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