Plant seedlings of specimens from the garden of medicinal plants (Lageado Farm, UNESP) were cultivated at the Institute of Biosciences. The plant was identified in the BOTU Herbarium, Department of Botany, UNESP, where a voucher specimen (#23031) had been deposited. Leaves of Cymbopogon citratus were collected between May and June of 2008 and immediately processed to obtain the EO.