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http://dx.doi.org/10.5423/RPD.2007.13.1.006

Root and Basal Stem Rot of Moth Orchid (Phalaenopsis spp.), Pung-nan (Neofinetia falcata) and Nadopung-nan (Aerides japonicum) Caused by Fusarium spp.  

Kim, Jin-Won (Department of Environmental Horticulture, The University of Seoul)
Chun, Se-Chul (Department of Molecular Biotechnology, College of Life and Environmental Sciences, Konkuk University)
Publication Information
Research in Plant Disease / v.13, no.1, 2007 , pp. 6-14 More about this Journal
Abstract
Root and basal stem rot disease occurred on moth orchid (Phalaenopsis spp.), Pung-nan (Neofinetia falcata) and Nadopung-nan (Aerides japonicum) grown in the farmers' greenhouses located in Namyangju Kyonggi province, Korea during 2005 to 2006. Wilting symptoms occurred on these orchard plants at initial stage and the infected plant leaves turned yellow to red. The discolored leaves were fallen down to lead to eventual death of the entire plant. A total of 59 isolates of Fusarium spp. was obtained from roots and leaf bases of the diseased plants. The cultural and morphological characteristics of isolated Fusairum spp. were identified as Fusarium oxysporum, F. proliferatum and F. solani. F. oxysporum and F. proliferatum were isolated from all these orchard plants but F. solani was isolated only from Phalaenopsis spp. Pathogenicity of the three Fusarium spp. was confirmed by artificial inoculation. Although F. oxysporum, F. proliferatum and F. solani cusing root rot disease in Phalaenopsis spp. have been reported in Korea, the pathogens in N. falcata and A. japonicum were not reported yet. Therefore, this is the first report on the root and stem rot of N. falcata and A. japonicum caused by F. oxysporum and F. proliferatum in Korea.
Keywords
Fusarium spp.; Moth orchid (Phalaenopsis spp.); Nadopung-nan (Aerides japonicum); Pung-nan (Neofinetia falcata); Root and basal stem rot;
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