Korean Journal of Mycology (Kor. J. Mycol.)
Youn-Gi Moon 1, Se-Won Kim 1, Hyun-Taek Seo 1, and Wan-Gyu Kim 2*
1Wild Vegetable Research Institute, Gangwondo Agricultural Research and Extension Services,
Pyeongchang 25300, Korea
2Global Agro-Consulting Corporation, Hwaseong 18330, Korea
Correspondence to wgkim5121@naver.com
Korean Journal of Mycology (Kor J Mycol) December, 2020, 48(4):519-521.
https://doi.org/10.4489/KJM.20200051
Accepted: December 08, 2020; Revised: November 17, 2020; Received: November 17, 2020
Published: December, 2020.
© 2020 THE KOREAN SOCIETY OF MYCOLOGY.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Damping-off symptoms were frequently observed on young plants of Indian lettuce (Lactuca indica) grown in a farmer's vinyl greenhouse located in Goseong, Gangwon province of Korea during a disease survey in June 2019. The incidence of diseased plants in the vinyl greenhouse investigated was 30-50%. Four isolates of Rhizoctonia sp. were obtained from the diseased plants and identified as Rhizoctonia solani AG-4 based on the morphological characteristics and anastomosis test. Three isolates of R. solani AG-4 were tested for pathogenicity on Indian lettuce by artificial inoculation. All the tested isolates induced damping-off symptoms on the inoculated plants. The symptoms were similar to those observed in plants from the farmer's vinyl greenhouse investigated. This is the first report of R. solani AG-4 causing damping-off in Indian lettuce.
Anastomosis, Damping-off, Indian lettuce, Pathogenicity, Rhizoctonia solani AG-4