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blast

A disease caused by the fungus Pyricularia grisea. Leaf lesions are typically spindle-shaped, wide in the center and pointed toward either end. Large lesions usually develop gray centers. The disease can have different forms: leaf blast, node blast, or neck blast. Lesions on panicle neck nodes may result in empty panicles (often called rice blast), "rotten neck" or "neck rot" symptoms.

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