rhi·zoc·to·nia
ˌrī-ˌzäk-ˈtō-nē-ə
: any of a form genus (Rhizoctonia) of imperfect fungi that includes major plant pathogens
variants
or less commonly rhizoctonia
plural -s
1
: a disease caused by fungi of Rhizoctonia or closely related genera
2
: a disease of potatoes caused by a fungus (Pellicularia filamentosa synonym Rhizoctonia solani) and characterized especially by black scurfy spots on the tubers
called also little potato, rosette, russet scab, stem canker
compare damping-offCite this Entry
“Rhizoctonia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rhizoctonia. Accessed 9 Jul. 2026.
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