peronospora : Idioms & Phrases
genus peronospora
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noun genus of destructive downy mildews
Peronospora.
WordNet
peronospora destructor
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noun fungus causing a downy mildew on onions
onion mildew.
WordNet
peronospora hyoscyami
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noun fungus causing a downy mildew on growing tobacco
tobacco mildew.
WordNet
peronospora tabacina
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noun fungus causing a serious disease in tobacco plants characterized by bluish-grey mildew on undersides of leaves
blue mold fungus.