downy mildew


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Related to downy 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 ?
Cucurbit downy mildew (Pseudoperonospora cubensis): Biology, ecology, epidemiology, host-pathogen interaction and control.
Impatiens or Busy Lizzies - these suffered a downturn in popularity due to their propensity for downy mildew. However, breeders have been busy developing mildew-resistant New Guinea varieties to replace the much-loved plants.
These lines were screened for pearl millet downy mildew resistance in Senegal and some of them showed good agronomic traits and resistance to the pearl millet downy mildew.
New and exciting vegetables for 2018 include Citadel Cucumber (a pickling cucumber with intermediate resistance to Downy Mildew), Grandprize Squash (a high-quality yellow straightneck with an enhanced disease package), Secretariat Pumpkin (offering one of the largest handles available), and many more.
(2007) observed drastic reduction of free water on leaves, no establishment of downy mildew, reduction of incidence and severity of bunch rot and increase of residual fungicide captan under cultivation conditions with grapevine cover of Moscato Giallo cultivar.
And while our basil crop thrived for most of the season, by the end of September it became infected with basil downy mildew. Once thought to be more or less extinct, this pathogen popped up in Florida more than a decade ago, and then spread north and now west.
In this work, A K-means Clustering Algorithm based method is proposed to detect the Powdery Mildew and Downy Mildew in grape plants.
Azoxystrobin helps in protecting crops against prevalent fungal diseases including Septoria leaf blotch, rye leafrust (Puccinia triticina), stripe rust, powdery mildew, wheat leaf rust (Puccinia recondita), and downy mildew. The specified concentration of azoxystrobin is 25-400 grams of active ingredient per hectare.
Impatiens, or Busy Lizzies, have suffered from a major downy mildew problem, but breeders have been busy growing more robust varieties - the New Guinea impatiens have greater resistance to mildew and will perk up your pots with vibrant pinks and purples.
Soybean [Glycine max (L.) Merill)] can be attacked by several diseases, among which downy mildew caused by Peronospora manshurica (Naumov) Syd.can cause 8 to 14% damage to U.S.
Biological products company Marrone Bio Innovations (NasdaqGM:MBII) reported on Tuesday that it has submitted a new biological fungicide (MBI-110) to the US Environmental Protection Agency for a new solutions for downy mildew.
Right: Tissue infected with downy mildew has high colonization.