Myrtle rust

Myrtle rust is a fungal disease caused by the pathogens Uredo rangelii or Puccinia psidii. The Myrtle Rust National Management Group concluded it is not possible to eradicate it from Australia. The disease will continue to infect susceptible plants, due to the large number of spores spread by the wind.

Myrtle rust causes brown to grey spots, often with a red-purple halo to appear on both sides of the plants leaves. The spots, and subsequent spores, can form on new leaves, shoots, fruits and flowers. In 2 to 3 days, these spots turn a bright yellow or orange-yellow colour due to the production of spores on the spot's surface.

The ability of susceptible plants to overcome the disease varies. We treat all plants infected with myrtle rust on Council land in line with the management of trees in our Council-controlled land policy. We make every effort to preserve and protect existing trees within road reserves and parks. In some cases, tree removal is the appropriate option.

If you have any questions about the health of plants on Council land that are infected with myrtle rust, please contact us on 07 5667 5974.

Biosecurity Queensland is leading the State Government's response to the disease. If you suspect that you have myrtle rust, notify Biosecurity Queensland on 13 25 23.

Tips to reduce myrtle rust impact

• Always buy healthy plants – inspect the foliage and stems before you buy. Never buy plants that look sick.
• Buy certified mulch that has been composted to Australian standards.
• Always clean equipment after pruning each myrtaceous plant. Scrape or brush off excess dirt, then wash in detergent and let dry.
• Wash clothes that have been in contact with potentially diseased material to avoid transferring myrtle rust spores between gardens, bushland, parks and nurseries.
• Regularly check myrtaceous plants in or near your garden.
• Avoid watering in the afternoon. Wet plants are more prone to fungal attack.
• Seek advice on mineral nutrition and soil condition. Healthy plants can reduce fungal attack.
• Remove and dispose of diseased plants or plant parts by putting them in a bag and placing in the general waste bin, not into the green organics bin.
• Do not compost diseased plants as spores may survive and reinfect plants.

We acknowledge the assistance of the Department of Agriculture and Fisheries in preparing this information.