POWDERY MILDEW Definition & Meaning

powdery mildew

noun

any of various parasitic fungi of the ascomycete order Erysiphales, which produce a powderlike film of mycelium on the surface of host plants.
Plant Pathology. a disease caused by powdery mildew, characterized by yellowing and death of the foliage and a white mealy growth of fungus on the surface of above-ground parts.

powdery mildew

noun

a plant disease characterized by a superficial white powdery growth on stems and leaves, caused by parasitic ascomycetous fungi of the family Erysiphaceae: affects the rose, aster, apple, vine, oak, etc
any of the fungi causing this disease

powdery mildew

/ pou′��ə-��ŧ /

Any of various important plant diseases caused by fungi, especially those of the family Erysiphaceae, which produce powdery conidia on the surface of the hosts leaves and stems.

Discover More

�y��vlog History and Origins

Origin of powdery mildew¹

An Americanism dating back to 1885–90

Discover More

Compare Meanings

How does powdery mildew compare to similar and commonly confused words? Explore the most common comparisons:

Discover More

Example Sentences

Examples have not been reviewed.

While diseases such as early blight and powdery mildew are already well-known by gardeners, they are appearing more frequently, especially for those in northern climates who are experiencing warmer weather than in prior years.

From

It favors shade and mild temperatures, so if your grapes are not getting full sun, that could increase the likelihood of powdery mildew.

From

That eliminates waste, and goes a long way toward preventing diseases like powdery mildew.

From

It’s often written in notation, so “PM” will refer to powdery mildew, and “CMV” will refer to cucumber mosaic virus.

From

Maples are prone to many diseases, such as anthracnose, verticillium wilt, and powdery mildew, but I am still confused, so I call Brian Crooks, a forester with the Western Pennsylvania Conservancy.

From

Browse