Corn
Diseases in Ohio
Northern corn leaf blight
- Symptoms
- large leaf lesions,
usually 1/2 to 11/2 inch by 2 to 6 inch
- grayish green later
becoming tan to grayish black
- Environment
- favored by temperatures
of 65 to 78F accompanied by heavy dews
- Survival
- fungus survives
on corn, corn residues and spores dispersed by wind.
- spores are air-borne
long distances
- Management
- resistant hybrids
- clean plowdown of
corn residues
- crop rotation
- Scouting
