downy mildew

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Related to Downey mildew: powdery mildew, damping off

downy mildew

n.
1. Any of various plant diseases caused by oomycetes and characterized by whitish gray patches of spores on the lower surfaces of leaves.
2. An oomycete causing such a disease.

downy mildew

n
1. (Plant Pathology) a serious plant disease, characterized by yellowish patches on the undersurface of the leaves, caused by the parasitic fungi of the family Peronosporaceae, such as Peronospora destructor: affects onions, cauliflower, lettuce, etc
2. (Plant Pathology) any of the fungi causing this disease

down′y mil′dew


n.
1. any common fungus of the family Peronosporaceae, appearing on damp vegetable or animal matter as a white fuzzy mass of spores.
2. a disease of plants caused by growth of downy mildew on the undersurface of the leaves, characterized by crumpling, yellowing, and death of the foliage.
[1885–90]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.downy mildew - any of various fungi of the family Peronosporaceae parasitic on e.g. grapes and potatoes and melons
family Peronosporaceae, Peronosporaceae - parasitic fungi: downy mildews
blue mold fungus, Peronospora tabacina - fungus causing a serious disease in tobacco plants characterized by bluish-grey mildew on undersides of leaves
onion mildew, Peronospora destructor - fungus causing a downy mildew on onions
Peronospora hyoscyami, tobacco mildew - fungus causing a downy mildew on growing tobacco
mildew - a fungus that produces a superficial (usually white) growth on organic matter
References in periodicals archive ?
Similarly, the bajra crop in various parts of the country was facing Downey Mildew pest attacks during the blossoming stage.
Note that the New Guinea Impatiens now widely grown and resistant to impatiens Downey mildew were discovered within the last century in Java.
A Sounds like downey mildew, a newlydiscovered disease which causes the leaves to fall.