Armyworm and Black Cutworm Trapping Network (07/15/21)
Trap catches are summarized in Table 1. Armyworm numbers have stabilized and black cutworm numbers continue to be low. There was one report of high densities of armyworm (2-5 per square foot) in an irrigated wheat field near Park Rapids, MN. These larvae were small, about ¼ inch long and were early instars. Economic threshold is 2 larvae per square foot after wheat has headed. The grower was expecting 60-80 bu/acre wheat, so the wheat field was treated for armyworms.