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- Dictionarydowny mildew
noun
- 1. mildew on a plant which is marked by a whitish down composed of spore-forming hyphae, penetrating more deeply into the plant than powdery mildew.
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Downy mildew refers to any of several types of oomycete microbes that are obligate parasites of plants. Downy mildews exclusively belong to the Peronosporaceae family. In commercial agriculture, they are a particular problem for growers of crucifers, grapes and vegetables that grow on vines.
downy mildew, disease of plants, especially in cool humid regions, caused by several funguslike organisms of the phylum Oomycota. White, gray, bluish, or violet downy patches of mildew form mostly on the undersides of leaves in damp weather.
- The Editors of Encyclopaedia Britannica
While it’s sometimes confused with Powdery Mildew, Downy Mildew is a distinct problem caused by various species of water-mold organisms, part of the Oomycetes group. This comprehensive guide will help you understand what Downy Mildew is, how to identify it, and what you can do to manage and prevent it in your garden or farm.
Nov 16, 2023 · Downy mildew colonies often appear first on the underside of leaves, and they sometimes have a bluish tinge 1,3. In many cases, they can grow systemically throughout the plant. If growing abundantly on a leaf, downy mildew colonies can be confused with gray mold (Botrytis) or with powdery mildew.
Downy mildew is what we call an obligate parasite. That’s a fun phrase to describe the fact that this plant-life-sucker is host-specific. So, the same downy mildew that’s on your sunflowers can’t jump to your cucumbers.
- Tasha Greer
May 16, 2024 · Downy mildew gets its name from the gray, fuzzy appearance of the spores formed on the undersides of infected leaves. What Is Downy Mildew? Downy mildew is a disease caused by a group of pathogens called Oomycetes.
Sep 13, 2024 · Downy mildew is a water mold organism or oomycete pathogen, and powdery mildew is a fungal disease. Downy mildew covers the surfaces of leaves in a tree-like structure, and powdery mildew develops via spore colonies that lie in chains on the upper surface or lower surface of leaves.
