Abstract The essential oils isolated by hydrodistillation from the leaves of Eucalyptus alba Muell. and Eucalyptus camaldulensis Dehnardt were analysed by GC and GC/MS. The main components identified in E. alha oil were β-pinene (31.0%), α-pinene (20.1%) and limonene (16.8%). The major components of the oil of E. camaldulensis were α-phellandrene (24.8%), 1,8-cineole (19â3%), α-pinene (12.8%) and γ-terpinene (11.8%). Based on yield and composition, these oils are considered as unacceptable for commercial oil production.