Region 1 | July 8, 2026 | Winnebago

Kathryn Seebruck
seebruck@illinois.edu

Caption: Potassium flashing in corn
Caption: Widespread cupping in soybeans
Caption: Cupped soybean leaves
SYNOPSIS

With the ample rainfall received over the past month, some fields in the area with low spots still have standing water and areas where the crop will not recover. It is advised to be diligent about scouting as fungicide application decisions are being made. As has been shared in other reports, the Crop Protection Network has useful resources that can aid in that decision making process. These include disease maps, the crop risk tool, and a fungicide ROI calculator: https://cropprotectionnetwork.org/

The corn in this field is exhibiting some potassium flashing on older leaves, which is a common occurrence in this field and tends not to have a negative effect on yield for this particular field. Little to no disease presence was noted, as only one northern corn leaf blight lesion was found.

The soybeans in this field (R2 growth stage) are exhibiting cupping on the upper canopy, and the cupping is widespread across the entire field. These are Enlist soybeans that were sprayed with Enlist + Liberty ten days prior to this field visit. There are other soybean fields within a roughly three-mile radius that are also exhibiting widespread cupping, along with fields that are not exhibiting any cupping. This could potentially be due to off-target dicamba movement.

WHICH OF THE FOLLOWING BEST DESCRIBES CURRENT CONDITIONS IN THIS COUNTY?
Mildly Wet (soil is wetter than normal, local vegetation is healthy)