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Wood decay caused by Serpula lacrymans (called true dry rot, a type of brown-rot). Fomes fomentarius is a stem decay plant pathogen Dry rot and water damage. A wood-decay or xylophagous fungus is any species of fungus that digests moist wood, causing it to rot.
Heterobasidion annosum moves short distances from the roots of an infected stump through root grafts with other trees. It can also spread through insects that feed on roots. [1] [6] Since this fungus can not move very far through soil, it relies on tree roots to help it infect neighbouring trees. In these roots, it can grow 0.1–2.0 m per year.
The trees die from failure to take up water and nutrients because the main roots are decayed. The death is also accelerated by wind that throws the trees down. It is estimated that Laminated root rot reduces timber production by about 4.4 million cubic meters annually. [4] Wood losses in British Columbia are estimated to be 1.4 million cubic ...
Heart rot fungi, including P. pini, enter trees as mycelium or basidiospores through branch stubs, tree stumps, damaged roots, dead branches, and wounds in general and go on to infect the heartwood of the tree. Fire and cutting operations cause the most common points of entry for the fungus. Moist environments also facilitate fungal growth. [10]
This saprotrophic small gill fungus grows prolifically in large clumps on stumps, dead roots or rotting trunks of broadleaved trees. The "sulphur tuft" is bitter and poisonous; consuming it can cause vomiting, diarrhea and convulsions. The toxins are steroids known as fasciculols and have been shown to be calmodulin inhibitors. [1] [2]
The fungus also performs essential nutrient cycling functions in these forests by decomposing stems, branches, roots, and boles of dead trees. Cavities created by the fungus in standing trees provide crucial habitat for many wildlife species including bears, voles, squirrels, and a number of bird species. The lack of disturbance in these areas ...
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Armillaria tabescens is found to attack trees that are already stressed or have a wound. The pathogen can spread its mycelia and get into the trunk or root of a tree. [9] The fungus has the ability to spread its mycelia throughout the root and trunk system and form mycelial mats.