Your search found 6 records
1 Amoah, Philip; Drechsel, Pay; Abaidoo, R. C.; Ntow, W. J.. 2006. Pesticide and pathogen contamination of vegetables in Ghana’s urban markets. Archives of Environmental Contamination and Toxicology, 50:1-6.
Public health ; Helminths ; Diseases ; Risks ; Vegetables ; Commodity markets ; Irrigation water ; Water quality ; Pesticide residues / Ghana / Accra, Gulf of Guinea / Kumasi / Ashanti
(Location: IWMI-HQ Call no: IWMI 362.1 G200 AMO Record No: H038625)
http://www.springerlink.com/content/7575km06652224q3/fulltext.pdf
https://vlibrary.iwmi.org/pdf/H038625.pdf
https://vlibrary.iwmi.org/pdf/H038625.pdf
(248.40KB)
2 Ntow, W. J.; Gijzen, H. J.; Kelderman, P.; Drechsel, Pay. 2006. Farmer perceptions and pesticide use practices in vegetable production in Ghana. Pest Management Science, 62:356-365.
(Location: IWMI-HQ Call no: IWMI 632.95 G200 NTO Record No: H038738)
3 Ntow, W. J.; Ameyibor, J.; Kelderman, P.; Drechsel, Pay; Gijzen, H. J. 2007. Dissipation of endosulfan in field-grown tomato (Lycopersicon esculentum) and cropped soil at Akumadan, Ghana. Journal of Agricultural and Food Chemistry, 55: 10864–10871.
(Location: IWMI HQ Call no: IWMI 635.642 G200 NTO Record No: H040553)
The dissipation and persistence of endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro- 6,9-methano-2,4,3-benzodioxathiepin 3-oxide) applied to field-grown tomato (Lycopersicon esculentum) were studied at a vegetable-growing location in Ghana. Plant tissue samples and cropped soil collected at 2 h-14 days and 8 h-112 days, respectively, after application, were analyzed by gas chromatography-electron capture detection (63Ni) to determine the content and dissipation rate of endosulfan isomers (R- and _-endosulfan) and the major metabolite, endosulfan sulfate. After two foliar applications of commercial endosulfan at 500 g of active ingredient/hectare, the first-order reaction kinetic was confirmed to describe the dissipation of endosulfan residues in tomato foliage and cropped soil. However, functions that best fit the experimental data were the biphasic process for foliage and the monophasic process for cropped soil. Calculated DT50 and DT90 values for endosulfan residues in cropped soil were not significantly (p < 0.05) different for each of the two isomers.
4 Ntow, W. J.; Tagoe, L. M.; Drechsel, Pay; Kelderman, P.; Nyarko, E.; Gijzen, H. J. 2009. Occupational exposure to pesticides: blood cholinesterase activity in a farming community in Ghana. Archives of Environmental Contamination and Toxicology, 56:623–630.
Farmers ; Health hazards ; Occupational hazards ; Pesticides ; Vegetables ; Cultivation ; Surveys / Ghana / Akumadan / Tono
(Location: IWMI HQ Call no: IWMI 613.62 G200 NTO Record No: H040554)
(0.72 MB)
A survey was undertaken to establish the extent of pesticide exposure in a farming community. Cholinesterase (ChE) activity in whole blood was used as a marker for assessing exposure to pesticides. Complete data were gathered for 63 farmers at Akumadan (exposed) and 58 control subjects at Tono, both prominent vegetable farming communities in Ghana, by means of a questionnaire and blood cholinesterase analyses (acetylcholine-assay). Although whole blood ChE was significantly lower in the exposed than the control participants, it was not significantly correlated with either confounders of age, sex, body weight, and height or high risks practices. The high risks practices revealed during the survey included lack of use of personal protective clothing, short re-entry intervals, and wrong direction of spraying of pesticides by hand or knapsack sprayer. About 97% of exposed participants had experienced symptoms attributable to pesticide exposure. The frequent symptoms were reported as weakness and headache. There is the need to review safety precautions in the use and application of pesticides in Ghana.
5 Ntow, W. J.; Drechsel, Pay; Botwe, B. O.; Kelderman, P.; Gijzen, H. J. 2007. The impact of agricultural runoff on the quality of two streams in vegetable farm areas in Ghana. Journal of Environmental Quality, 27p.
Rivers ; Water quality ; Water pollution ; Runoff ; Pesticide residues ; Analysis ; Sedimentary materials ; Vegetables ; Crop production / Ghana / Akumadan / Tono
(Location: IWMI HQ Call no: IWMI 577.6427 G200 NTO Record No: H040556)
(0.07 MB)
6 Ntow, W. J.; Tagoe, L. M.; Drechsel, Pay; Kelderman, P.; Gijzen, H. J.; Nyarko, E. 2008. Accumulation of persistent organochlorine contaminants in milk and serum of farmers from Ghana. Environmental Research, 106: 17–26.
Pesticides ; Organochlorine compounds ; Risks ; Assessment ; Farmers ; Women ; Health hazards ; Occupational hazards / Ghana / Ashanti Region / Offinso District / Kassena-Nankana District / Tono Irrigation Project
(Location: IWMI HQ Call no: IWMI 613.62 G200 NTO Record No: H040557)
In the present study, the concentrations of persistent organochlorine (OC) pesticides such as dichlorodiphenyltrichloroethane and its metabolites (DDTs), hexachlorocyclohexane isomers (HCHs), hexachlorobenzene (HCB) and dieldrin in pooled samples of human breast milk (n ¼ 109), and serum (n ¼ 115) from vegetable farmers in Ghana, during 2005, were determined. Gas chromatography with mass spectrometry was used to quantify residue levels on a lipid basis of the OCs. The pattern of OCs in human fluid showed that DDTs was consistently the prevalent OC in milk and blood. The levels of DDTs, HCHs, and dieldrin in the breast milk samples were found to correlate positively with age of the milk sample donors (rs ¼ 0.606, 0.770, and 0.540, respectively). When blood serum levels of the OCs were compared between male and female farmers, no pronounced relationship for HCHs and HCB (p40.05) was observed. However, DDTs and dieldrin residues were significantly higher (po0.05) in males than in females. There was association between breast milk and serum residues. When daily intakes of DDTs and HCHs to infants through human breast milk were estimated, some individual farmers (in the case of DDTs) and all farmers (in the case of HCHs) accumulated OCs in breast milk above the threshold (tolerable daily intake, TDI, guidelines proposed by Health Canada) for adverse effects, which may raise concern on children health.
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