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Overwintering of brown leaf spot fungus, Mycochaetophora gentianae, in infected gentian leaves as the primary inoculum source |
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| Authors: | Syuuichi Nekoduka Kazuaki Tanaka Teruo Sano |
| Institution: | 1. Iwate Agricultural Research Center, 20-1 Narita, Kitakami, Iwate, 024-0003, Japan 2. The United Graduate School of Agricultural Sciences, Iwate University, 18-8, Ueda 3 chome, Morioka, 020-8550, Japan 3. Department of Agriculture, Forestry and Fishery, Iwate Prefecture, 10-1 Uchimaru, Morioka, Iwate, 020-8570, Japan 4. Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, Aomori, 036-8561, Japan |
| Abstract: | Overwintering of the brown leaf spot fungus, Mycochaetophora gentianae, in infected gentian leaves was studied in Iwate, northern Japan. Sporophores were produced on overwintered, infected leaves when they were sampled from January to July, but not in August after incubation in high humidity at 15 °C. Symptoms developed on gentian plants grown in soil artificially infested with overwintered, infected leaves that were either left throughout the experiments or removed before planting. Few lesions developed when plants were grown in soil infested with conidia. These results indicate that M. gentianae can overwinter in infected leaves, which act as the primary inoculum source. |
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