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Seedling rot of garland chrysanthemum caused by Gibellulopsis chrysanthemi and ecological characters of the causal fungus |
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| Authors: | Mitsuo Kawaradani Kiyoshi Taguchi Kiyotsugu Okada Yuuri Hirooka Toyozo Sato |
| Affiliation: | 1. Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture, Shakudo 442, Habikino, Osaka, 583-0862, Japan 2. Osaka Prefectural Chuubu Office for Agriculture-Forestry Promotion and Nature Conservation, Shounai-cho 2-1-36, Yao, Osaka, 584-0031, Japan 3. Department of Forest Microbiology, Forestry and Forest Products Research Institute, Matsunosato 1, Tsukuba, Ibaraki, 305-8687, Japan 5. Biodiversity (Mycology and Microbiology), Agriculture and Agri-Food Canada, Ottawa, Canada 4. Biological Resources Center, National Institute of Agrobiological Sciences, Kannondai 2-1-2, Tsukuba, Ibaraki, 305-8602, Japan |
| Abstract: | A new disease found on garland chrysanthemum in Osaka, Japan in 2009 and its causal agent were identified and characterized. Light brown spots first appeared on lower leaves of seedlings, and the leaves blighted or rotted. A fungus isolated from diseased plants, described recently as Gibellulopsis chrysanthemi, was demonstrated to reproduce the natural symptoms in inoculation tests. Sufficiently long, moist periods after inoculation promoted the infection even after lengthy dry periods. The pathogen also caused the disease on chrysanthemum and lettuce, but not on seven other vegetables. The fungus caused the disease after 6 months of dry storage. The disease was termed seedling rot (“nae-fuhai-byo” in Japanese). |
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