- Look for patterns across the field. Since diseases don’t necessarily follow rows, note what reoccurring issue you see in each spot—ponding, on ridges, etc. If you do see rows or strips it’s likely a to be spray issue or something similar, not abiotic issues.
- Get not only close-up pictures, but pictures from a distance, too, and note patterns. This helps positively identify the disease more accurately.
- Know your field history—what hybrid or variety was planted? What nutrients were used? When and what chemicals were applied? What diseases do you expect to be controlled or suppressed based on this history?
- Understand weather’s effect on your risk. If you’re working with an agronomist, make sure they know what conditions your field has undergone recently to accurately identify disease.
- Finally, if you just can’t figure out what it is reach out to experts. Local seed or chemistry representatives, university Extension agents and plant diagnostic labs can help you find out what you have to help gain control.
Scout for Corn Diseases
June 12, 2018 by Sonja Begemann