Monilinia ssiori sp. nov. in the Sclerotiniaceae, causing leaf blight and young fruit rot of Prunus ssiori in Japan

The leaf blight and mummy fruit disease fungus of Prunus ssiori in northern Japan is newly named M. ssiori, as a fourth member in the M. padi group of section Disjunctoriae of the genus Monilinia (Sclerotiniaceae). It has been misidentified with Monilinia kusanoi, but recent studies show it is different from M. kusanoi as well as other related species on prunaceous hosts in respect to host relation, pathogenicity, morphology, and gene analysis.