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False smut (Ustilaginoidea virens)

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1. Its incidence is increasing on high-yielding rice varieties. The fungus transforms the individual grains in to large greenish velvety spore-balls.

2. High relative humidity, rainy and cloudy days during the flowering period increase the incidence of the disease.

3. The application of organic manures and high dose of nitrogenous fertilizers also increase the intensity of attack.

4. To control this disease, give first spray of Blitox 50 WP (copper oxychloride) @ 500 g in 200 litres of water per acre at boot stage of the crop in disease prone areas followed by second spray with Tilt 25 EC @ 200 ml in 200 litres of water after 10 days interval.

File Courtesy: 
Punjab Agricultural University, Ludhiana
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
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