ring rot

noun

Definition of ring rot

1 : decay in a log following closely the annual rings
2a : a disease of sweet potatoes caused by a fungus (Rhizopus stolonifer) in which the roots are girdled by bands of dry rot
b : a disease of potatoes caused by a bacterium (Clavibacter michiganensis sepedonicus synonym Corynebacterium michiganensis sepedonicus) and characterized by browning of the ring of vascular bundles

called also ring disease

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Learn More About ring rot

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Cite this Entry

“Ring rot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ring%20rot. Accessed 20 Sep. 2021.

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