Toxicity of Cymbopogon nardus (Glumales: Poacea) against four stored food products insect pests
Journal Title: International Journal of Farming and Allied Sciences - Year 2014, Vol 3, Issue 8
Abstract
Trials on insecticide effects of Cymbopogon nardus Linnaeus (Glumales: Poacea) on four stored food products beetles show that the essential oil has a greater insecticidal activity than the saturated ethanol extract. Tests by topical application to adult insects and by contact with filter paper show that the essential oil of C. nardus causes a higher mortality than the total ethanol extract in individuals of Cryptolestes sp (Coleoptera, Cucujidae), Palorus subdepressus Wollaston (Coleoptera: Tenebrionidae), Rhyzopertha dominica (Fabricius) (Coleoptera: Bostrychidae) and Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae). The analysis of the essential oil of C. nardus by gas chromatography coupled with mass spectrometry (GC-MS) shows high rates of citronellal (29.2%), citronellol (12.7%), geraniol (29.3%), elemol (5.0%) and limonene (4.1%) compared to the essential oil of C. citratus (another insecticide plant) which contains mostly citral (neral (27.3%) + geranial (32.2%)) and myrcene (17.21%). Terpene hydrocarbons (monoterpenes and sesquiterpenes) and oxygen derivatives (aldehydes and alcohols) are the basis of the biocidal activity of C. nardus.
Authors and Affiliations
Mamadou Doumbia, Kouassi Yoboue, Lucien Konan Kouamé, Kanko Coffi, Dagobert Kouadio Kra, Koffi Eric Kwadjo, Bleu Gondo Douan and Mamadou Dagnogo
Keywords
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