Ustulina deusta

Ustulina deusta is a species of fungus in the family Kretzschmariaceae. It is commonly known as the charcoal stump rot or brittle cinder. This fungus is a saprophyte and parasite, primarily found on hardwood trees, especially beech and oak.

Description

The fruiting body of Ustulina deusta is typically black and crust-like, with a brittle texture. The spores are elliptical and smooth, with a size of 16-20 x 7-9 µm. The fungus is known for its ability to cause a white rot in the heartwood of trees, leading to the common name "charcoal stump rot".

Distribution and habitat

Ustulina deusta is widely distributed across the world, found in North America, Europe, and Asia. It prefers temperate climates and is commonly found in deciduous forests. The fungus grows on dead or dying hardwood trees, particularly on the stumps and roots.

Pathogenicity

Ustulina deusta is a pathogen of hardwood trees. It causes a white rot that decays the heartwood, leading to structural weakness and eventual tree death. The fungus enters the tree through wounds or damaged areas, then spreads through the wood, breaking down the lignin and cellulose.

Control and management

Control of Ustulina deusta involves maintaining tree health to prevent infection. This includes proper pruning to avoid wounds and damage. Infected trees should be removed to prevent the spread of the fungus. Chemical control is not typically effective against this fungus.

See also

• List of fungal tree pathogens
• White rot fungi

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