Evaluation and Control of Fusarium acuminatum Causing Leaf Spot in Saposhnikovia divaricata in Northeast China

文献类型： 外文期刊

第一作者： Jiang, Yanyan

作者： Jiang, Yanyan;Wang, Shuni;Li, Yonggang;Zhang, Lili;Bai, Yunlong;Cao, Liping

作者机构：

关键词： fungicide efficacy; host range; identification; leaf spot; Saposhnikovia divaricata

期刊名称：PLANT DISEASE （ 影响因子：4.5； 五年影响因子：5.0 ）

ISSN： 0191-2917

年卷期： 2024 年 108 卷 5 期

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收录情况： SCI

摘要： Saposhnikovia divaricata is an authentic Chinese herbal medicine in Northeast China named Guanfangfeng, which is made from very high-quality plants for sufficient efficacy. However, leaf spot causes a very large reduction in the yield and quality of S. divaricata in Shuangyashan (46.58 degrees N, 131.28 degrees E), Northeast China. A total of 18 isolates were isolated from the diseased leaves of S. divaricata, following Koch's postulates, and identified as Fusarium acuminatum based on morphological, molecular biological, and phylogenetic tree analyses. To the authors' knowledge, this is the first report of F. acuminatum causing S. divaricata leaf spot in China. F. acuminatum infected perilla and mung beans but not foxtail millet, peanuts, wheat, peas, rye, red beans, or sorghum. Susceptibility assessment of F. acuminatum to fungicides using the mycelial growth rate method showed that isolates of F. acuminatum were most sensitive to prochloraz, with effective concentration values of 0.0005413 to 0.0009523 mu g/ml. In the two field experiments, the average control efficacy of prochloraz at 0.450 g/liter on S. divaricata leaf spot caused by F. acuminatum was 75.42%. Therefore, nonhost plant rotation or intercropping with suitable chemical fungicides may be used to control S. divaricata leaf spot. This study's results provide a theoretical basis for controlling S. divaricata leaf spot and will facilitate the development of effective disease management programs.

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