Applied Entomology and Zoology
Online ISSN : 1347-605X
Print ISSN : 0003-6862
ISSN-L : 0003-6862
Regular Papers
Chemical composition and insecticidal potential of essential oils from Egyptian plants against Sitophilus oryzae (L.) (Coleoptera: Curculionidae) and Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)
Magdy I. E. MohamedSamir A. M. Abdelgaleil
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2008 Volume 43 Issue 4 Pages 599-607

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Abstract

Essential oils of eight plants growing in Egypt were isolated by hydrodistillation. The chemical composition of the isolated oils was examined by gas chromatography/mass spectrometry (GC-MS). In the contact toxicity assay, the oils of Mentha microphylla and Artemisia judaica were the most potent against Sitophilus oryzae. When tested against Tribolium castaneum, the oils of M. microphylla, Eucalyptus camaldulensis and A. judaica showed the highest activity among the test oils with M. microphylla being the most potent. In the fumigant assay, the oil of M. microphylla displayed the strongest insecticidal activity against S. oryzae (LC50=0.21 μl/L), while the oils of Lantana camara (LC50=29.47 μl/L) and E. camaldulensis (LC50=30.81 μl/L) revealed good activity. In the case of T. castaneum, the oil of M. microphylla (LC50=4.51 μl/L) was the most effective, followed by Citrus reticulata (LC50=19.47 μl/L) and Schinus terebenthifolius (LC50=20.50 μl/L). The most interesting finding in this study is the potent contact and fumigant toxicity of M. microphylla oil against S. oryzae and T. castaneum. These results suggested that M. microphylla oil could be used as a potential control agent for S. oryzae and T. castaneum.

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© 2008 by the Japanese Society of Applied Entomology and Zoology
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