Efficacy of plant essential oils against two major insect pests of coffee (Coffee berry borer,Hypothenemus hampei,and antestia bug,Antestiopsis intricata) and maize weevil,Sitophilus zeamais |
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| Authors: | Esayas Mendesil Mekuria Tadesse Merid Negash |
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| Institution: | 1. Department of Horticulture and Plant Sciences , College of Agriculture and Veterinary Medicine, Jimma University , P. O. Box 307, Jimma , Ethiopia emendesil@yahoo.com;3. Ethiopian Institute of Agricultural Research , P. O. Box 2003, Addis Ababa , Ethiopia;4. Department of Neuroethology , Max Planck Institute for Chemical Ecology , Hans-Kn?ll-Stra?e 8, D-07745, Jena , Germany |
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| Abstract: | Coffee berry borer, antestia bug and maize weevil are serious pest of coffee and maize, respectively. Bioassays of plant essential oils were conducted with coffee berry borer, antestia bug and the maize weevil. Essential oils of Thymus vulgaris, Aloysia sp., Ruta chalepensis, Chenopodium ambrosioides and Cymbopogon nardus resulted in 80%–90% mortality of coffee berry borer, whereas essential oils of C. ambrosioides, T. vulgaris and R. chalepensis achieved 87.5%–92.5% mortality of antestia bug. Essential oils of C. ambrosioides caused significantly the highest percentage mortality of the maize weevils (95%) with “Lethal Dose” (LD50) values of 2.202 ml 100 ml?1 within 24 h after treatment, whereas essential oils of Mentha spicata, T. vulgaris and R. chalepensis resulted in 82.5%, 77.5% and 73.5% mortality, respectively. The potential of plant essential oils for the management of coffee berry borer, antestia bug and maize weevil for the small-scale farmers is discussed. |
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| Keywords: | antestia bug bioassay coffee berry borer maize weevil plant essential oils |
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