apple scab

noun

Definition of apple scab

: a disease of apple trees caused by a fungus (Venturia inaequalis) producing dark blotches or lesions on the leaves, fruit, and sometimes the young twigs

Examples of apple scab in a Sentence

Recent Examples on the Web It was designed to be more resistant to one of the most pernicious diseases in the fruit world — apple scab. Connie Nelson, Star Tribune, "Newest Minnesota-made apple may not be a star, but it's a game changer," 17 Feb. 2021 Applying dormant sprays – Superior oil, copper and sulfur – helps control nasty pests and diseases like codling moths and apple scab. Kym Pokorny | For The Oregonian/oregonlive, oregonlive, "Get a leg up on fruit tree problems with dormant oils," 28 Dec. 2020 One more thing before moving into the relative warmth of the garage: Gather fruit hanging in trees or rotting on the ground and get it out of there to minimize diseases and pests such as apple scab and coddling moth next year. oregonlive, "The garden chores that can’t wait as winter sets in," 24 Nov. 2020 Their trees embrace myriad molds, viruses, and fungi: apple scab, black pox, southern blight, union necrosis. Helen Rosner, The New Yorker, "How Apples Go Bad," 8 June 2020 Apples are susceptible to a whole bucket of diseases like powdery mildew, apple scab and anthracnose. oregonlive, "Now’s the time for pruning and spraying apple trees: Here are some tips," 11 Feb. 2020 For example, flowering crabapple trees are susceptible to a fungus disease called apple scab, so choose a crabapple cultivar selected to resist the disease. Beth Botts, chicagotribune.com, "Think about space, pests, diversity before buying a new tree," 25 Apr. 2018 Applying dormant sprays — superior oil, copper and sulfur — helps control nasty pests and diseases like codling moths and apple scab. The Oregonian/oregonlive, OregonLive.com, "Newspaper corrections for Feb. 14, 2018," 13 Feb. 2018 Applying dormant sprays - Superior oil, copper, and lime sulfur - helps control nasty pests and diseases like codling moths and apple scab. Kym Pokorny, OregonLive.com, "Winter is the time to get ahead of fruit tree problems," 7 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'apple scab.' 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 apple scab

1883, in the meaning defined above

Keep scrolling for more

Learn More about apple scab

Time Traveler for apple scab

Time Traveler

The first known use of apple scab was in 1883

See more words from the same year

Statistics for apple scab

Last Updated

23 Feb 2021

Cite this Entry

“Apple scab.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/apple%20scab. Accessed 27 Feb. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

More from Merriam-Webster on apple scab

Britannica.com: Encyclopedia article about apple scab

Comments on apple scab

What made you want to look up apple scab? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

February 2021 Words of the Day Quiz

  • squirrel in winter
  • Which is a synonym of perdure?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

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