black ring

noun

variants or less commonly black ring spot
1
: a virus disease of cabbage and other members of the cabbage family (Cruciferae) that is characterized by necrotic, dark, and often sunken rings on the leaf surface
2
: a virus disease of the tomato that is characterized in its initial stage by numerous small black rings on young leaves

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Cite this Entry

“Black ring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/black%20ring. Accessed 6 Dec. 2024.

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