"Phytophthora dieback is a devastating plant disease of native plants, horticultural crops and garden plants worldwide. Phytophthora dieback is caused by the water mould, Phytophthora cinnamomi. There are over 60 species of Phytophthora, but the species that causes the most severe and widespread damage to native plants in WA is P. cinnamomi."
Phytophthora cinnamomi is a soil-borne organism known to cause root-rot disease of which almost half of Australian flora species are susceptible. Banksias, grass trees dryandras, leucopogons, hibbertias and many other plants of the forests, woodlands and coastal heaths and wetlands are destroyed by this form of dieback.
The appearance of dead foliage is a sign of it’s progression in trees and other vegetation. An aggressive threat, it is a huge problem in the South Coast area.
This vegetation loss destroys unique habitat for many mammal and bird species, which depend on the eucalypt forests and woodlands and the montane heathlands of the South Coast for their food and shelter. Phytophthora cinnamomi spreads through the transference of affected soil and invades plant roots and stems. We have spread dieback by transporting mud in our boots, tyre treads and other gear.
Make sure you have checked each item and washed all mud before and after travelling through an area (even if it is not an identified affected area). Follow all directions on signage, use wash down stations where provided and avoid all known dieback areas.