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 Overhead watering can cause diseases like cercospora leaf spot, a fungus, to form on the leaves. Patricia Shannon, Southern Living, 22 Mar. 2024 Septoria leaf spot is most severe when wet, humid weather persists for extended periods of time. Tim Johnson, Chicago Tribune, 10 Sep. 2023 Fungal leaf spot is generally brown in the center with a dark border. Tim Johnson, Chicago Tribune, 19 Aug. 2023 There is a similar-looking bacterial disease called angular leaf spot that can affect black-eyed Susans. Tim Johnson, Chicago Tribune, 10 Sep. 2023 Leaf blotch and leaf spots can also happen when temperatures are high or leaves are overwatered. Southern Living Editors, Southern Living, 22 Aug. 2023 Bacterial leaf spot: Various bacteria cause small, reddish-brown spots on leaves. Steve Bender, Southern Living, 15 Aug. 2023 Vogan suspects that Starships transferring key genes between fungal pathogens may have created the new strains that cause rolling epidemics of wheat diseases, such as tan spot (yellow leaf spot). Saugat Bolakhe, Quanta Magazine, 3 Aug. 2023 This is normally the case with algal leaf spot found on camellias, hollies, Indian hawthorns and magnolias. Tom MacCubbin, orlandosentinel.com, 5 June 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'leaf spot.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

circa 1846, in the meaning defined above

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

Dictionary Entries Near leaf spot

Cite this Entry

“Leaf spot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leaf%20spot. Accessed 13 Apr. 2024.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!