Prostrate form of white-rot fungus Heterobasidion parviporum on underside of a big fallen spruce in area of Blizhnie Dubki near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017
Polyanskaya dor., g. Sankt-Peterburg, Russia, 197755Common name: Heterobasidion root rot.
Russian name: Geterobazidion melkoporovyy.
Heterobasidion parviporum is a species of fungus that causes root and butt rot in coniferous trees. In St. Petersburg, Leningrad Oblast, and north-western Russia, it has been found to infect Scots pine, Norway spruce, and other conifer species. The fungus is commonly associated with fresh wounds and stumps, and can spread through spore dispersal and root contact. It is considered a significant pathogen in the region's forestry ecosystems, contributing to tree mortality and decay.
Prostrate form of white-rot fungus Heterobasidion parviporum on underside of a big fallen spruce in area of Blizhnie Dubki near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017Polyanskaya dor., g. Sankt-Peterburg, Russia, 197755
Corticioid form of white-rot fungus Heterobasidion parviporum on underside of a big fallen spruce in area of Blizhnie Dubki near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017Polyanskaya dor., g. Sankt-Peterburg, Russia, 197755
Crust of white-rot fungus Heterobasidion parviporum on underside of a big fallen spruce in area of Blizhnie Dubki near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017Polyanskaya dor., g. Sankt-Peterburg, Russia, 197755
White-rot fungus Heterobasidion parviporum at the base of a spruce stump near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017Polyanskaya dor., g. Sankt-Peterburg, Russia, 197755
White-rot fungus Heterobasidion parviporum taken from a spruce stump near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017
Close up of white-rot fungus Heterobasidion parviporum taken from a spruce stump near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017
Cap of white-rot fungus Heterobasidion parviporum taken from a spruce stump near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017
Pores of white-rot fungus Heterobasidion parviporum taken from underside of a big fallen spruce in area of Blizhnie Dubki near Lisiy Nos, west from Saint Petersburg. Russia, April 7, 2017
Heterobasidion parviporum mushroom in area of Posiolok near Vyritsa, south from Saint Petersburg, Russia, May 1, 2017Unnamed Road, Vyritsa, Leningradskaya oblast', Russia, 188381
Heterobasidion parviporum(?) tinder mushroom on a spruce stump in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 10, 2017alleya Chyornoy Shlyapy, Pavlovsk, Sankt-Peterburg, Russia
White-rot fungus Heterobasidion parviporum on a spruce log near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Close up of white-rot fungus Heterobasidion parviporum on a spruce log near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Texture of white-rot fungus Heterobasidion parviporum on a spruce log near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755
Spreading white-rot fungus Heterobasidion parviporum on a spruce log near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019Primorskoye Shosse, Sankt-Peterburg, Russia, 197755In Leningrad Oblast and north-western Russia, the fungus Heterobasidion parviporum was observed in various forms, including prostrate, corticioid, and crust-like growths on fallen spruce trees and stumps. The fungus was found on the underside of big fallen spruces, at the base of spruce stumps, and on spruce logs. Observations were made in areas such as Blizhnie Dubki near Lisiy Nos, Posiolok near Vyritsa, and Pavlovsk Park, with multiple sightings between April 2017 and May 2019. The fungus displayed distinct features, including pores and a cap, and was seen spreading on spruce logs. Close-up observations revealed the texture of the fungus, providing further insight into its characteristics in this region. Overall, Heterobasidion parviporum appears to be present in various locations throughout Leningrad Oblast and north-western Russia, infecting spruce trees and stumps.
Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.
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