Entries » Illinois Western Bean Cutworm Monitoring 2013

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NameIllinois Western Bean Cutworm Monitoring 2013
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Western bean cutworm was first found in Illinois in 2004. Reports of this insect have been increasing since then and the eastward range expansion continues.

Moths begin emerging in mid-June and lay eggs on corn plants. Soon after hatch, larvae leave the upper leaf surface and move to the whorl. Yound larvae will feed on the leaves and tassels. As they mature, larvae begin to feed directly on silks. As both corn and larvae mature, larvae move into the ears and feed on developing kernels. Larvae are very mobile and may infest plants in the same or adjacent rows.