Reported captures for both species in the trapping network were down from previous weeks. During Week 7 of the Iowa Moth Trapping Network, our cooperators reported 60 total black cutworm (BCW) and 22 true armyworm (TAW) moths.
Week 7 report:
The TAW moths reported during Week 7 were captured sporadically throughout the state (Figure 1), while BCW activity was statewide (Figure 2). Most of the moths were reported on May 10 for both species. No new significant flights of black cutworm occurred during Week 7.
Surrounding states also monitor and report BCW and TAW captures. If you live near the state border, it may be beneficial to check these resources periodically. More resources may be available than what is listed here:
Ashley is an education extension specialist for field crop entomology at Iowa State University. She coordinates the Iowa Moth Trapping Network, develops educational resources for field crop pests in Iowa, and aids in the research efforts of the