Coniferiporia weirii
| Coniferiporia weirii | |
|---|---|
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| Fruit bodies of Phellinus weirii | |
| Scientific classification | |
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| Species: | P. weirii
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| Binomial name | |
| Phellinus weirii | |
| Synonyms[1] | |
Phellinus weirii is a plant pathogen causing 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]
Overview
Symptoms of fungal infection are readily recognized when timber is cut because a brown stain will appear on the butt cut. In early stages it will be just a spot in the heart wood, but as the disease advances it will extend most of the way around the heart wood, and in extreme cases may result in a hollow stump. Usually it is not observed more than a few feet above ground level.
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.
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Moderately advanced infection -
Close up of Phellinus weirii infection at Apiary, Oregon -
Hollow log at stump level---An extreme case of infection -
View of long butt showing reduced rot a few feet up from the stump
References
- ^ "GSD Species Synonymy: Phellinus weirii (Murrill) Gilb". Species Fungorum. Kew Mycology. Retrieved 2017-01-23.
- ^ Natural Resources Canada. "Laminated root rot". Archived from the original on September 2, 2006. Retrieved 2008-10-04.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ "Forest Pathology: Laminated Root Rot". Canadian Forest Service. Archived from the original on 2007-04-15. Retrieved 2007-07-16.
- ^ "Laminated Root Rot of Western Conifers". U.S. Department of Agriculture. Retrieved 2007-07-16.
- ^ http://www.fs.fed.us/pnw/pubs/gtr349/gtr349b.pdf
External links
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