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

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

Share apple scab

Statistics for apple scab

Look-up Popularity

Time Traveler for apple scab

The first known use of apple scab was in 1883

See more words from the same year

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

a generally accepted meaning of a word

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

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!