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Long term survival of Phytophthora cinnamomi in mature Banksia grandis trees in remnant jarrah forest

Collins, S., Shearer, B., McComb, J.A., Colquhoun, I. and Hardy, G.E.St.J. (2003) Long term survival of Phytophthora cinnamomi in mature Banksia grandis trees in remnant jarrah forest. In: Phytophthora in Forests and Natural Ecosystems: 2nd International IUFRO Working Party 7.02.09 Meeting, 30 September - 5 October, 2001, Albany, Western Australia.

Abstract

Effective management of Phytophthora cinnamomi requires knowledge of its ability to survive adverse conditions in soil and plant tissue. We have assessed the long-term survival of P. cinnamomi in Banksia grandis trees over 18 months in jarrah forest in the Southwest of Western Australia. Thirty-six B. grandis trees were killed by underbark inoculation with P. cinnamomi l0cm below ground level. To assess distribution and survival of the pathogen, 4 dead trees were harvested at the time of death and a further 4 at each of 12 and 18 months after death. A further 9 standing dead trees were sampled bi-monthly for 18 months by removing 1 cm diameter cores 10em and 40cm above and below the soil line. P. cinnamomi colonisation of standing dead trees declined over time. The pathogen was isolated from 54% of sample cores 2 months after death, and only 2.4% after 12 months. In the early months after death, there was a higher percentage of recovery of the fungus from cores from above, rather than below ground tissue (eg. after 2 months 61.1% of samples above and 46.4% from below the soil line were colonised), while approximately 12 months later the values were 0.3% of colonised samples above and 4.3% from below the soil.

Publication Type: Conference Item
Murdoch Affiliation: Centre for Phytophthora Science and Management
School of Biological Sciences and Biotechnology
Notes: In: JA McComb, GE StJ Hardy and IC Tommerup (eds), 'Phytophthora in Forests and Natural Ecosystems'. 2nd International IUFRO Working Party 7.02.09 Meeting, Albany, W. Australia 30th Sept - 5th Oct 2001
URI: http://researchrepository.murdoch.edu.au/id/eprint/11226
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