Hypoxylon Canker

Canker Diseases - Hardwoods

Hypoxylon Canker

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Canker on aspen stem caused by Entoleuca mammata.

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Saperda insect galls and stem infected with Hypoxylon canker (branch on left).

Hypoxylon Canker

Perithecia are produced on the older cankers.

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Perithecia of Entoleuca mammata in stroma produced on the surface of an old canker. A part of the stroma has been cut away to show the base of the perithcia within the stroma. Asci produce ascospores that cause infection in wounds made on aspen.

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Conidial pillars and areas producing asexual spores of Entoleuca mammata on surface of canker. Conidia do not appear to have a role in infection.