/Ha monocrotophos and 21/Ha chlorpyrifos. A second field treated twice in seven days with chlorpyrifos and monocrotophos. A th ird field was not treated at all. The analysis revealed that tomatoes sprayed twice only showed tolerable levels of chlorpyrifos residues while the monocrotophos residues exceeded these levels. No residues were detected after the twenty first day. The residues detected in the cabbage that was sprayed twice only rose to a maximum on the twenty first day after the initial spraying and then decreased to levels above the FAO/WHO Maximum Residue Limits (MRL's). Both tomatoe and cabbage sprayed weekly retained residues with cabbage showing higher levels than tomatoe. The residues detected in the cabbage, sprayed weekly, were as high as 18.268mg/kg for chlorpyrifos and 29.043mg/kg for monocrotophos i.e. well above the recommended FAO/WHO MRL's. Twenty percent of the tomatoe and cabbage samples obtained from the markets were found to have residues exceeding the recommended MRL's. This study also showed that despite the same treatment, tomatoe and cabbage responded differently to chlorpyrifos and monocrotophos and as a result retained their residues in unequal quantities.en_US
dc.identifier.urihttp://dspace.unza.zm/handle/123456789/272
dc.language.isoenen_US
dc.subjectChlorineen_US
dc.subjectPesticidesen_US
dc.subjectPhosphorusen_US
dc.titleLevels of Chlorine and phosphorus containing pesticide residues on selected vegetables in Zambiaen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
inambao0001.PDF
Size:
2.1 MB
Format:
Adobe Portable Document Format
Description:
License bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
5.13 KB
Format:
Item-specific license agreed upon to submission
Description:
Collections