True Armyworm

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Pheromone traps have been established at sites throughout Wisconsin to monitor early-season migration flights of true armyworm moths. Counts from the trapping su​rvey provide data on the ti​ming of armyworm arrival into Wisconsin and are useful for planning field scouting activities. The results of the 2021 survey are presented below and will be updated weekly through early June. Current multistate migration maps are available at True Armyworm - Corn ipmPIPE.​​​

​True Armyworm Moth Counts for the Week Ending May 27​​​, 2021

​​County
​Location​
​Week 1
​Week 2
​Week 3
​Week 4
​Week 5
​Week 6
​Week 7
​Week 8
​Barron
​Barron
​0
​0
​0
​0
​0
​0
​0​0
​Barron
​Dallas
​0
​0
​0
​0
​0
​0
​0​0
​Columbia
​Pardeeville E
​0
​0
​0
​0
​0
​1
​0​0
​Columbia
​Pardeeville W
​0
​0
​0
​2
​55
​1
​0​12
​Dane
​Middleton
​0
​0
​0
​0
​0
​0
​0​0
​Dane
​Verona
​0
​0
​0
​0
​3
​0
​0​0
​Dodge
​Lowell
​0
​0
​0​
​0
​1
​0
​0​4
​Fond du Lac
​Johnsburg
​0
​0
​0
​0
​42
​9
​23​7
​Green
​Browntown
​0
​0
​0
​0
​1
​0
​2​8
​Green
​Monroe NE
​0
​0
​0
​0
​2
​4
​1​1
​Green
​New Glarus E
​0
​0
​0
​4
​7
​9
​4​2
​Iowa
​Barneveld
​0
​0
​0
​0
​0
​2
​4​7
​Iowa
​Mineral Point NE
​0
​0
​0
​0
​6
​9
​4​41
​Iowa
​Mineral Point S
​0
​0
​0
​0
​0
​0
​0​2
​La Crosse
​Onalaska
​0
​0
​0
​0
​0
​0
​0​0
​La Crosse
​Rockland
​0
​0
​0
​0
​0
0
​0​0
​Lafayette
Darlington W
​0
​0
​0
​2
​3
​3
​19​42
​Lafayette
​Wiota
​0
​0
​0
​0
​3
​0
​0​0
​Monroe
​Sparta
​0
​0
​0
​0
​0
​0
​0​0
​Vernon
​Stoddard
​0
​0​
​0
​0
​0
​1
​0​0
​Key: Week 1 (April 1-7); Week 2 (April 8-14); Week 3 (April 15-21); Week 4 (April 22-28); Week 5 (April 29-May 5); Week 6 (May 6-12); Week 7 (May 13-1​9); Week 8 (May 20-26); Week 9 (May 27-June 9)​ ​ ​ ​ ​ ​ ​ ​ ​
​​