| Sclerotium rolfsii에 의한 비비추 흰비단병 |
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권진혁, 박창석 |
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| Stem Rot of Hosta Longipes Caused by Sclerotium rolfsii in Korea |
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Jin Hyeuk Kwon, Chang Seuk Park |
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| Abstract |
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The stem rot disease was found on Hosta longipes that planted in the flower beds along the Namgang riverside in Jinju city, Korea. The disease occurred first time in July, 2004 and sporadically occurred in 2005. The typical symptom of the disease is water-soaking, dark brown spot on the stem, and getting wilt. The infected plants were mostly died. White mycelial mats were spread over lesions and sclerotia were formed on stems and near soil line. The sclerotia were globoid in shape, 1~3 mm in diameter and white to brown in color. The optimum temperature for mycelial growth of the fungus on PDA was 30℃ and the hyphal width was 4~8 μm. Clamp connections were observed in the hyphae of the fungus grown on PDA. Pathogenicity of the causal organism was proved on Hosta longipes according to Koch,s postulate. On the basis of mycological characteristics and pathogenicity to host plants, the fungus was identified as Sclerotium rolfsii Saccardo. This is the first report on the stem rot of H. longipes caused by S. rolfsii in Korea. |
| Key Words:
Hosta Longipes, Sclerotium rolfsii, Stem rot |
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