Corn Disease Risk Maps

One-Month Weather Outlook

In the next 30 days, temperatures will be above average. Precipitation will be below average south of I-90, in regions surrounding the Missouri River. In the next 14 days, temperatures will be average to above average. Precipitation should remain normal, except for regions east of I-55, which should expect higher than normal precipitation.

Gray Leaf Spot Risk Summary

Gray leaf spot risk is moderate to high within much of the Corn Belt, except for the northern-most states.

Next two-week risk interpretation

Conditions in the southern regions remain moderately to highly favorable for this disease. Areas in orange, a fungicide application is recommended on susceptible hybrids if the field is around the tassel stage. Areas in yellow, scout susceptible hybrids. If lesions are found one leaf below the earleaf & the field is around tassel, a fungicide application is recommended on susceptible hybrids. Risk is higher in no-till & c/c situations.

ONE-MONTH RISK MAP