Phaeolus schweinitzii

Schweinitzii root and butt rot

Fruiting bodies are bulky, 10-30 cm wide, annual, growing commonly on both older and young trees from June until October. The surface is irregularly bumpy, finely pubescent, sulphur-yellow at first, later brownish orange, rusty-brown to blackish brown. The pores are sulphur-yellow, later greenish yellow, rusty to brown. Young fruiting bodies turn brown when pushed down. They do not grow in litterfall or mineral soil, instead they grow on decaying as well as on living roots, stumps and trunks. The mycelium causes intense red-brown heartwood rot producing a strong turpentine scent.

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Symptom

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Fruiting body on the trunk. The surface is irregularly bumpy, finely pubescent, sulphur-yellow at first, later brownish orange, rusty-brown to blackish brown. The pores are sulphur-yellow, later greenish yellow, rusty to brown. Young fruiting bodies turn brown when pushed down.

Tree Species: Pine, Douglas Fir, Spruce, Larch

Part of a plant- attacked: Tree trunk, Roots

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: Common

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