Iowa Moth Trapping Network Update: Week 5

May 6, 2020 1:53 PM
Blog Post

Moth activity continues in Iowa. During Week 5, April 27 had the most true armyworm (TAW) moths reported across the state. Black cutworm (BCW) flights were a bit spread out throughout the week. In total, 78 BCW moths were reported across the state, which is the highest weekly total of the year.  

Last week, significant flights of BCW occurred in Washington County (southeast) on April 28 and in Marshall County (central) on April 29. A significant flight was reported in Washington County on April 13 as well but was not included in that week’s blog post. A significant flight of BCW occurs when 8 or more moths are caught in a pheromone trap over 2 consecutive nights.

Figures 1 and 2 show the total moth captures in each county from April 26 to May 2 for TAW and BCW, respectively.

TAW reports April 26 to May 2 2020
Figure 1. True armyworm moth captures from April 26 to May 2. 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 May 6, 2020.

BCW reports April 26 to May 2 2020
Figure 2. Black cutworm moth captures from April 26 to May 2. 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 May 6, 2020.

Follow the links to see reports from Weeks 1 and 2, Week 3, and Week 4.

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