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Wheat smut

Scientific Name
Ustilago tritici
Scientific Author
(Pers.) Rostr.
Taxonomy
Basidiomycota, Ustilaginomycetes, Ustilaginales, Ustilaginaceae
Status
Exotic establishment in Australia
Reliability
High
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Diagnostic Images

Host symptoms
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Caption
Ustilago tritici on Triticum aestivum - BRIP 11860. Scale bar = 1 cm
Source
Roger Shivas DEEDI
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Diagnostic Images (3)
Diagnostic Notes
Sori in spikelets, dark olivaceous brown, dusty (loose smut), usually destroying all floral parts, leaving behind only the naked rachis (in rye usually only parts of the lower spikelets are destroyed); occasionally also as striae on leaves, sheaths and culms.

Spores globose to subglobose or ovoid, 6–9 × 5–7 µm diam., olivaceous brown, paler on one side, minutely echinulate.

Spore germination: Basidia septate, 4-celled. On artificial media and in nature fusion between compatible basidial cells gives rise to dikaryotic hyphae that infect the host via the ovary at flowering, resulting in a systemic disease.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
17/12/2010 02:33 AEST
Last Updated
17/12/2010 14:33 AEST
Citation
Roger Shivas (2010) Wheat smut (Ustilago tritici ) Updated on 12/17/2010 2:33:52 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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