2017 U of MN Cooperative Black Cutworm Trapping Network Issue 3

Report #3 Week of APRIL 8-14, 2017

This newsletter is available in a print-friendly pdf format: 2017 Black Cutworm Network Issue 3

Maximum black cutworm trappings by county throughout southern Minnesota for April 8-14, 2017

Maximum black cutworm moth captures by county. April 8-14, 2017

Southerly wind flows with rain brought more captures the week of April 8-14. However, we still did not have any locations that have warranted starting cutting projections for the 2017 crop. This is a good thing!

Moth captures were scattered throughout the week with the 11th and 12th being the most active dates for capture. Think about the weather the night of the 10th/11th

The Wabasha County trap was most active and had 3 moth on the 8th and another 3 on the 13th. Other counties that had captures were:

  • Yellow Medicine 1-11th, 1-14th
  • Watonwan 1-11th, 2-12th
  • Blue Earth 1-11th
  • Martin 1-9th
  • Renville 1-12th
  • Waseca 2-12th

Some spring tillage and planting has occurred. Those fields where 2016 soybean residue that had been worked this spring before any significant moth flights arrived are at much less risk for black cutworm damage to the 2017 crop. Next week we’ll focus on how to prioritize scouting efforts.

I suspect that the next week will show some yellow and at least one red county. Richard Wurtzberger’s trap in Brown County had 8 moths on the morning of April 15th. The cell phone picture of Richard’s trap was a little blurry but it showed several black cutworm moths…or maybe some tiny sasquatches.

Thanks for all your diligence in checking these traps and reporting the data!

Note to cooperators: If your trap has been operating for three weeks you might consider changing the pheromone. Hopefully, you have been removing any cutworm moths when you count them but trap bottoms can get covered with dirt and debris and should be changed when that happens. Keep reporting both positive and negative captures each week and a quick email if a trap captures 8 or more moths over a 2-night period will be appreciated.

Until next week,

- Bruce Potter and Travis Vollmer