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Downy mildew of busy lizzie caused by Plasmopara obducens in Japan |
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| Authors: | Mamoru Satou Kei Sugawara Susumu Nagashima Toshihide Tsukamoto Yosuke Matsushita |
| Institution: | 1. NARO Institute of Floricultural Science, 2-1 Fujimoto, Tsukuba, 305-8519, Japan 2. Agricultural Technique Improvement Research Office, Shonai Area General Branch Administration, Yamagata Prefectural Government, Sakata, Yamagata, 998-0112, Japan 3. Shimane Agricultural Technology Center, Izumo, Shimane, 693-0035, Japan |
| Abstract: | In June 2010 and March 2012, busy lizzie (Impatiens sultanii) plants in a glasshouse in Yamagata Prefecture and in nurseries in a plastic house in Shimane Prefecture, Japan were observed with yellowing of the adaxial surface of leaves or cotyledons and a white downy growth on the abaxial surface of leaves or cotyledons. We identified the causal pathogen as Plasmopara obducens based on the morphologies and rDNA-large subunit sequences. This new disease was named “downy mildew of busy lizzie” in Japan. |
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