Source: Purdue University

Peak western bean cutworm moth flight has occurred at many trapping locations in Indiana, but certainly not all. This indicates that there are more moths to emerge, mate and deposit eggs in fields of their choosing. A current common frustration of pest managers is determining where egg masses are being deposited once corn has begun pollinating, especially when nearby trap counts are still high.

Egg deposition is preferred in pre-tassel corn, but most corn has now advanced into reproductive stages. Because female moths seem to have a strong affinity to certain hybrids (e.g., color, architecture, etc.) or situations (e.g., growth stage, soil type, stress, etc.) they may pass over nearby fields to deposit eggs. This suggests that eggs masses will be distributed in fields further away and/or clumped in an area of a field to their liking (e.g., delayed maturity). In other words, scouting will be more challenging.

Original news release