Daedalea quercina

Oak mazegill

The fungus creates cork and even woody bracket fruiting bodies, spilt and widely attached to the substrate when young and dark brown when old. The surface is pallid brown to greyish brown, slightly zoned. Young pores around the growing edge are round, later on they create a maze-like structure formed by up to 1 mm thick panels in a radial pattern starting in the place of attachment. It infects the tree mostly through wounds. It causes an intense reddish brown heartwood rot. In the advanced stage of the decay, a white syrrocium is formed in wood cracks. The harmful effect is of greater significance in parks and alleys than in the forest environment.

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Symptom

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The fungus creates cork and even woody bracket fruiting bodies, spilt and widely attached to the substrate when young and dark brown when old.

Tree Species: Oak, Chestnut

Part of a plant- attacked: Tree trunk

Pest significance: Very harmful

Pest Category: Fungi

Invasive Species: No

Present in EU: Yes

Pest group: Fungi

Affected part of wood: Heartwood, Sapwood

Depth of damages: More than 5 cm depth, Under bark only, Up to 0,5 cm depth, Up to 2 cm depth, Up to 5 cm depth

The extent of damage: Whole trunk

Prevalence in Europe: Very common

Damaged products: Firewood, Fresh timber logs (water still in the sapwood), Furniture, Lumber, boards and prisms, Wood chips, Wooden house constructions

Roundwood size: Diameter 50+, Diameter from 10 up to 50 cm

Wood discoloration: Yes

Pest subcategory: White-rot