Ascodichaena rugosa
Ascodicheana fungus
Description
A parasitic fungus infecting only a cork layer of the bark. It takes out nutrients from the tree with haustoria that colonize young living phellem cells formed by phellogen. The tree reacts by increased formation of cells, which leads to coarsening the bark. The fungus is of little significance; it is not needed to take any control measures. It usually occurs on bark at the asexual stage.
Symptom
Black rough spots on the bark.
Tree Species: Beech
Part of a plant- attacked: Tree trunk
Pest significance: Less harmful
Pest Category: Fungi
Invasive Species: No
Present in EU: Yes
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