Abstract
Peduncle blight and leaf spot on smoke tree (Cotinus coggygria) and water-soaked lesions on stock (Matthiola incana) petal were observed in Yamagata Prefecture from 2005 to 2007. The causal fungus of these diseases was identified as Colletotrichum acutatum on the basis of morphological characteristics and rDNA-ITS sequence homology. This report adds C. acutatum as new pathogen of smoke tree anthracnose. Petal anthracnose was coined for the disease on stock because the symptoms were different from the anthracnoses reported previously.
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