powdery mildew


Definition of powdery mildew

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 Phlox is one of the plants that is particularly sensitive to powdery mildew. Janet B. Carson, Arkansas Online, 14 May 2022 Keep leaves of cucumber, melon, and squash dry to stave off powdery mildew. Deanna Kizis, Sunset Magazine, 11 May 2022 What is the best product to prevent powdery mildew on honeysuckle. oregonlive, 12 Dec. 2021 This application will greatly reduce the future incidence and severity of the three main fungal diseases that afflict roses — powdery mildew, rust and black spot. Earl Nickel, San Francisco Chronicle, 1 Apr. 2022 Remove congested wood on the interior of the plant to maintain good air circulation, which helps avoid powdery mildew. oregonlive, 13 Feb. 2022 The Chinese dogwood is far more resistant to both dogwood anthracnose and powdery mildew that can plague the native flowering dogwood in some locations. Paul Cappiello, The Courier-Journal, 14 Jan. 2022 Some neem oil products also control fungal diseases such as powdery mildew and blackspot. Megan Hughes, Better Homes & Gardens, 2 Nov. 2021 For example, those with scale, powdery mildew or even white flies. Jeff Lowenfels, Anchorage Daily News, 28 Oct. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'powdery mildew.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of powdery mildew

1889, in the meaning defined at sense 1

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The first known use of powdery mildew was in 1889

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Dictionary Entries Near powdery mildew


powdery mildew

powdery scab

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Last Updated

17 May 2022

Cite this Entry

“Powdery mildew.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/powdery%20mildew. Accessed 20 May. 2022.

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Britannica.com: Encyclopedia article about powdery mildew


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