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ring spot

American

noun

Plant Pathology.

any of various plant diseases caused by a virus or fungus and characterized by concentric rings of discoloration or necrosis on the leaves.

First recorded in 1905–10

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ring spot

In plants used for landscaping, two of the most common viruses are peony ring spot and rose mosaic virus.

From Textbooks ● Jun. 9, 2022

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023