Olearia Phlogopappa : aspects of clonal cultivation and essential oil characterisation

TL;DRAbstract

The species Olearia phlogopappa was found to exhibit variation in both form and essential oil properties in populations around Tasmania. Six locations, Great Lake, Paradise Plains, Mount Wellington, Eaglehawk Neck, Elephant Pass and Buckland, were surveyed for a plant which yielded maximal quantities of organoleptically suitable essential oil from each site. Some preliminary morphological, dry matter and infra-red photographic studies were carried out which revealed a positive relationship between the rate of dry matter accumulation and height measurements. This, together with a small scale seasonal variation trial led to the development of multi-location trials. A rank order of clones was established on the basis of growth rate and oil yield. The major source of oil appeared to be the juvenile leaves in all cases. The effect of harvest was studied at two trial sites. A combination of a pruning trial and seasonal variation trials led to the recommendation that Olearia phlogopappa clone

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