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Annosum root rot

Heterobasidion annosum

A species of Heterobasidion, Also known as Root rot

Annosum root rot is a bracket fungus that causes a disease named after its species name, annosum. The fungus is one of the most serious parasites that grow on conifers, though it sometimes affects deciduous trees as well. It causes serious damage to the forest ecosystems and forest industry.

Cap Diameter
Cap Diameter:

20 - 30 cm

Odor
Odor:

Mild, sweet, with a faint floral hint.

General Info About Annosum root rot
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Attributes of Annosum root rot
Cap Diameter
20 - 30 cm
Cap
grayish to reddish brown zones
Cap Surfaces
Velvety
Stem
Absent
Flesh
Whitish cream and leathery, with a strong, sweetish, fungal smell
Spore Print Color
White
Odor
Mild, sweet, with a faint floral hint.
Body Color
Brown
Black
Red
White
Flesh Bruises
The flesh or milk does not discolor when bruised or cut.
Growth Form
Solitary, Gregarious
Nutrient Gathering
Saprophytic, Parasitic
Substrate
Wood of Living Trees, Dead Woods
You can find Annosum root rot by these plants:
Spruces, Pines, Firs
Occurence Habitats
Coniferous Woodland
Species Status
Appearing year-round
Endangered Species
No
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Habitat of Annosum root rot
Annosum root rot thrives in woody environments, typically found as a parasite on conifer wood or living as a saprobe on deadwood, nestled at tree bases.
Distribution Area of Annosum root rot
North America,Europe,northern Asia
Scientific Classification of Annosum root rot
Similar Species to Annosum root rot
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Tips for Finding Annosum root rot
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What are Some Tips for Finding Annosum root rot
  • Inspect the bases of conifer trees, focusing especially on dead or weakened specimens for signs of annosum root rot.
  • Look for annosum root rot near stumps or roots of conifers, as they are often associated with decaying wood material.
  • Since annosum root rot may reappear annually, revisit known infected trees or areas which previously had annosum root rot present.
  • While rare on hardwoods, don't neglect to check the bases of weakened hardwoods, especially beech trees.
How to Clean and Preserve Annosum root rot
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Common Questions People Also Ask
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