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Toxicity of some essential oils on eggs, larvae and females of Boophilus annulatus (Acari: Ixodida: Amblyommidae) infesting cattle in Egypt

Abdel-Shafy, S. and Soliman, M.M.M.

2004 - Volume: 44 Issue: 1-2 pages: 23-30


essential oil egg larva female cattle ticks Boophilus annulatus


Five essential oils: peppermint (Mentha piperita), spearmint (Mentha viridis), marjoram (Marjorana hortensis), lavender (Lavandula officinalis) and sweet basil (Ocimum basilicum) were tested against embryonated eggs, unfed larvae and fed females of the cattle tick Boophilus annulatus. L. officinalis was more toxic on embryonated eggs (LC50: 0.36%) followed by M. piperita (LC50: 0.39%), O. basilicum (LC50: 0.52%), M. hortensis (LC50: 1.06%) and M. viridis (LC50: 1.20%). Toxicity of oils on unfed larvae decreased gradually from O. basilicum (LC50: 0.05%) to L. officinalis (LC50: 0.69%), M. hortensis (LC50: 0.75%), M. piperita (LC50: 0.77%) and M. viridis (LC50: 0.90%). LC50 of M. hortensis on fed females was 0.52% followed by O. basilicum, M. piperita, L. officinalis and M. viridis that were 1.01, 2.85, 3.25 and 10.57%, respectively. In conclusion these oils had toxic effects on all experimental stages of B. annulatus except of M. viridis was less toxic on fed females.

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2004 Abdel-Shafy, S. and Soliman, M.M.M.
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