Valsa_sordida
Valsa sordida
Species of fungus
Valsa sordida is a species of fungus within the family Valsaceae. A plant pathogen, it causes dieback of small branches and twigs of broad-leaved trees, usually poplar. It is found in Africa, Australasia, Europe, and North and South America. The anamorph is Cytospora chrysosperma.[4]