Corn
Diseases in Ohio
Holcus spot
- Symptoms
- spots at first are
dark green and watersoaked, later turning brown or whitish with reddish-brown
borders and are round, oval or irregular in shape.
- Environment
- warm temperature
(75 to 85°F), wet, windy weather early in season.
- Survival
- bacteria survive
on crop residues, and are spread by splashing rain, blowing soil particles
and cultivation during heavy dews.
- Management
- resistant hybrids
- clean plowdown of
corn residues and crop rotation.
