BCW 2024 Issue 07

Report #7 May 18-24, 2024
For more information: https://z.umn.edu/bcw-reporting
May 28, 2024

A map of Minnesota with different colored areas showing BCW moth captures 2024 trapping season
Figure 1. Black cutworm moth captures for the 2024 trapping season.  Shading represents the maximum two-night captures for trap(s) in the county. 

You can find additional information on cutworm ID and economic thresholds in black cutworm on corn.

True armyworm (TAW)
Roseau Count continues to capture large numbers of moths. While some moths have been captured in many other trap locations, numbers have remained low with the possible exception of a couple SC MN traps. Historically, most armyworm problems occur in late June and early July so don’t ignore high risk fields when scouting.

This is shaping up to be one of the cool, wet springs that armyworms often do well in. Remember to keep armyworms in your grass seed, corn and small grain scouting this year. For more information on armyworms see: https://extension.umn.edu/corn-pest-management/armyworm.

Projections based on historical average temperatures.

Many thanks to 2024 cooperators (2022). You did a great job this spring and provided a perspective on this season’s black cutworm and armyworm risks. Some of you have been helping with this project for a long time. A special thanks to Gretchen Thillen, UMN Southwest Research and Outreach Center for help with getting the newsletters for the web.

table 2 showing 2024 cooperators MN Cooperative BCW Trapping Network.

This project is supported, in part, by the farm families of Minnesota and their corn check-off investment.

Bruce Potter
University of Minnesota Extension IPM Specialist
University of Minnesota SW Research and Outreach Center
23669 130th Street
Lamberton, MN 56152
[email protected]
Cell: (507) 276-1184