Coniferiporia weirii
{{Short description|Species of fungus}}
{{Speciesbox
| image = Phellinus weirii.jpg
| image_caption = Fruit bodies
| genus = Coniferiporia
| species = weirii
| authority = (Murrill) L.W. Zhou & Y.C. Dai (2016)
| synonyms = {{hidden begin|title = List}}
- Fomitiporia weirii Murrill (1914)
- Poria weirii (Murrill) Murrill (1914)
- Fuscoporia weirii (Murrill) Aoshima (1953)
- Inonotus weirii (Murrill) Kotl. & Pouzar (1970)
- Phellinidium weirii (Murrill) Y.C.Dai (1995)
- Phellinus weirii (Murrill) Gilb. (1974)
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}}
Coniferiporia weirii is a species of fungus. It is a plant pathogen that causes laminated root rot in certain conifers, typically Douglas-fir and western redcedar.{{cite web|title=Laminated root rot |author=Natural Resources Canada |url=http://www.pfc.cfs.nrcan.gc.ca/pathology/rootd/laminated_e.html |access-date=2008-10-04 |url-status=dead |archive-url=https://web.archive.org/web/20060902084947/http://www.pfc.cfs.nrcan.gc.ca/pathology/rootd/laminated_e.html |archive-date=September 2, 2006 }} It is widespread in the Douglas-fir growing regions of British Columbia, Washington and Oregon.{{cite web | title = Forest Pathology: Laminated Root Rot | publisher = Canadian Forest Service | url =http://www.pfc.forestry.ca/pathology/rootd/laminated_e.html | access-date = 2007-07-16 |archive-url = https://web.archive.org/web/20070415081933/http://pfc.forestry.ca/pathology/rootd/laminated_e.html |archive-date = 2007-04-15}}
Description
Coniferiporia 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. Reduced growth rate is an attribute of tree infection.{{cite web |title=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. |url=http://www.fs.fed.us/pnw/pubs/gtr349/gtr349b.pdf |archive-url=https://web.archive.org/web/20121003143935/http://www.fs.fed.us/pnw/pubs/gtr349/gtr349b.pdf |archive-date=2012-10-03 |access-date=2022-03-24 |website=Fs.fed.us |format=PDF}} Particular attention is invited to the growth ring patterns visible in the images below.
Commercial losses
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.{{cite web | title = Laminated Root Rot of Western Conifers | publisher = U.S. Department of Agriculture | url = http://www.fs.fed.us/r6/nr/fid/fidls/fidl159.htm | access-date = 2007-07-16}}
Image:Laminatedroot1.jpg| Moderately advanced infection
Image:Laminatedroot2.jpg| Close up of infection at Apiary, Oregon
File:Phellinus weirii rot.jpg| Hollow log at stump level---An extreme case of infection
File:Phellinus weirii on a log.jpg| View of long butt showing reduced rot a few feet up from the stump
References
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Category:Fungal conifer pathogens and diseases
Category:Fungi described in 1914
Category:Fungi of North America
Category:Taxa named by William Alphonso Murrill
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