Abstract
A systematic survey has been made of the large but confined area of Wilson's Promontory National Park. Areas of die-back disease and the associated pathogen Phytophthora cinnamomi Rands have been located, tested and accurately mapped. This has enabled extension of the disease to be forecast. Detailed evidence is provided of the distribution of the pathogen with infected road-making gravel, or from tracked vehicles, and of the viability of inoculum present in gravel. Experiments in control of an outbreak have shown the difficulties inherent in controlling a soil pathogen in an environment which may favour pathogen rather than host and which contains a wide range of susceptible plants.
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