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Eucalyptus rust

Scientific Name
Puccinia psidii
Scientific Author
G. Winter
Taxonomy
Urediniomycetes, Uredinales
Status
Exotic Species Establishment in Australia
Reliability
High
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Diagnostic Notes

Symptoms:

 

The fungus attacks young tissues of new leaves, fruits, flowers, shoots and succulent twigs. The first symptoms are chlorotic specks which become, after a few days, pustules containing uredia producing yellow masses of spores. Pustules can coalesce and parts of the plant can be completely covered with pustules. After about 2-3 weeks, pustules dry and become necrotic. The disease can cause deformation of leaves, heavy defoliation of branches, dieback, stunted growth and even death. On fruits of guava (Psidium guava, Psidium spp.), Ruberry (Myrcia spp., Myrciaria spp.) and other native American hosts in the Myrtaceae, the lesions occur mostly on buds and young fruits that eventually rot as the rust matures.

 

 

The fungus:

 

This autoecious fungus has a macrocyclic life cycle, producing aecia, uredinia, telia and basidia. Uredia amphigenous, in groups on brownish or blackish spots up to 5 m

More Information
Specimen Contact
Dr Jose R. Liberato
Author
Liberato JR, Silveira SF, Junghans DT, Rocabado, JA, Aparecido CC & Shivas RG
Created
07/03/2006 02:31 AEST
Last Updated
13/08/2012 13:52 AEST
Citation
Liberato JR, Silveira SF, Junghans DT, Rocabado, JA, Aparecido CC & Shivas RG (2006) Eucalyptus rust (Puccinia psidii ) Updated on 8/13/2012 1:52:25 PM Available online: PaDIL - http://www.padil.gov.au.
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Free for use under the Creative Commons Attribution 3.0 Australia License

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