Corn
Diseases in Ohio
Eyespot
- Symptoms
- small (1/16 to 3/8
inch) circular spots with tan to gray centers
- margin of spot is
brown to purple and commonly surrounded by a yellow halo
- Environment
- common in no-till
fields with corn residues left on soil surface
- moderate temperatures
high humidity and abundant rainfall.
- Survival
- spores produced
on residues are rain splashed or wind blown onto nearby seedlings
- spots appear 4 to
10 days after infection
- Management
- clean plowdown and/or
crop rotation
- resistant hybrids
- Scouting
