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

Recent Examples of apple scab from the Web

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.

First Known Use of apple scab

1883

in the meaning defined above

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