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KMID : 0379120200480040519
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Korean Journal of Mycology
2020 Volume.48 No. 4 p.519 ~ p.521
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Damping-off of Indian Lettuce Caused by Rhizoctonia solani AG-4
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Moon Youn-Gi
Kim Se-Won
Seo Hyun-Taek
Kim Wan-Gyu
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Abstract
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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.
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KEYWORD
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Anastomosis, Damping-off, Indian lettuce, Pathogenicity, Rhizoctonia solani AG-4
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