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Impatiens downy mildew: Gardeners need to know

April 17, 2013
By Richard Gast , Franklin County Cornell Cooperative Extension

In recent weeks, several alerts focusing on impatiens downy mildew (Plasmopara obducens), an oomycete, or water mold disease, which is related to the pathogen commonly referred to as late blight of tomatoes and potatoes, have been circulating among Extension educators across the northeast. Fortunately, impatiens downy mildew strikes garden impatiens, (Impatiens walleriana) and little else.



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