Question

Which is the causal organism responsible for the stem rot of carnations?

• A. Rhizoctonia
• B. Botrytis
• C. Fusarium
• D. Uromyces

Hint:

To manage stem rot in carnations, ensure proper drainage, use disease-free planting material, and apply appropriate fungicides.

Answer 1

The Correct Option is C

Fusarium is identified as the pathogen causing stem rot in carnations. This disease manifests through vascular wilt and stem base rot, originating from root and stem tissue infections. Symptoms include yellowing, wilting, and ultimately, plant demise.
Option (A) Rhizoctonia: Incorrect. While it affects some crops with damping off and root rot, it is not the primary cause of carnation stem rot.
Option (B) Botrytis: Incorrect. Botrytis cinerea is known for grey mold on various flowers but is not the principal agent of stem rot in carnations.
Option (C) Fusarium: Correct. Fusarium species, particularly Fusarium oxysporum, are accountable for stem rot in carnations.
Option (D) Uromyces: Incorrect. Uromyces is linked to rust diseases, not stem rot.