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
Recent Examples on the Web
Common fungal problems like powdery mildew on a variety of plants, as well as black spot on roses, can be curbed by apple cider vinegar.
—
Miranda Crowell, Better Homes & Gardens, 12 Aug. 2025
Avoid powdery mildew on tomatoes, cucumbers, squash, pumpkin and melon leaves with a quick rinse of water early in the morning.
—Nan Sterman, San Diego Union-Tribune, 6 July 2025
When things aren’t quite right Sometimes weather conditions cause botrytis, powdery mildew, rust or blackspot on susceptible roses.
—Rita Perwich, San Diego Union-Tribune, 2 Aug. 2025
Avoid problems with powdery mildew by properly spacing plants to ensure good air circulation.
—Kim Toscano, Southern Living, 3 July 2025
See All Example Sentences for powdery mildew
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Miranda Crowell, Better Homes & Gardens, 12 Aug. 2025
Avoid powdery mildew on tomatoes, cucumbers, squash, pumpkin and melon leaves with a quick rinse of water early in the morning.
—Nan Sterman, San Diego Union-Tribune, 6 July 2025
When things aren’t quite right Sometimes weather conditions cause botrytis, powdery mildew, rust or blackspot on susceptible roses.
—Rita Perwich, San Diego Union-Tribune, 2 Aug. 2025
Avoid problems with powdery mildew by properly spacing plants to ensure good air circulation.
—Kim Toscano, Southern Living, 3 July 2025
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 Aug. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share