powdery mildew
noun
1
: an ascomycetous fungus (family Erysiphaceae) producing abundant powdery conidia on the host
2
: a plant disease caused by a powdery mildew
Examples of powdery mildew in a Sentence
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Make sure to provide good air circulation around plants in very humid climates to prevent powdery mildew.
—
Arricca Elin Sansone, Southern Living, 12 May 2026
Cucumber plants are vulnerable to powdery mildew and targeted by cucumber beetles.
—Barbara Gillette, The Spruce, 12 May 2026
This cultivar is also tolerant of powdery mildew, a common plant disease that can affect the quality of dahlia flowers.
—Sophia Beams, Better Homes & Gardens, 6 May 2026
Unlike most fungal diseases, powdery mildew does not require free water on leaf surfaces to germinate; in fact, moisture on leaves can inhibit spore development.
—Rita Perwich, San Diego Union-Tribune, 2 May 2026
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Arricca Elin Sansone, Southern Living, 12 May 2026
Cucumber plants are vulnerable to powdery mildew and targeted by cucumber beetles.
—Barbara Gillette, The Spruce, 12 May 2026
This cultivar is also tolerant of powdery mildew, a common plant disease that can affect the quality of dahlia flowers.
—Sophia Beams, Better Homes & Gardens, 6 May 2026
Unlike most fungal diseases, powdery mildew does not require free water on leaf surfaces to germinate; in fact, moisture on leaves can inhibit spore development.
—Rita Perwich, San Diego Union-Tribune, 2 May 2026
See All Example Sentences for powdery mildew
Cite this Entry
“Powdery mildew.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/powdery%20mildew. Accessed 20 May. 2026.
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