Eucalyptus radiata

McLean, S., Foley, W. J., Davies, N. W., etal. (1993). Metabolic fate of dietary terpenes from Eucalyptus radiata in common ringtail possom Pseudocheirusperegrinus).JournalofChem-icalEcology 19,1625-1643. 

The main essential oil-producing species of Eucalyptus include Eucalyptus globulus, also called blue gum eucalyptus Eucalyptus dives, known as broadleaved peppermint eucalyptus Eucalyptus citriodora, known as lemon-scented eucalyptus Eucalyptus radiata, known as narrow-leaved peppermint gum Eucalyptus smithii, known as gully gum and Eucalyptus polybractea, known as blue mallee. Within each species there are many subspecies and chemo-types. This illustrates a very complex situation, producing essential oils with varying compositions and properties. 

The GC analysis shows samples of Eucalyptus citriodora (Fig 7.12) and Eucalyptus radiata (Fig 7.13). Both of these traces show that published data are not always found in actual samples of essential oil. The Eucalyptus citriodora shows a high level of citronellal (73.94%), while the Eucalyptus radiata has a high level of 1,8-cineole (76.37%) both of these are higher than in the published data. However, for Eucalyptus radiata values of 1,8-cineole... 

Figure 7.13 Eucalyptus. Analysis of an Australian sample of Eucalyptus radiata. The level of 1,8-cineole is quite high, 76.37%. The quoted range is 64-75%. Levels above 75% indicate Eucalyptus globulus or another variety. Courtesy of Jenny Warden, Traceability.

Nishimura, H., D.M. Paton, and M. Calvin, 1980. Eucalyptus radiata oil as a renewable biomass. Aerie. Biol. Chem., 44 2495-2496. 

Eucalyptus radiata Eucalyptus Narrow-leaved peppermint Blue mallee <20 <20 <20... 

Santalum spicatum Prostanthem melissifolia Leptospermum petersonii Melaleuca alternifolia Agonisfragram Melaleuca ericifolia Melaleuca quinquenervia Eucalyptus citriodora Eucalyptus polybractea Eucalyptus staigeriana Eucalyptus radiata... 

For the oils tested against Culex quinquefasciatus, the MPTs ranged from 20 to 100 minutes with the longest, 100 minutes, provided by Corymbia citriodora, which was significantly (FIO, 32 = 4.46, p = 0.002) greater than Prostanthera melissifolia, Agonisfragrans, Eucalyptus polybractea. Eucalyptus radiata, Melaleuca ericifolia, Melaleuca quinquenervia, and Santalum spicatum. 

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