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corn smut

a disease of corn caused by a fungus, Ustilago maydis, and characterized by blackish, powdery masses of spores on the affected parts of the plant.
1880-85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for corn smut
  • corn smut, a fungus, has an unexpected benefit: a surprisingly good flavor.
  • Some days there would be a real thrill: finding corn smut or chasing deer out of our main production field.
  • Influence of corn smut and hail damage on the yield of certain first-generation hybrids between synthetic varieties.
  • corn smut does not affect enough ears to be a problem.
  • The infested tips become swollen, often resembling miniature corn smut, and once the adults emerge the galls have numerous holes.
British Dictionary definitions for corn smut

corn smut

an ascomycetous parasitic fungus, Ustilago zeae, that causes gall-like deformations on maize grain
the condition produced by this fungus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for corn smut

disease of plants caused by the fungus Ustilago maydis, which attacks corn (maize) plants, affecting any aboveground part. The early signs of an attack are whitish galls that later rupture to release dark spores capable of infecting other corn plants. Affected plants are often distorted. The disease is most vigorous in warm weather. Spores overwinter in soil and in corn litter and then infect the next year's planting.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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