This information was summarized from a June 16 teleconference with ISU extension field specialists in crops and from comments received from members of the Iowa Independent Crop Consultants Association. Hail, causing crop damage, was reported in Hancock and Butler counties.
Uneven corn is reported in some fields, especially in the northern half of the state.
A single cause of this problem is not apparent. According to the other reports, these moths are flying in most areas of the state. Overall, weed control was reported as good. Postemergence herbicides continue to be applied. Some weed problems that were reported in corn and soybean fields included woolly cupgrass, giant ragweed, and Canada thistle.