blue mold fungus


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Noun1.blue mold fungus - fungus causing a serious disease in tobacco plants characterized by bluish-grey mildew on undersides of leaves
genus Peronospora, Peronospora - genus of destructive downy mildews
downy mildew, false mildew - any of various fungi of the family Peronosporaceae parasitic on e.g. grapes and potatoes and melons
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