Damping-off of Edible Aster Caused by Rhizoctonia solani AG-4

In August 2021, we surveyed diseases of wild vegetables grown in Taebaek, Gangwon Province, Korea. During the disease survey, observed severe damping-off symptoms young edible aster (<i>Aster scaber</i>) plants a vinyl greenhouse investigated. The incidence ranged from 5% to 20%. Diseased were collected greenhouse, and fungi isolated petiole lesions diseased plants. <i>Rhizoctonia</i> sp. was consistently lesions. We examined morphological characteristics anastomosis groups nine isolates obtained examination results revealed that all corresponded <i>Rhizoctonia solani</i> AG-4 based on test. Three <i>R. tested for their pathogenicity by artificial inoculation. Inoculation tests showed caused inoculated induced similar those Damping-off is first reported this study.