Where does it occur? 

Australia

The current area of native vegetation infested with Phytophthora d ieback exceeds many hundreds of thousands of hectares in Western Australia , Victoria and Tasmania and tens of thousands of hectares in South Australia . The disease is often cryptic in New South Wales and far north Queensland where the extent of the threat is not clear, however concerns are increasing about the impact of Phytophthora d ieback in areas of high conservation value.

The broad areas of infestation that have been mapped in the past has amounted to millions of hectares and involved hundreds of thousands of kilometres of borders with uninfected communities. The ability to map the infestations is dependent on the availability of skilled professionals and adequate resources to undertake the mapping. Mapping the distribution of Phytophthora dieback elsewhere in Australia , particularly in areas not severely affected, is not practical owing to sampling difficulties and costs.

It is also important to note that Phytophthora d ieback is known to occur in coastal Queensland . Although considered to be restricted to the wet coastal forests, many of these areas are designated as conservation reserves or state forest and are managed for recreation and conservation purposes. Visitor access that can lead to further spread of Phytophthora dieback is a significant issue that will need to be addressed.