Biscogniauxia mediterranea

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canker caused by Biscogniauxia mediterranea
Source: Wikimedia Commons

Biscogniauxia mediterranea (De Not.) Kuntze 1891

The fungus causes necrosis called "charcoal canker" on stems and branches of hardwood trees, in particular on oak trees. Its life cycle includes an endophytic phase. It is often considered to be a weak pathogens, infecting mainly trees stressed by drought or fire. However, in some parts of southern Europe it has become an aggressive fungus on cork oaks, with the symptoms including discoloured foliage, cracking of the cork and liquid exudates being released from the trunk.

Synonyms:
Hypoxylon mediterraneum