Nettle rash fungus (Leptosphaeria acuta) on a last year dry stalk of nettle taken from Sosnovka Park. Saint Petersburg, Russia, May 8, 2021Synonyms: Ampullina acuta, Ampullina coniformis, Aposphaeria acuta, Cryptosphaeria acuta, Heptameria acuta, Leptophoma acuta, Leptophoma urticae, Leptosphaeria coniformis, Phoma acuta, Phoma urticae, Plenodomus acutus, Pleospora acuta, Sphaeria acuta, Sphaeria coniformis.
Common name: nettle rash.
Russian name: Leptosferiya ostraya.
Extract from Wikipedia article: Leptosphaeria acuta (also known as nettle rash) is a plant pathogen found on the dead stems of common nettle (Urtica dioica).
Leptosphaeria acuta is a species of fungus that belongs to the family Leptosphaeriaceae. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found on various substrates, including plant debris and tree bark. The fungus produces dark brown to black perithecia with a subglobose to globose shape, and its asci contain 8-spored, hyaline ascospores that are typically 40-60 μm long and 5-7 μm wide. It is a relatively common species in the region, often associated with moist environments and decaying organic matter.
Nettle rash fungus (Leptosphaeria acuta) on a last year dry stalk of nettle taken from Sosnovka Park. Saint Petersburg, Russia, May 8, 2021
Tiny black dots of nettle rash fungus (Leptosphaeria acuta) on a last year stalk of nettle (Urtica) taken from Sosnovka Park. Saint Petersburg, Russia, May 8, 2021Observations in Leningrad Oblast and north-western Russia reveal the presence of Leptosphaeria acuta, also known as nettle rash fungus, on dry stalks of nettle (Urtica). In Sosnovka Park, Saint Petersburg, the fungus was found on last year's dry stalks of nettle, specifically on May 8, 2021. The fungus appears as tiny black dots on the stalks, indicating its growth and development. These observations suggest that Leptosphaeria acuta is active in the region, likely infecting nettle plants during their growth cycle. The presence of the fungus on dry stalks from the previous year implies that it can persist and survive winter conditions, potentially reinfecting new plant growth in the following season. Further study could provide insight into the ecological role of Leptosphaeria acuta in this region. The fungus's impact on nettle populations and potential effects on local ecosystems remain to be explored.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
This web page was generated by a special script.