Brittle cinder fungus (Kretzschmaria deusta) on a tree stump in Smolenskoe Cemetery of Vasilievsliy Island. Saint Petersburg, Russia, June 26, 2017
Zheleznovodskaya ul., 18, Sankt-Peterburg, Russia, 199155Synonyms: Discosphaera deusta, Hypoxylon deustum, Hypoxylon magnosporum, Hypoxylon ustulatum, Nemania deusta, Nemania maxima, Sphaeria albodeusta, Sphaeria deusta, Sphaeria maxima, Sphaeria versipellis, Stromatosphaeria deusta, Ustulina deusta, Ustulina maxima, Ustulina vulgaris.
Common name: brittle cinder.
Russian name: Ustulina obyknovennaya.
Extract from Wikipedia article: Kretzschmaria deusta, commonly known as brittle cinder, is a fungus and plant pathogen found in temperate regions of the Northern Hemisphere. It is common on a wide range of broadleaved trees including beech (Fagus), oak (Quercus), lime (Tilia), Horse Chestnut and maple (Acer). It also causes serious damage in the base of rubber, tea, coffee and palms. It causes a soft rot, initially and preferentially degrading cellulose and ultimately breaking down both cellulose and lignin, and colonises the lower stem and/or roots of living trees through injuries or by root contact with infected trees. It can result in sudden breakage in otherwise apparently healthy trees. The fungus continues to decay wood after the host tree has died, making K. deusta a facultative parasite. The resulting brittle fracture can exhibit a ceramic-like fracture surface. Black zone lines can often be seen in cross-sections of wood infected with K. deusta.
Kretzschmaria deusta is a fungus that causes soft rot in trees, particularly on deciduous species. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found to infect various tree species, including birch, aspen, and willow. The fungus grows on dead wood, stumps, and living trees, often forming large, black, crust-like colonies on the bark. It is commonly associated with moist, humid environments and can be found in urban parks, forests, and along waterways.
Brittle cinder fungus (Kretzschmaria deusta) on a tree stump in Smolenskoe Cemetery of Vasilievsliy Island. Saint Petersburg, Russia, June 26, 2017Zheleznovodskaya ul., 18, Sankt-Peterburg, Russia, 199155
Brittle cinder fungus (Kretzschmaria deusta) on an old stump in Smolenskoe Cemetery of Vasilievsliy Island. Saint Petersburg, Russia, June 26, 2017Zheleznovodskaya ul., 18, Sankt-Peterburg, Russia, 199155
Brittle cinder fungus (Kretzschmaria deusta) on a stump under spruce trees in Catherine Park. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, May 23, 2019Marble Bridge, Podkaprizovaya Doroga, Pushkin, Sankt-Peterburg, Russia, 196603
Close up of brittle cinder fungus (Kretzschmaria deusta) on a stump under spruce trees in Catherine Park. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, May 23, 2019Marble Bridge, Podkaprizovaya Doroga, Pushkin, Sankt-Peterburg, Russia, 196603Observations of Kretzschmaria deusta in Leningrad Oblast and north-western Russia reveal the fungus grows on tree stumps in various locations. In Smolenskoe Cemetery on Vasilievsliy Island, Saint Petersburg, it was found on a tree stump and an old stump on June 26, 2017. Similarly, in Catherine Park, Pushkin, near Saint Petersburg, the fungus was observed on a stump under spruce trees on May 23, 2019. A close-up view of the fungus on the same stump in Catherine Park showed its characteristics in detail. These observations indicate that Kretzschmaria deusta thrives in wooded areas with decaying wood, such as tree stumps, in the region. The fungus appears to be common in urban and park environments, suggesting it can tolerate a range of conditions and is widely distributed in Leningrad Oblast and north-western Russia.
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