Yield and Composition of Essential Oils From Eucalyptus citriodora x Eucalyptus torelliana, a Hybrid Species Growing in Congo-Brazzaville.

Essential oils from leaves of E. citriodora and E. torelliana pure species and E. citriodora x E. torelliana hybrids, obtained by hydrodistillation, were analyzed by GC and GC/MS. Six oil samples of E. citriodora showed two main constituents (citronellal 57.1-75.4% and citronellol 8-11%) out of 64 identified constituents (>0.1%). Nine oil samples from E. torelliana contained 78 constituents (> 0.1%) with various main constituents: α-pinene (20.3-78.1%), globulol (20-26%) and citronellyl acetate (55.5%). Six oil samples of E. citriodora x E. torelliana hybrids were of a citronellal/citronellol chemical type (66-76%), like E. citriodora, or α-pinene (24.3-49.5%), or citronellyl acetate (61.4%) chemical type, like E. torelliana. [ABSTRACT FROM AUTHOR]