1Department of Plant Protection, Agricultural Faculty, Urmia University, Urmia, West Azarbaijan, Iran. P.O. Box 57135-165.
2Department of Plant Protection, Agricultural Faculty, Mohaghagh Ardabili, Ardabil, Iran.
*Corresponding address: Asgar Ebadollahi, email: Asghar.ebadollahi@gmail.com, Tel: +989192436834, Fax:0441-2779558
The chemical composition of the essential oils of L. stoechas and E. globulus were studied by gas chromatography mass spectrometry. 1,8-cineole (31.42% in the E. globulus oil and 10.10% in the L. stoechas oil) identified as the major components in the oils. The insecticidal effects of the essential oils were evaluated by fumigation method. Probit analysis showed that the larvae and eggs were more susceptible to the L. stoechas oil than to the E. globules oil at 24 h exposure time. In contrary, adults and pupae were more susceptible to E. globules oil than L. stoechas oil. Mortality increased as the doses of essential oils and exposure times increased. These findings revealed the strong insecticidal activity of essential oils of L. stoechas and E. globulus and it may be used in grain storage against T. castaneum in order to decrease detrimental effects and risk of utilization of synthetic insecticides.
Essential oils, L. stoechas, E. globulus, T. castaneum
