As the corn in northwest Kansas continues to move through the final vegetative stages of growth and tassels have just started to emerge, Western Bean Cutworm is a pest to monitor. Reports of western bean cutworm egg masses in northwest and west central Kansas began over the last week and scouting has begun.
Western bean cutworms are primarily a pest of corn in Kansas and activity is generally isolated to the western part of the state. Early detection of egg masses is important, as any chemical control needs to happen before larvae enter corn ears. When the field is almost fully tasseled, an average of 8% of plants with eggs or small caterpillars justify control measures.