Njoroge et al
Greener Journal of Environment Management and Public Safety Vol. 2 (3), pp. 115-120, May 2013.
ISSN: 2354-2276 © 2011 Greener Journals
Manuscript Number: 022313490
Pesticide Preferences and Pattern of Use along the Shore of Lake Naivasha, Kenya
Njoroge Simon Mburu1*, Munyao Thomas Matuku2,
Odipo Osano3, Chege Moses Gichuho4
1*School of Public Health, Moi University, Kenya
2,3,4School of Environmental Studies, Moi University, Kenya
1*Corresponding Author’s Email: njorogesmburu @ gmail. com
Improper pesticide application has resulted in high toxicity levels causing environmental risk. The objective of the study was to determine pesticide preferences and pattern of use in farms along the shore of Lake Naivasha. Interviewer administered questionnaires and researcher observation were used to collect data on pesticides being used and pattern of use in 20 major horticultural farms around Lake Naivasha. Secondary data from journals, standards and materials safety data sheets from manufacturers were also used to determine pesticide properties such as toxicity. The results showed there were 4.3% (6) WHO class I and 14.3% (20) class II pesticides of the 141 pesticides used along the shore of Lake Naivasha. The pattern of pesticide use in the area was moderate to high and all the farms were also using Integrated Pest Management (IPM) to control pests. It was concluded that some pesticides in WHO class I that were being used along the shore of Lake Naivasha (e.g. oxamyl, methomyl and fenamiphos) are very toxic to human beings and aquatic organisms since they cause cholinesterase inhibition poisoning by inactivating the enzyme acetylcholinesterase.
Keywords: Pesticides, Environmental pollution, integrated pest management, Lake Naivasha.