1 leaf spot | Definition of leaf spot

leaf spot

noun

Definition of leaf spot

: 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

Phlox are susceptible to several fungal diseases that start at the bottom and move upwards, such as powdery mildew or leaf spots. Ellen Nibali, baltimoresun.com, "Garden Q&A: The very hungry caterpillars and protecting the phlox," 15 Aug. 2019 Newer varieties appear more resistant to fungal leaf spots that plagued zinnias during hot, wet months. Tom Maccubbin, orlandosentinel.com, "Zinnias can be added to summer gardens in Florida," 27 July 2019 Look for plants that appear healthy with nice, green leaves, not yellow or brown and spotted foliage, which may indicate they’re infected with a fungus called Septoria leaf spot. Arricca Elin Sansone, House Beautiful, "How to Plant Black-Eyed Susans," 8 Aug. 2019 Larger cactus and traditional flowered types, — which usually have to be started from seed — develop some leaf spotting but can grow and flower through the summer. Tom Maccubbin, orlandosentinel.com, "Zinnias can be added to summer gardens in Florida," 27 July 2019 The department says anyone who has purchased a rhododendron from Walmart or Rural King since April should monitor the plants for leaf spots and dying branches or limbs. USA TODAY, "Saving whales, Manson murder house: News from around our 50 states," 17 July 2019 Clematis fungal leaf spot mainly infects leaves and does not get into the root system. Ellen Nibali, baltimoresun.com, "Garden Q&A: My clematis has spots and what is this blue worm-like thing?," 3 July 2019 Other fungi disease may cause leaf spots, such as on dogwoods and tomatoes. Jo Ellen Meyers Sharp, Indianapolis Star, "The Hoosier Gardener: Weather prime for fungus problems," 28 June 2019 Boxwood blight produces dark brown leaf spots and causes rapid defoliation that sometimes kills young boxwoods. USA TODAY, "Arthur Ashe, missing Marilyn, pacifier-eating pup: News from around our 50 states," 21 June 2019

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

See More

First Known Use of leaf spot

circa 1846, in the meaning defined above

Keep scrolling for more

More from Merriam-Webster on leaf spot

Rhyming Dictionary: Words that rhyme with leaf spot