In 1992, diseased flowers of cosmos (Cosmos bipinnatus) were found in Kanagawa Prefecture, Japan. Small water-soaked lesions occurred first on flowers and flower buds. These lesions then enlarged and turned light brown. Diseased flowers and flower buds eventually fell off. The fungus produced fusiform conidia on the PDA medium, 11-14×2.8-3.5μm in size. From those results, the fungus was identified as Colletotrichum acutatum Simmonds ex Simmonds. It has been newly added as a pathogen causing anthracnose on cosmos.
