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.
Iowa State University
Rice, Marlin E. and Pope, Richard O., "Scouting and management of stalk borers" (1999). Integrated Crop Management News. 2227.
The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.