powdery scab

noun

A disease of potato tubers, caused by the cercozoan Spongospora subterranea f. sp. subterranea, and characterized by small lesions progressing to raised pustules containing a powdery mass.

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Meanings

nounpowdery scab (uncountable)
  1. uncountableA disease of potato tubers, caused by the cercozoan Spongospora subterranea f. sp. subterranea, and characterized by small lesions progressing to raised pustules containing a powdery mass.
Cite this entry
APA

powdery scab. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/powdery%20scab

MLA

“powdery scab.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/powdery%20scab. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “powdery scab,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/powdery%20scab.

Source: powdery scab on Wiktionary, CC BY-SA 4.0.