Stalk borers are notorious for killing or stunting corn rows next to fences, grassed waterways, and conservation terraces. This insect can be most troublesome in nonBt corn, which of course could include the Bt refuge acres. To stop this damage, fields must be scouted and an insecticide applied on a timely basis before the larvae have an opportunity to tunnel into the growing point of the young plants.
Iowa State University
Rice, Marlin E. and Pope, Richard O., "Stalk borers moving into southern Iowa corn" (2007). Integrated Crop Management News. 1047.
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