Stem Rot of Gondre Caused by Rhizoctonia solani AG-2-2(IV)

Stem rot symptoms were observed in Gondre (Cirsium setidens) plants growing in a vinyl greenhouse in Taebaek, Korea during a disease survey in June 2022. The plants presented with dark brown to black rot on the stems at or above the soil line. Severely diseased plants displayed wilt and blight. Dise...

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Bibliographic Details
Published inHangug gynnhaghoi ji Vol. 51; no. 2; pp. 141 - 146
Main Authors Wan-Gyu Kim, Gyo-Bin Lee, Hong-Sik Shim, Weon-Dae Cho
Format Journal Article
LanguageEnglish
Published The Korean Society of Mycology 01.07.2023
한국균학회
Subjects
anastomosis
cirsium setidens
gondre
rhizoctonia solani ag-2-2(iv)
stem rot
생물학
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Summary:Stem rot symptoms were observed in Gondre (Cirsium setidens) plants growing in a vinyl greenhouse in Taebaek, Korea during a disease survey in June 2022. The plants presented with dark brown to black rot on the stems at or above the soil line. Severely diseased plants displayed wilt and blight. Disease incidence among these plants ranged from 1 to 5%. Three isolates of Rhizoctonia sp. were obtained from the stem lesions of diseased plants. All isolates were identified as Rhizoctonia solani AG-2-2(IV) based on the morphological and cultural characteristics, results of the anastomosis test, and phylogenetic analysis. The pathogenicity of the isolates to Gondre plants was confirmed using an artificial inoculation test. The lesions induced by the inoculation test were similar to those observed in the investigated vinyl greenhouse. Here, we report a case of R. solani AG-2-2(IV) causing stem rot in Gondre.
Bibliography:https://doi.org/10.4489/KJM.20230016
ISSN:0253-651X
2383-5249
DOI:10.4489/KJM.20230016