Poria weirii

Phellinus weirii
Fruit bodies of Phellinus weirii
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Hymenochaetales
Family: Hymenochaetaceae
Genus: Phellinus
Species:
P. weirii
Binomial name
Phellinus weirii
(Murrill) Gilb. (1974)
Synonyms[1]
  • Fomitiporia weirii Murrill (1914)
  • Fuscoporia weirii (Murrill) Aoshima (1953)
  • Inonotus weirii (Murrill) Kotl. & Pouzar (1970)
  • Phellinidium weirii (Murrill) Y.C.Dai (1995)

Phellinus weirii is a species of fungus. It is the plant pathogen that causes laminated root rot in certain conifers, typically Douglas-fir and western redcedar.[2] It is widespread in the Douglas-fir growing regions of British Columbia, Washington and Oregon.[3]

Symptoms of Phellinus weirii

Phellinus weirii root rot is recognized first by the symptoms it induces in its hosts. Reduced terminal growth is usually the first symptom to appear, followed by yellowing (chlorosis) and thinning of crowns.

Overview

Losses due to the fungus are estimated at 4.4 million m3 (157 million ft3) of timber in the Northwestern United States and in British Columbia.[4]

Reduced growth rate is an attribute of tree infection.[5] Particular attention is invited to the growth ring patterns visible in the images attached.

  • Moderately advanced infection
    Moderately advanced infection
  • Close up of Phellinus weirii infection at Apiary, Oregon
    Close up of Phellinus weirii infection at Apiary, Oregon
  • Hollow log at stump level---An extreme case of infection
    Hollow log at stump level---An extreme case of infection
  • View of long butt showing reduced rot a few feet up from the stump
    View of long butt showing reduced rot a few feet up from the stump

References

  1. ^ "GSD Species Synonymy: Phellinus weirii (Murrill) Gilb". Species Fungorum. Kew Mycology. Retrieved 2017-01-23.
  2. ^ Natural Resources Canada. "Laminated root rot". Archived from the original on September 2, 2006. Retrieved 2008-10-04.
  3. ^ "Forest Pathology: Laminated Root Rot". Canadian Forest Service. Archived from the original on 2007-04-15. Retrieved 2007-07-16.
  4. ^ "Laminated Root Rot of Western Conifers". U.S. Department of Agriculture. Retrieved 2007-07-16.
  5. ^ "Introduction : Laminated root rot, caused by the fungus Phellinus weirii (Murr.) Gilb., is widespread in southern British Columbia, Washington, Oregon, northern California, western Montana, and northern Idaho" (PDF). Fs.fed.us. Retrieved 2022-03-24.