Corn Disease Risk Maps

One-Month Weather Outlook

In the next 30 days, lower-than-normal temperatures are predicted for the northern regions. Average precipitation is expected for regions west of the Missouri River and east of Ohio. For the next two weeks, temperatures are expected to be lower than normal for regions north of I-80. Precipitation varies from average to above average within the Corn Belt.

Gray Leaf Spot Risk Summary

The risk for gray leaf spot is moderate to high within most of the Corn Belt.

Next two-week risk interpretation

Conditions in the Corn Belt remain moderately or highly favorable for gray leaf spot. Areas in orange, consider spraying susceptible hybrids that have not reached the R5/dent stage, especially later maturity hybrids and fields that will be harvested towards the end of the growing season. Areas in yellow, consider treatment on later maturity products that will be harvested towards the end of the season and that have not yet reached the R5/dent stage.

ONE-MONTH RISK MAP