There are over 50 different forms of Pythopthera (Greek = Plant Destroyer). These water moulds are carried in soil and spread through poor hygiene of people, animals and machines or by movement of water. Many of these species of Phytopthera are only recently identified and little is known of some impacts within Perth bushland. Over 40% of the species found on the Swan Coastal Plain are impacted by these biological bulldozers and currently there is no known cure.
What can we do to limit its spread?
At home by using potting mixes and mulches with the Australian Standards ticks (Red are premium grade and black ticks are for regular grade) we are able to ensure the mix is pathogen free.
All compost should be kept at a minimum of 70 degrees for 72 hours to achieve a pathogen free material. Ensure all plant material is either composted as mentioned above or placed out for verge collection or in residential rubbish bin, this is then composted at a recycling centre and on sold to the soil suppliers in Perth.
In urban bush land and natural areas stick to the designated paths and keep away from planted areas and keep dogs on leads near bush land areas.