Stalk borers are notorious for killing or stunting the corn rows next to fences, grassy waterways, and conservation terraces. Control measures can be taken to prevent this damage, but fields must first be scouted and then the economics of treatment should be considered. Stalk borer larvae have already hatched and most of the larvae are now in brome or other grasses, and in giant ragweed. However, some stalk borers may already be in corn because they moved there first instead of the grass. Eventually, the stalk borers in the grass get too big for the grass stems and they disperse in search of larger-diameter plants, which often happens to be corn.