Fall Armyworm Trap Network Summary 2025
DATCP's fall armyworm trap network monitored late summer moth migration flights for seven weeks, from August 1 to September 18. During the 2025 survey, the 27 network traps captured a cumulative total of 11,992 moths, or an average of 444 moths per trap. Most of the traps registered seven-week totals of 250 moths or less, though four sites in Grant, Sauk, and Sheboygan counties captured 1,000 or more moths. The heaviest flights were documented in the southwest area September 5 to 18, and the single highest cumulative count was 3,901 moths at Lancaster in Grant County. The September flights occurred too late to produce damaging larval populations and, unlike the
true armyworm which reached outbreak levels in July, fall armyworm was not a major threat to crop production in Wisconsin this season.
Moth Counts for the 2025 Season
County
|
Location |
Week 1
|
Week 2
|
Week 3 |
Week 4 |
Week 5
|
Week 6
|
Week 7
|
Calumet
| Kesler
| 0
| 7
| 93
| |
| 23
| 1
|
Columbia
| Cambria
| 35
| 11
| 5
| 5
| 1
| 2
| 0 |
Columbia
| Columbus
| 0
| 0
| 0
| 0
| 0
| 0
| 0 |
Columbia
| Lodi L
| 2
| 3
| 0
| 8
| 10
| 1
| 2
|
Columbia
| Lodi M
| 4
| 5
| 1
| 5
| 4
| 2
| 5 |
Columbia
| Pardeeville
| 0
| 0
| 1
| 1
| 4
| 0
| 0 |
Columbia
| Portage W
| 6
| 2
| 0
| 2
| 0
| 0
| 1 |
Dodge
| Beaver Dam
| 40
| 5
| 0
| 2
| 12
| 9 | 38
|
Dodge
| Leroy
| 45
| 53
| 45
| 7
| 6
| 0 | |
Dodge
| Rubicon
| 10
| 13
| 308
| 39
| 14
| 54
| 211
|
Door
| Sturgeon Bay
| 117
| 8
| 88
| | | 12
| |
Grant
| Lancaster 1
| 123
| 294
| 168
| 144
| 164
| 1305
| 1703
|
Grant
| Lancaster 2
| 226
| 0
| 42
| 69
| 93
| 871
| 712
|
Green
| Brodhead
| 5
| 377
| 30
| 102
| 29
| 80
| 19
|
Monroe
| Monroe
| 29
| 4
| 1
| 0
|
| 0
| 1
|
Oconto
| Mountain
| 1
| 5
| 8
| 3
| 1
| 0
| 0 |
Ozaukee
| Fredonia
| 42
| 26
| 36
| 5
| 0
|
| 43*
|
Rock
| Clinton N
| 0
| 0
| 1
| 2
| 1
| 2
| 3 |
Rock
| Janesville N
| 6
| 20
| 0
| 6
| 1 | 23
| 56
|
Rock
| Janesville S
| 36
| 29
| 5
| 5
| 6 | 28
| 41
|
Sauk
| Reedsburg
| 17
| 54
| 3
| 30
| 125
| 15
| 20
|
Sauk
| Spring Green
| 175
| 73
| 69
| 215
| 306
| 166
| 293
|
Sheboygan
| Oostburg
|
| 76
| 0
| 0
| 4
| 2
| 3
|
Sheboygan
| Wilson
| 219
| 263
| 438
| 143
| 91
| 163
| 219
|
Trempeauleau
| Ettrick
| 22
| 33
|
| | |
| |
Walworth
| Delavan
| 4
| 61 | 9
| 2
| 13
| 3
| 9
|
Walworth
| Sharon
| 6
| 127
| 2
| 17
| 14
| 27
| 41
|
Week 1 (Aug 1-7); Week 2 (Aug 8-14); Week 3 (Aug 15-21); Week 4 (Aug 22-28); Week 5 (Aug 29-Sep 4); Week 6 (Sep 5-11); Week 7 (Sept 12-18). *Trap counts represent a 14-day period.
Multistate fall arymworm migration maps are available at Great Lakes and Maritimes Pest Monitoring Network
(select FAW tab) and Fall Armyworm corn ipmPIPE.