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Potential of Olax zeylanica (Olacaeceae) as a Botanical Insecticide for the Control of the Maize Weevil Sitophilus zeamais Motschulsky

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dc.contributor.author Perera, M.T.H.P.
dc.contributor.author Karunaratne, M.M.S.C.
dc.date.accessioned 2013-04-24T05:36:29Z
dc.date.available 2013-04-24T05:36:29Z
dc.date.issued 2010
dc.identifier.citation Perera, M.T.H.P., & Karunaratne, M.M.S.C. (2010). Potential of Olax zeylanica (Olacaeceae) as a Botanical Insecticide for the Control of the Maize Weevil Sitophilus zeamais Motschulsky. Vidyodaya Journal of Science, 15(1&2), 53-62. en-US
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/1016
dc.description.abstract The possible use of leaf powder of Olax zeylanica in managing the maize weevil, Sitophilus zeamais was investigated in the present study. Mortality of one week old adults was obtained for five different doses each for their insecticidal effect (l.0, 2.0, 3.0, 5.0 and 7.5g) and fumigation toxic activity (2.0, 3.0, 5.0, 7.5, 10.Og) separately. In each bioassay, the mortality was recorded after 3, 6, 9, 12, 18, and 24 hours after they were exposed to different doses of the plant powder. The results of both bioassays revealed that the leaf powder of this plant elicited a very high insecticidal activity as well as fumigation toxic activity in S. zeamais weevils. Mortality effect of the powders on the weevils was found to be dose and time dependent. The observations indicated that the adult mortality increased with the increase of the exposure time and the dose. No mortality was observed 3 hours after the exposure of weevils to leaf powder at all doses. A high mortality rate was observed after 9 hours of exposure with all doses except for the lowest and alOO% mortality was recorded with 7.5g after 24 hours. Fumigation toxicity of plant powder against the weevils also gave similar results where no weevil deaths were observed at all doses of leaf powder after 3 hours of exposure. At the highest dose of 10.Og, 98% mortality was observed after 24 hours. The overall results imply the strong possibility of using leaves of Olax zeylanica as a potent bio-insecticide in protecting maize grains from S. zeamais infestations. en_US
dc.language.iso en en_US
dc.subject Olax zeylanica en_US
dc.subject Sitophilus zeamais en_US
dc.subject Insecticidal effect en_US
dc.subject Fumigation toxicity en_US
dc.subject Adult mortality en_US
dc.subject Leaf powder en_US
dc.title Potential of Olax zeylanica (Olacaeceae) as a Botanical Insecticide for the Control of the Maize Weevil Sitophilus zeamais Motschulsky en_US
dc.type Article en_US
dc.date.published 2010


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