sp. nov., A Novel Helminthosporoid Species Causing Foliage Blight of the Garden Plant in Brazil.

A severe leaf spot, turning to foliage blight, was observed on leaves of growing in a garden in Brazil (state of Rio de Janeiro) in 2015. A dematiaceous hyphomycete bearing a morphology typical of a helminthosporoid fungi was regularly found in association with diseased tissues. The fungus was isolated and pathogenicity was demonstrated through the completion of Koch's postulates.