Pheromone traps have been established at sites throughout Wisconsin to monitor late-season migration flights of corn earworm moths. The results will be published below and updated weekly starting in late June and continuing through early September.
Counts for the Week Ending September 2, 2021
| County | Location | Week 1 | Week 2 | Week 3 | Week 4 | Week 5 | Week 6 | Week 7 | Week 8 | Week 9 | Week 10 |
| Columbia | Arlington | 8 | 0 | 6 | 10 | 11 | 22 | 202 | 381 | 1579 | |
| Columbia | Arlington N | 10 | 4 | 6 | 66 | 3 | 28 | 155 | 377 | 952 | |
| Columbia | Pardeeville | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 15 | |
| Dane | Bristol | | 5 | 0 | 2 | 3 | 2 | | 60 | | |
| Dane | Cottage Grove | | 0 | 3 | 12 | 4 | 3 | 23 | 56 | 172 | |
| Dane | Sun Prairie E | | 1 | 0 | 7 | 1 | 5 | | 8 | 62 | |
| Dane | Sun Prairie N | | 3 | 3 | 2 | 2 | 1 | 26 | 14 | 145 | |
| Dodge | Beaver Dam | 4 | 2 | 9 | 35 | 9 | 18 | 25 | 129 | 230 | |
| Dodge | Mayville | 10 | 3 | 7 | 27 | 24 | 30 | 115 | 704 | 854 | |
| Dodge | Watertown | | 20 | 4 | 3 | 2 | 4 | 60 | 67 | 114 | |
| Fond du Lac | Ripon | 5 | 2 | 1 | 6 | 0 | 9 | 106 | 858 | 960 | |
| Manitowoc | Manitowoc | | 1 | 0 | 8 | 1 | 7 | 13 | 38 | 250 | |
| Marathon | Wausau | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | |
| Vernon | Coon Valley | | 0 | 1 | 1 | 0 | 9 | 18 | 38 | | |
| Waushara | Hancock | 0 | | 0 | 0 | 0 | 7 | 32 | 30 | 57 | |
| Wood | Marshfield | 1 | 1 | 2 | 0 | 0 | 0 | 0 | 3 | 0 | |
| Key: Week 1 (July 1-7), Week 2 (July 8-14), Week 3 (July 15-21), Week 4 (July 22-28), Week 5 (July 29-August 4), Week 6 (August 5-11), Week 7 (August 12-18), Week 8 (August 19-25), Week 9 (August 26-September1), Week 10 (September 2-8) |
