Abstract
The insecticidal activity of essential plants oils against an important insect pest of fruit trees, the hairy rose beetle, was evaluated in topical and feeding applications in the laboratory. Essential oils that caused more than 50% mortality were further tested against the hairy rose beetle and the honey bee using different concentrations and their relative toxicities were evaluated. Results showed that eucalyptol and fir oils outperformed other tested oils and caused 72 and 64% mortality, respectively. These mortalities were not different from the application of the commercial insecticide, Deltamethrin. Moreover, eucalyptol and fir oils were more toxic to the hairy rose beetle than the dominant pollinator during fruit trees flowering, the honey bee. However, eucalyptol was relatively safer to the honey bees than fir oil. These findings indicate that eucalyptol might be applied during fruit trees bloom to control the hairy rose beetle even in the presence of honey bees if used for the crop pollination.
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