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Management of Bacterial Leaf Blight of Rice

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No single effective control measure is available. Therefore, integrated measures are suggested.
Use of resistant cultivars
Use of resistant cultivars is the most economic and environment safe strategy for the management of bacterial blight disease. Although several BB R genes have been identified and characterized, the effectiveness of these genes varies due to difference in virulence profile of the pathogen in different geographical regions. In India, a large no. of rice varieties has been released showing resistance /tolerance to bacterial blight.
Chemical Control
• Several chemicals including antibiotics have been tested and used for control of bacterial blight disease, but none of them has proved highly satisfactory. But the following measures have been tested in many places which have helped to reduce the disease severity.
Seed treatment
• 10kg seed to be soaked in 20lit water containing 1.5gm streptocycline + 20gm captan for 8-10 hours. Seeds to be shade dried before sowing. Up to 95% of seed infection can be eradicated by this seed treatment.
Hot water treatment
• Seed soaking for 12 hours and treating in hot water at 530 C for 30 minute will make the seed free from bacterium and primary infection
Seedling root dip
• It should be done in 0.1% plantomycin.
Foliar spray

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