Integrated Crop Management is published by the Department of Entomology , Iowa State University , Ames, Iowa. Stalk borer migration out of brome grass into adjacent corn should be underway in southern and central Iowa. Fields that had stand loss last year in the border rows should be scouted for this insect. These plants have young larvae tunneling in the grass stem.
Top number shows degree days.
Bottom number shows expected date for 10 percent migration. This information subject to a usage policy .