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Management of Downy Mildew on Roses


Management of Downy Mildew on Roses


Potted roses grown in U.S. greenhouses and nursery production facilities have been plagued since the 1800s by downy mildew, a highly destructive disease. It may occur sporadically in some areas of the country, but is a predictable pest in others. Peronospora sparsa, the pathogen that infects rose (Fig. 1A), is specialized and does not infect other ornamentals.

Source: • American Floral Endowment Special Research Reports #131

Libraries: Floriculture

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