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
If your plant has powdery mildew, leaf spot, or gray mold, pick off the worst of the leaves and then spray the mum with a fungicide labeled for the condition.
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Brandee Gruener, Southern Living, 21 Sep. 2025
Hormonal activity in trees, including that related to flower bud formation, is also negatively impacted by poor root health
Due to crape myrtle’s sensitivity to powdery mildew foliar fungus, hybrid varieties resistant to this fungus have been developed.
—Joshua Siskin, Oc Register, 13 Sep. 2025
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
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
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Brandee Gruener, Southern Living, 21 Sep. 2025
Hormonal activity in trees, including that related to flower bud formation, is also negatively impacted by poor root health
Due to crape myrtle’s sensitivity to powdery mildew foliar fungus, hybrid varieties resistant to this fungus have been developed.
—Joshua Siskin, Oc Register, 13 Sep. 2025
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
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
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 22 Sep. 2025.
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