Bjerkandera adusta

Smoky bracket

The caps are mostly arranged roof-like, one above the other. First they are softly prickly, ochre-grey, always with a white edge when young. The pores are irregular, whitish, when pushed they change their colour to greyish brown, later grey to greyish black. The fungus is a saprophyte on dead branches, trunks, and stumps. It can become a parasite when the wounded trunk is infected. The mycelium causes intense white rot of the attacked wood, mostly of heart wood. The mycelium activity in wood can result in drying of the crown and reducing of trunk strength. The fungus is spread from lowlands to mountainous regions.

Map

Symptom

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The presence of light gray caps of fruiting bodies.

Tree Species: Beech, Oak, Hornbeam, Ash, Maple, Alder, Spruce

Part of a plant- attacked: Tree trunk

Pest significance: 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