Ceratobasidium cereale

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Ceratobasidium cereale symptoms on oat culm (click on image to enlarge it)
Author(s): Elizabeth Bush, Virginia Polytechnic Institute and State University, Bugwood
Source: IPM Images
Ceratobasidium cereale symptoms on wheat stems (after removing the leaf sheaths) (click on image to enlarge it)
Author(s): Paul Bachi, University of Kentucky Research and Education Center
Source: IPM Images

Ceratobasidium cereale (D. Murray & L.L. Burpee 1984 - (sharp eyespot disease of cereals)

The fungus is soil-born and has bi-nucleate hyphal cells. It is wide-spread, causing sharp eyespot (which may be also associated with Rhizoctonia solani) as well as root and stem rot diseases on cereals. The disease is mainly found in temperate regions and may result in serious yield losses. The typical eyespot symptoms occur on the basal leaf sheaths and stems and are elliptical with sharp borders and yellow centres.

Synonyms:
Ceratorhiza cerealis
Rhizoctonia cerealis