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False smut

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Causal organism:- ustilago noidea virus

Symptom

1. False smut start as light green ball of spores covered by a thin silver colored skin. The balls erupt exposing the orange spores.

2. As time passes spores turn dark green to black. Damage from smuts occur due to contamination of other grains by spores during harvest, miiling causing quality problems and discoloration during paraboiling and cooking.

Management

1. Excessive nitrogen increases diseases.

2. Use resistant varities

3. At early stage of panicle initiation or at 50% flowering use mancozeb 0.25% or diethane M 45 ot copper oxychloride 25kg/ltr.

File Courtesy: 
IGKV,Raipur
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