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Corn Disease Risk Maps
July 21, 2024
For period of July 20 – August 19, Date of Issue: July 21, 2024
CLICK ON DISEASE FOR RISK FORECAST
One-Month Weather Outlook
Over the next 30 days, above average temperatures are predicted for the entire northern region. Precipitation will be normal or above, east of the Mississippi River, with below average rainfall expected west of the Missouri River. In the next 14 days, above average temperatures and higher than normal precipitation is predicted for the north.
Gray Leaf Spot Risk Summary
Risk of gray leaf spot continues to increase for most of the Corn Belt.
Next two-week risk interpretation
Conditions are moderately to highly favorable for gray leaf spot in the Corn Belt. In spots, the disease is progressing up the canopy from the lower leaves. Areas in yellow, scout susceptible hybrids to monitor disease progression. Areas in orange, consider a fungicide application on susceptible hybrids if the disease is found on the earleaf or one leaf below the earleaf. Risk is higher in irrigated fields, corn-corn situations, and fields with heavy corn residue.
ONE-MONTH RISK MAP