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Biscogniauxia nummularia

Beech tarcrust

Description

The black circular shapes are 0.5 - 2 cm wide, called stroma. They have a carbonaceous consistency, are dull on the surface, and can be dusted with brown conidia when young. Inside this black tree are submerged fruiting bodies, which penetrate the surface through a small hole through which spores enter the environment. On the surface of the branch or trunk are formed in large numbers.

Symptom

The black circular shapes are 0.5 - 2 cm wide, called stroma.

Tree Species: Beech

Part of a plant- attacked: Tree trunk

Pest significance: Less harmful

Pest Category: Fungi

Invasive Species: No

Present in EU: Yes

Seasonal frequency of occurrence

Seasonal frequency of occurrence