2020 UMN Cooperative Black Cutworm Trapping Network Report #4

Report #4 Week of April 18 - April 24, 2020

For more information: Black Cutworm Reporting Network

April 30, 2020

Greetings:

Black cutworm captures mapWow, what difference from last year. Depending on the area, many growers are finished or nearly finished with corn planting and some have finished soybeans as well. Additionally, black cutworm (BCW) moth arrival is delayed with respect to planting progress this year. Both of these factors are favorable for crop production.

This past week more traps indicated migrating black cutworm (BCW) moths arriving in Minnesota but numbers at each positive location were still very low (Figure 1).

A Rock County trap was the exception with two moths on 4/21 and then four more on 4/23. However, these are still below the numbers typically associated with an outbreak flight. A Steel County trap had two moths the morning of 4/24. All other traps captured single moths.

Date                       County with capture

April 19                 Freeborn, Murray

April 20                  Jackson, Olmsted,

April 21                  Jackson, Lincoln, Rock -2

April 22                  Jackson

April 23                  Brown, Jackson, Martin, Rock-4,

April 24                  Lac Qui Parle, Lincoln, Martin, Murray, Steele -2

Make a note of when fields were worked and planted.  We will see addition captures April 25- 28. Based on the weather patterns, I don’t expect any of these to be significant but… I always leave some room for surprises when predicting.

Next we’ll discuss how these trap results, combined with planting date and hybrid selection can aid in scouting.

Bruce Potter and Travis Vollmer

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