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Assessing the survival, sporulation and pathogenicity of P.cinnamomi within water bodies on a mine site: a risk assessment based approach and implications for on-ground management

Williams, N., Paap, T., Dunstan, W. and Hardy, G. (2010) Assessing the survival, sporulation and pathogenicity of P.cinnamomi within water bodies on a mine site: a risk assessment based approach and implications for on-ground management. In: Dieback Information Group Conference ('10), 16 July, Perth, Western Australia.

Abstract

It is often assumed that Phytophthora species accumulate in streams, lakes and manmade reservoirs from infestations within the water catchment. Based on the pathogen's biology, it has been assumed that any inoculum present in large water bodies poses a risk for the spread of the pathogen to non-infested areas. However, despite water being an essential factor in the pathogen's biology, it is poorly understood how well Phytophthora species and in particular P. cinnamomi survive and sporulate in water bodies with different chemical profiles or at different times of the year. Furthermore, water baiting studies have shown that P. cinnamomi is rarely isolated directly from high volume water bodies draining directly from areas known to be infested with P. cinnamomi.

This study investigated the growth of P. cinnamomi in seven water bodies within a single mine site to asses the associated risks of spreading P. cinnamomi during operational activities. Each water body varied in terms of the organic particulates and dissolved chemicals due to different underlying soil types, water influx and water recycling regimes. Water quality was shown to have a significant impact on the sporulation, infection of available plant material and survival of P. cinnamomi in the water across the seven water bodies tested. The experimental findings and implications of this research for on ground management will be discussed.

Publication Type: Conference Item
Murdoch Affiliation: School of Biological Sciences and Biotechnology
URI: http://researchrepository.murdoch.edu.au/id/eprint/11848
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