Ustilago hordei
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Source: USDA Cooperative Extension Clemson University Slide Series - IPM IMAGES
Ustilago hordei (Pers.) Lagerh. 1889 - (covered smut of barley)
This fungus is widely distributed and infects mainly barley, sometimes also oats. Infections are initiated by teliospores on contaminated seeds which germinate around the same time as the seeds, producing first basidiospores and after a mating process infectious hyphae that penetrate the seedlings. The disease does not become apparent until the grains develop. At that stage, "smutted heads" appear in which kernels are replaced by black smut sori. When the sori rupture, large amounts of teliospores are released that spread by wind, contaminating seeds.
Management relies on planting disinfected seeds or resistant cultivars. Using untreated seeds can result in stunted plants and yield losses.
| Vernacular names | |
|---|---|
| • Deutsch: | gedeckter Brand der Gerste |
| • English: | barley covered smut |
| • Français: | charbon vêtu de l’orge |
Synonyms
Ustilago nigra
Ustilago hordei Bref. (1888) = Ustilago tritici
For details see the respective page in BugwoodWiki.
