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Leaf smut

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1. This is a minor disease and is characterized by appearance of minute, sooty, dull, angular patches on the leaves, which represents the sori. In susceptible varieties, the fungus almost covers the entire leaf surface of the older leaves.
2. The disease is caused by Entyloma oryzae, which produces tel iospores and these are angular to globose, smooth-walled, light brown in colour.
3. The disease perennates through sori lying in infected plant debris.
4. Spores reaching the leaves near the soil level cause infection. High nitrogen enhances the disease incidence.
Control of the disease may be achieved by:
• Clean cultivation
• Growing resistant varieties

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ICAR NEH, Umiam
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