Myrtle Rust (Uredo rangelii) is a newly detected fungus that is closely related to the Eucalyptus/Guava rusts



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What is Myrtle Rust? 

Myrtle Rust (Uredo rangelii) is a newly detected fungus that is closely related to the Eucalyptus/Guava rusts. 

These rusts are 

serious pathogens which affect plants in the family Myrtaceae including many iconic Australian 

natives like willow myrtle (Agonis sp.), bottle brush (Callistemon sp.) and turpentine trees (Syncarpia glomulifera).

Myrtle Rust infects leaves of susceptible plants producing spore-filled lesions on young actively growing leaves 

and shoots, as well as fruits and sepals. Leaves may become buckled or twisted as a result of infection. Severe 

rust disease in young trees may kill shoot tips, causing loss of leaders and a bushy habit.

On turpentine and callistemon rust lesions are purple, with masses of bright yellow or 

orange-yellow spores. Older lesions may contain dark brown spores.

Rust spores travel very long distances on the wind and may infect stands of susceptible plants many kilometres 

from the original infestation. Humans can also easily spread Myrtle Rust in infested plant material including cut 

flowers and nursery stock, on clothing and dirty equipment including containers 

and pruning shears and on contaminated timber products. 

Myrtle Rust on 

broad leaved 

paperbark

BIO-SECURITY ALERT

Australian plants under threat from

 MYRTLE RUST 

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Photos courtesy of NSW Department of Industry and Investment.



To make a report email  

bushland@hornsby.nsw.gov.au

 or call 

9847 6832

For more information visit www.dpi.nsw.gov.au/biosecurity/plant/myrtle-rust


Several recent cases of  

Myrtle rust are a direct result 

of careless bio-security 

practice when working with 

Myrtaceae plants.

Garden plants

Acmena sp. (lilly pilly) 

Agonis flexuosa (Willow myrtle)

Austromyrtus inophloia (Aurora and Blushing beauty)

Backhousia citriodora (lemon-scented myrtle) 

Callistemon salignus (willow bottlebrush) 

Callistemon (St Mary MacKillop) 

Chamelaucium uncinatum (Geraldton wax)

Choricarpia leptopetala (Brown myrtle or rusty turpentine)

Leptospermum rotundifolium (Tea tree) 

Lophomyrtus x ralphii (Red Dragon and Black Stallion)

Lophomyrtus bullata (Rainbow’s end)

Metrosideros collina (Dwarf tahiti)

Metrosideros sp. (NZ Christmas bush)

Melaleuca linariifolia (Claret tops)

Rhodomyrtus psidioides (Native guava) 

Syzygium leumannii (Lilly pilly)

Syzygium luehmannii x Syzygium wilsonii ‘Cascade’ (lilly pilly)

Syzygium jambos (Rose apple)

Syzygium australe (Meridian midget) 

Syzygium anisatum (Aniseed myrtle) 

Xanthostemon chrysanthus (Golden penda)

Myrtle Rust on scrub turpentine (below)

Bushland plants

Backhousia myrtifolia (Grey myrtle) 

Callistemon viminalis (Bottle brush)

Eucalyptus pilularis (Blackbutt)

Eucalyptus deanei (Deane’s blue gum)

Eucalyptus agglomerata (Blue-leaved stringybark) 

Melaleuca quinquenervia (Broad-leaved paperbark)

Rhodamnia rubescens (Scrub turpentine)

Syncarpia glomulifera (Turpentine)

Tristania neriifolia (Water gum)

Close-up of Myrtle Rust on turpentine leaves

CURRENTLY INFECTING

Hornsby Shire Council

296 Pacific Highway, Hornsby 2077

PO Box 37, Hornsby NSW 1630

Telephone 9847 6666

www.hornsby.nsw.gov.au

To make a report call Council’s Bushland  

and Biodiversity Team on 

9847 6832

 or 

email 


bushland@hornsby.nsw.gov.au

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INSPECT THE SITE 

And if you find Myrtle Rust:

-   REPORT to the Council’s Bushland and Biodiversity 

Team on 9847 6832 

-   TAKE A PHOTO and send to 

bushland@hornsby.nsw.gov.au

PROTECT AGAINST SPREADING 

•  Don’t take a specimen or move the plants off the site

•  Shut down the work site

•  Change into clean garments and wash face and 

hands, boots, the vehicle and equipment

•   Don’t move to a clean site in infected clothes

•  Always regularly launder clothes, hats and gloves 

and spray or dip boots in 70% methylated spirits or 



benzyl alkonium chloride (surface disinfectant)

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bushland-and-biodiversity -> Acmena smithii- lillypilly Family: Myrtaceae Common Name
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