Downy mildew of busy lizzie caused by Plasmopara obducens in Japan
Satou, M. (NARO Institute of Floricultural Science, Tsukuba (Japan)) | Sugawara, K. | Nagashima, S. | Tsukamoto, T. | Matsushita, Y.
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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