Geschnäbelter Ahorn-Kugelpilz

Gnomonia cerastis is an ascomycete fungus in the family Gnomoniaceae that causes cherry leaf scorch and leaf spot disease on cherry and plum trees (Prunus species). It overwinters in infected fallen leaves, releasing ascospores in spring that infect newly emerging foliage. As a plant pathogen, it can cause defoliation and weaken trees, particularly in orchard settings under humid conditions.