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Mode of Spread and Survival of Rice Blast

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1. The disease spreads primarily through airborne conidia since spores of the fungus present throughout the year.

2. Mycelium and conidia in the infected straw and seeds are important sources of inoculum. Irrigation water may carry the conidia to different fields.

3. The fungus also survives on collateral hosts viz., Panicum repens, Digitaria magrginata, Brachiaria mutica, Leersia hexandra, Dinebra retroflea, Echinochloa crusgalli and Stenotaphrum secondatum.

File Courtesy: 
BAU Ranchi
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