Abstract
In September 2012, alyssum (Lobularia maritima) plants cultivated in a greenhouse in Nagano Prefecture, Japan were observed with yellowing of the adaxial surface of leaves and a white downy growth on the abaxial surface. We identified the causal pathogen as Hyaloperonospora lobulariae based on the morphology and rDNA-ITS sequences. Seedlings of alyssum were inoculated with the pathogen, and the original symptoms were reproduced. This is the first report of downy mildew of alyssum in Japan.
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Acknowledgments
We thank Mr. G. Toyoshima and Mr. H. Takezawa, Nagano Prefectural Government; Dr. M. Fujinaga, Nagano Vegetable and Ornamental Crops Experiment Station; Ms. H. Machida, Nagano Josho Agricultural Extension Center; and Dr. M. Kubota, NARO Institute of Vegetable and Tea Science for their cooperation and support in performing the experiment. And we also thank Mr. T. Ono, Tokyo Metropolitan Agriculture and Forestry Research Center for his valuable information.
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The reported nucleotide sequence data are available from the DDBJ/EMBL/GenBank databases as accessions AB898680.
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Satou, M., Chikuo, Y. & Matsushita, Y. Downy mildew of alyssum caused by Hyaloperonospora lobulariae in Japan. J Gen Plant Pathol 81, 83–86 (2015). https://doi.org/10.1007/s10327-014-0555-x
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DOI: https://doi.org/10.1007/s10327-014-0555-x