We are in our sixth week of monitoring for black cutworm (BCW) and true armyworm (AMW) across Ohio. Despite our cold, rainy weather last week, both BCW and AMW numbers remained high in some counties. This is our final week of monitoring BCW and AMW, and at the end of this week, we will switch our traps over to corn earworm (CEW) and Western bean cutworm (WBC) for early June. Read below for more specific county information.
Black cutworm
Black cutworm numbers have mostly reduced statewide, with only Muskingum and Morgan counties reporting high trap numbers. Over the past week, our team has monitored 47 traps in 18 counties. Our overall statewide average was down this past week to 4.3 (from 7.5 last week). We recommend monitoring fields until plants reach the V6 growth stage, especially in counties that have had averages of 7 moths or more per week. This week, those counties are Muskingum and Morgan (Figure 1).
For more information on how to scout BCW, please visit: https://aginsects.osu.edu/sites/aginsects/files/imce/ENT_35_14 BCW.pdf
Black Cutworm Moth Map
Week 6
May 26th – June 1st, 2025
True Armyworm
We also monitored 47 traps in 18 counties for AMW moths (Figure 2). We are still seeing AMW, but in fewer counties across Ohio compared to BCW. However, our overall statewide average did increase this week to 4.3 moths (from last week’s average of 3.0). Similar to last week, only 3 counties reported an average of 7 or more moths: Muskingum, Van Wert, and Wood (different counties than last week).
True Armyworm Moth Map
Week 6
May 26th – June 1st, 2025
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