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Pre-disposing Factors of Rice Blast

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1.The presence of a thin film of water on the leaf surface favors the infection.

2.Low night temperature (below 240C) coupled with high relative humidity favors the dew formation on the leaf surface and thus, helps in rapid spread of the disease.

3. Blast is more severe in upland than in lowland ecosystem. 

 

File Courtesy: 
Rice Blast Disease and its Management ( Dr. Krishnaveni)
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