Three new species of (Apiosporaceae, Amphisphaeriales) associated with diseased bamboo in China.

is widely distributed worldwide, primarily comprising pathogens, endophytes, and saprobes associated with plants, and most of its hosts are Poaceae. In this study, 37 pathogenic strains of were isolated from diseased bamboo collected in the provinces of Hunan and Guizhou, China. Multilocus phylogenetic analysis using combined ITS, LSU, , and sequence data, along with morphological assessments, identified three new species: , , and Descriptions, illustrations, and phylogenetic trees for the newly discovered species are provided and compared with closely related species to enhance our understanding of the genus . The pathogenicity test results demonstrated that the three new species could cause bamboo culm diseases, providing valuable information for the diagnosis and management of bamboo culm diseases.