Pitted sap rot
- Latin name: Trichaptum abietinum (Dickson:Fr.) Ryvarden
- French name: Carie blanche de l'aubier
- Division: Basidiomycota
- Class: Aphyllophorales
- Synonym(s): Coriolus abietinus (Dickson:Fr.) Quél.,
Hirshioporus abietinus (Dickson:Fr.) Donk,
Polyporus abietinus (Dickson:Fr.) Fr.,
Polystictus abietinus (Dickson:Fr.) Cooke
Description
Micro-habitat(s)
Trunk
Distribution
Canada
Damage, symptoms and biology
The fungus is of primary importance as a deteriorating agent but is also capable of causing sap rot and heart rot in living trees. Extensive decay of sapwood is indicated by the presence of fruiting bodies. It has been reported to have caused decay in unseasoned wood in service.
Other information
The decay caused by this fungus is restricted to the sapwood; fruiting bodies often form a complete ring on the sapwood of the cut ends of logs. The fruiting bodies of T. abietinum could be confused with those of Stereum sanguinolentum. The hymenium of the latter will turn red when bruised. Earlier taxonomic treatments of T. abietinum were broad, and included fungi now recognized as separate species (T. fuscoviolaceum and T. laricinum).
Canadian Forest Service Publications
Information on host(s)
Main host(s)
Amabilis fir, arbutus, balsam fir, black spruce, Engelmann spruce, grand fir, mountain hemlock, ponderosa pine, red spruce, Rocky Mountain Douglas-fir, scots pine, shore pine, Sierra redwood, Sitka spruce, subalpine fir, western hemlock, western larch, western redcedar, western white pine, whitebark pine, white spruce
Secondary host(s)
Eastern hemlock, eastern white pine, jack pine, red pine, tamarack
Photos
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Old fruiting bodies of T. abietinum with algae growing on the upper surface
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The ridged pore layer of T. abietinum fruiting bodies
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A mass of fruiting bodies in typical abundance on a dead Douglas-fir stem
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