First Report of Curvularia pseudobrachyspora Causing Leaf Blight on Nageia fleuryi
2025
Peiwen Yang | Lele Mu | Yuyang Lan | Bin Lin | Wangdong Xu | Yunqing Liang | Zihui Huang | Guanghong Liang | Qinghua Zhang
A severe leaf blight disease was observed on Nageia fleuryi in Fuzhou, China, during 2022&ndash:2023, causing necrosis on more than 60% of young leaves in both urban and plantation trees. This study aimed to identify the causal agent of the disease. The pathogen was consistently isolated from symptomatic tissues, and pathogenicity tests confirmed its ability to reproduce the disease on detached leaves, fulfilling Koch&rsquo:s postulates. The representative isolate ZB-2 produced gray, cottony colonies and curved, 3-septate conidia with a swollen third cell, morphologically resembling Curvularia pseudobrachyspora. Multilocus phylogenetic analyses based on ITS, GAPDH, and Tef1-&alpha: sequences placed ZB-2 firmly within the C. pseudobrachyspora clade, confirming its identity. This study constitutes the first global record of C. pseudobrachyspora as a pathogen of leaf blight on N. fleuryi.
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