Definition

Noun: 1. A plant-pathogenic fungus: Any fungus that is currently classified or was historically classified within the form genus Rhizoctonia. These fungi are known to cause various diseases in plants, such as damping-off, root rot, and stem canker.

Usage

• As a subject: "Rhizoctinia is a common soil-borne pathogen."
• As an object: "The gardener identified rhizoctinia as the cause of the seedling blight."

Examples

• "The agricultural report confirmed the presence of rhizoctinia in the field."
• "Control of rhizoctinia often requires fungicide treatment and crop rotation."

Advanced Usage

• The term is primarily used in scientific, agricultural, and botanical contexts. In formal taxonomy, many fungi once called are now reclassified into other genera (like ), but the informal name persists in plant pathology.
• It is often used attributively to describe diseases or symptoms: "rhizoctinia disease," "rhizoctinia root rot."

Variants and Related Words

• Rhizoctonia: This is the standard modern spelling and the currently accepted name for the genus. "Rhizoctinia" is an older, variant form.
• Rhizoctonia solani: The name of a very common and economically important species within this group.

Synonyms

• Damping-off fungus (a descriptive term for its effect on seedlings)
• Root rot fungus (a descriptive term for one of its common effects)

Note: There are no specific idioms or phrasal verbs associated with this highly technical term.

Noun

1. any fungus now or formerly belonging to the form genus Rhizoctinia