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
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.
Powdery mildew is characterized by gray mycelial growth on leaf surfaces, while septoria/pseudocercospora leaf spot appears as brown spots that expand into broad patches. Emily Leahy, Hartford Courant, 3 May 2026 Control fungal leaf spot and insects as needed. Tom MacCubbin, The Orlando Sentinel, 2 May 2026 Fungicides, for instance, are used to suppress disease-causing pathogens like blights and leaf spots, but might also impact beneficial microbes that live in flowers. Miri Talabac, Baltimore Sun, 28 Apr. 2026 Wilting, stunted growth, yellowing or browning leaves, leaf spots, and malformed shoot tips are all possible signs of plant infection. Andy Wilcox, Better Homes & Gardens, 26 Apr. 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 10 May. 2026.

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