Leaf-blight disease caused by the is an emerging problem in production in China. Symptoms of leaf blight were observed on seedlings of cultivated in a nursery in Ruili City, Yunnan Province, China. In this study, we isolated the sp. associated with leaf-blight disease of from the diseased seedlings. A pathogenicity test was performed to fulfill Koch's postulates to confirm the pathogenicity of isolated strains and identified using morphological and molecular techniques. The results revealed that all four isolated sp. isolates (DHRL-01~04) produced typical blight symptoms followed by marginal necrosis of leaves on the plants. On the PDA medium, the fungal colony appeared as a white to purplish color with cottony mycelium growth. Microconidia are oval-shaped, whereas macroconidia are sickle-shaped, tapering at both ends with 2-4 septations. The phylogenetic trees were construed based on internal transcribed spacer (), translation elongation factor (), and RNA polymerase subunit genes and genes, respectively, and blasted against the NCBI database for species confirmation. Based on the NCBI database's blast results, the isolates showed that more than 99% identify with . To our knowledge, this is the first comprehensive report on the identification of as the causal agent of leaf blight in Yunnan Province, China, based on morphological and molecular characteristics.