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Bletilla striata (Thunb.) Rchb. f. (Orchidaceae) is a traditional Chinese medicinal plant. In April 2018 and 2019, a leaf spot disease was observed on ∼20% of B. striata plants in two fields (∼1.4 h) in Guilin, Guangxi Province, China (Fig.1 A). Small, circular, brown spots were initially observed on the leaf surfaces, which progressively expanded into large, sunken, dark brown, necrotic areas. As the disease progressed, lesions merged into large, irregular spots, ultimately resulting in abscission. To determine the causal agent, small
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