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rice blast

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noun Plant Pathology.
  1. a disease of rice caused by the fungus Pyricularia oryae, characterized by elliptical leaf spots with reddish-brown margins, brownish lesions and neck rot of the fruiting panicles, and stunting of the plant.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018