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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Sweet corn > Unusual growth on ear

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Sweet corn > Ear > Unusual growth on ear

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Corn Smut
Ustilago maydis

  • On ears, kernels swell into large pale green to silvery brown galls, up to five inches in diameter
  • As the galls on ears mature, they turn purplish black and become spongy
  • Powdery, black sooty spores emerge from cracked galls
  • Raised, firm pale green to brown bumps form on leaves, stems and tassels
  • More information on Corn Smut...

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