Figure 49. European corn borer larva in soybean stem. There presence is often indicated by wilting leaves in the top of the plant.

Because the European corn borer is a polyphagous insect, it has been reported on a number of other crops. Some of these include apple, chrysanthemum, lima bean, soybean, black-eyed pea, small grains, sorghum, tomato, onion, and sage. When European corn borer is found on these crops, it is usually related to incidental infestations resulting from high populations in corn. Soybean adjacent to corn may have minor infestations (Figure 49). Occasionally, there are isolated cases where somewhat heavy infestations of larvae occur on these other crops. Often, the borers do not develop to the reproductive adult stage. Infestations may cause significant economic losses, depending on the value of the crop. Crops with a high value and low consumer tolerance for damage, such as apples, can have a substantial economic loss due to infestation of fruit.