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False Smut of Rice

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Symptoms: The fungus transforms individual grains into greenish spore balls of velvetty appearance.

Due to the development of the fructification of the pathogen, the ovaries are transformed into large velvetty green masses. Usually only a few spikelets in a panicle are affected.

Pathogen: Ustilaginoidea virens (Syn : Claviceps oryzae - sativa). Chlamydospores are formed on the sporeballs, they are spherical to elliptical, waxy and olivaceous.

Favourable conditions: Rainfall and cloudy weather during the flowering and maturity periods are favourable.

File Courtesy: 
C S Azad University of Agriculture and Technology, Kanpur
Photo Courtesy: 
C S Azad University of Agriculture and Technology, Kanpur
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