leaf spot

noun

: any of various plant diseases characterized by discolored often circular spots on the leaves

Examples of leaf spot in a Sentence

Recent Examples on the Web
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Signs of Disease Cucumbers are highly susceptible to plant diseases in humid climates, including fungal and bacterial leaf spot, downy mildew, powdery mildew, and viruses. Alexandra Jones, The Spruce, 20 July 2026 Keeping some garlic around can be helpful, especially for deterring alternaria brown spot and brown leaf spot, two causes of potato blight. Lauren Wellbank, Martha Stewart, 6 July 2026 During the hot rainy season some varieties are more susceptible to fungal leaf spots and mildew. Tom MacCubbin, The Orlando Sentinel, 27 June 2026 Potential diseases include anthracnose, which begins as round, brown leaf spots with a red or purple ring. Steve Bender, Southern Living, 9 June 2026 See All Example Sentences for leaf spot

Word History

First Known Use

circa 1846, in the meaning defined above

Time Traveler
The first known use of leaf spot was circa 1846

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Cite this Entry

“Leaf spot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leaf%20spot. Accessed 31 Jul. 2026.

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