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Pests & Diseases > Myrtle Rust

Myrtle Rust on Lilly 

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Myrtle Rust is a new fungus which is closely related to the Eucalyptus/Guava rusts. It produces large amounts of powdery yellow or orange-yellow spores on the plants that have been infected. The fungus causes spots on leaves and eventually leads to curling and shrivelling of its leaves. This often kills new growth. 

  • Myrtle rust has been found on the following species in Victoria: 
  • Lilly Pilly (Acmena smithii) 
  • Lemon Scented-myrtle (Backhousia citriodora) 
  • Bottlebrush (Callistemon viminalis) Lilly Pilly / Scrub Cherry (Sygyium austral) 
  • Black stallion (Lophomyrtus x ralphii) 
  • New Zealand Christmas bush (Metrosideros excelsa Willow myrtle (Agonis flexuosa) 
  • ‘Harkness’ bottlebrush (Callistemon) 


Myrtle Rust is a pathogen which could seriously affect Australia’s native trees, shrubs and potentially forests. If you would like to know more about myrtle rust please go to:


Keep an eye on foliage surrounding yu growing area and remove any infected plants that are in your yard. 


Destroy and burry the plants. Please go to for more information. Alternatively, you can r eport any sightings to the Department of Primary Industries on the Exotic Plant Pest Hotline on 1800 084 881.