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Kretzschmaria deusta
Carbon cushion
Description
In spring, the fruiting bodies (stromata) are flat, crusty, round or elliptic, with a white edge and grey-green centrein which conidia are formed. In summer the fruiting body transforms into a black lumpy structure of a brittle charcoal-like consistency. In its surface, bottle-shaped perithecia are sunk, containing a gelatinous mass with asci and ascospores. Above the decayed area the affected trunk or thick branches develop false heartwood of noticeable red-brown discolouration. As a result of advanced decay, the tree trunks often break in roots or at the trunk base. The older name of the fungus is Ustulina deusta.
Symptom
A dry black formation on a trunk similar to charcoal.
Tree Species: Elm, Beech, Maple, Lime, Horse Chestnut
Part of a plant- attacked: Tree trunk
Pest significance: Very harmful
Pest Category: Fungi
Invasive Species: No
Present in EU: Yes
Add comment: Kretzschmaria deusta
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Last observations
There are a total of 4 observations of the species in the system
Kretzschmaria deusta Carbon cushion
Anna Fojtikova
Number of votes: 0
Published: 7.12.2025
Kretzschmaria deusta Carbon cushion
mo
Number of votes: 0
Published: 14.2.2025
Kretzschmaria deusta Carbon cushion
ak73
Number of votes: 0
Published: 11.7.2022
Kretzschmaria deusta Carbon cushion
ak73
Number of votes: 0
Published: 11.7.2022
Kretzschmaria deusta Carbon cushion
ak73
Number of votes: 0
Published: 11.7.2022
Similar damage
Root and crown rot
Horse-chestnut scale
Beech bark disease
