Identification and Fungicide Sensitivity of Fusarium spp. Associated with Root Rot of Scutellaria baicalensis in Shanxi Province, China

Fusarium root rot is usually classified as an extremely destructive soilborne disease. From 2020 to 2021, Fusarium root rot was observed in production areas and seriously affected the yield and quality of in Shanxi Province, China. Based on morphological characteristics and combined analysis of the internal transcribed spacer region of ribosomal DNA and translation elongation factor 1-alpha sequences, 68 isolates obtained in this work were identified as (52.94%), (20.59%), (16.17%), (5.88%), (2.94%), and (1.47%). In the pathogenicity tests, all isolates could infect roots, presenting different pathogenic ability. Among these isolates, was found to have the highest virulence on roots, followed by , and . According to fungicide sensitivity tests, isolates were more sensitive to fludioxonil and difenoconazole, followed by carbendazim, thiophanate-methyl, and hymexazol. In brief, this is the first report of species ( , and ) as causal agents of root rot of in Shanxi Province, China. The fungicide sensitivity results will be helpful for formulating management strategies of root rot.