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KMID : 0379120010290020131
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Korean Journal of Mycology
2001 Volume.29 No. 2 p.131 ~ p.133
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Collar Rot of Broad Bean (Vicia faba) Caused by Sclerotium rolfsii
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Park Chang-Suk
Kim Tae-Sung
Kang Soo-Woong
Kwon Jin-Hyeuk
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Abstract
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A destructive collar rot disease was found on broad bean (Vicia faba) in several farmer´s field located in Changseon-myon, Namhae-gun, Gyeongsangnam-do in 2001. The typical symptoms of the disease were stem rot, crown rot, wilt or blight. Upper parts of the infected stems were mostly blighted and white mycelial mats were spread over lesions and the sclerotic were formed on the stems near soil line. The infection rates of the disease in the surveyed area were ranged from 28.6 to 42.8%. The sclerotic of the fungus readily formed in artificial media such as PDA at 30℃ and its shape was globoid or irregular and size was 1.0∼3.7×1.0∼2.8㎜ (av 1.0∼2.3 ㎜) and was brown or dark brown in color. The optimum temperature for growth of the fungus was about 30℃. The typical clamp connections were found in the hypha of the fungus grown on PDA. On the basis of mycological characteristics and pathogenecity test on host plants, the fungus was identified as Sclerotium rolfsii. This is the first report on the collar rot of broad bean caused by Sclerotium rolfsii in Korea.
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