Iowa Moth Trapping Network Update: Week 4

April 30, 2020 9:41 AM
Blog Post

Black cutworm (BCW) and true armyworm (TAW) moths continue to be active in Iowa. Last week, our cooperators in southern Iowa reported 37 total TAW moths. April 24 seemed to be the date with the largest flights: 14 TAW moths were caught around the state on that day alone. BCW moths were more widespread in Iowa compared to previous weeks. 31 BCW moths were caught across the state from April 22-24, but no significant flights have occurred yet (8 or more moths caught in a pheromone trap over 2 consecutive nights).  

Figures 1 and 2 show the total moth captures in each county from April 19 to April 25 for TAW and BCW, respectively.

TAW reports April 19 to April 25 2020
Figure 1. True armyworm moth captures from April 19 to April 25. The total moth count for the time period is noted on the map; highlighted counties without numbers indicate that traps are placed but no reports have been received. Data is current as of April 29, 2020.

BCW reports April 19 to April 25 2020
Figure 2. Black cutworm moth captures from April 19 to April 25. The total moth count for the time period is noted on the map; highlighted counties without numbers indicate that traps are placed but no reports have been received. Data is current as of April 29, 2020.

Reports from Weeks 1 and 2 can be found here.

Reports from Week 3 can be found here.

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:

Author: 

Ashley Dean Extension Program Specialist III

Ashley is an extension program 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