Blend effects in the toxicity of the essential oil constituents of Ocimum kilimandscharicum and Ocimum kenyense (Labiateae) on two post-harvest insect pests
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Date
2011-06
Authors
Hassanali, Ahmed
Bekele, Jembere
Journal Title
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Abstract
The lethal toxicity of major components of the essential oils of Ocimum kilimandscharicum and O. kenyense and of selected blends of these against Sitophilus zeamais and Rhyzopertha dominica were compared with those of the full blends of the essential oils. The compounds were assayed in amounts and proportions present in the minimum 100% lethal dose of the oils. Whereas a major component of O. kilimandscharicum was found to be largely responsible for the toxic action of its essential oil against R. dominica, the results with the other treatments indicated that the toxic action of the essential oils were due to the combined effects of different components, either with or without significant individual toxic action of their own against the insects. The significance of the results and their implication in screening and using plants and their phytochemicals for pest and microbial control are highlighted.
Description
http://dx.doi.org/10.1016/S0031-9422(01)00067-X
Keywords
Ocimum kilimandscharicum, O. kenyense, Labiateae, Sitophilus zeamais, Rhyzopertha dominica, Essential oils, Blend effects, Synergism
Citation
Phytochemistry Volume 57, Issue 3, June 2001, Pages 385–391