Sighting 3378539
Hollyhock rust at Hughes, ACT
Identification history
| Puccinia malvacearum | 11 Jul 2017 | KenT | ||
| Puccinia malvacearum | 11 Jul 2017 | KenT | ||
| Unidentified | 10 Jul 2017 | ruthkerruish |
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User's notes
Rust (Puccinia malvacearum) on Malva parviflora. Some of this rust occurs every year in late spring and early summer particularly during wet weather.
2 comments
KenT
wrote:
11 Jul 2017
Puccinia malvacearum is one of a number of rust fungi in the genus Puccinia that have been reported from the genus Malva (see Demers etal. 2015, Farr & Rossman 2017). Worldwide, Puccinia malvacearum is known from 100 host plants including several native Australian plants (Farr and Rossman 2017) and from what I can see is the only rust species reported from Malva parviflora in Australia. I get Malva parviflora growing as weeds in the garden and they often get this rust in a wet spring/summer. Normally I like to see some microscopic details of spores to be able to distinguish rust species, but in this case this is something I’m familiar with and your image accords with what I’ve seen for this species. It is possibly the only pathogen reported for Malva parviflora in Australia, unfortunately the Australian Plant Disease Database is not accessible to the public so I can’t search it. References: Demers J.E., Romberg M.K., Castlebury L.A. (2015) Microcyclic rusts of hollyhock (Alcea rosea) IMA FUNGUS · 6(2): 477–482. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681263/pdf/ima-6-2-477.pdf
Farr D.F., & Rossman A.Y. (2017) Fungal Databases, U.S. National Fungus Collections, ARS, USDA. https://nt.ars-grin.gov/fungaldatabases/fungushost/fungushost.cfm
Farr D.F., & Rossman A.Y. (2017) Fungal Databases, U.S. National Fungus Collections, ARS, USDA. https://nt.ars-grin.gov/fungaldatabases/fungushost/fungushost.cfm
MichaelMulvaney
wrote:
11 Jul 2017
Ken - I have copied your comment to the species page of this rust
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Nearby sightings
Location information
- Coordinates 149.098742-35.339030
- Maps Hughes Garran Woodland Red Hill to Yarralumla Creek
- Places Hughes, ACT
Sighting information
- 18 Abundance
- 25 Nov 2005 11:07 PM Recorded on
- ruthkerruish Recorded by
Species information
- Puccinia malvacearum Scientific name
- Hollyhock rust Common name
- Not Sensitive
- Exotic
- Non-Invasive
- Machine learning
- External link More information
