Bjerkandera fumosa

Big smoky bracket

Bjerkandera is named in honor of C. Bjerkander; fumosa means “smoky” in reference to the pore surface. Caps are 3–15 cm wide; 2–10 cm long; 0.5–2 cm thick. Buff to smoky-gray, bruising darker; pores 2–5 per mm. Saprobic; solitary or in overlapping clusters on dead deciduous wood; July through November, year-round. Compared to Bjerkandera adusta, Bjerkandera fumosa is thicker and generally has a lighter pore surface. Overholts reports Bjerkandera fumosa has an anise scent or a disagreeable odour.

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Presence of spilled light gray fruiting bodies on the trunk of deciduous trees.

Tree Species: Poplar, Willow

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: 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: 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