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Agronomic Crops Network

Ohio State University Extension


Western Bean Cutworm: Scouting in Select Counties Still Necessary

Western bean cutworm egg mass

A number of counties saw a decrease in Western bean cutworm (WBC) moths captured last week (July 29 – August 4); however, there are still counties that need to be on the lookout for WBC egg masses and larvae. Overall, 25 counties monitored 79 traps across Ohio and resulted in 824 WBC adults (down from 2842 total last week) and a statewide average of 10.4 moths/trap (down from 36.0 average last week) (Figure 1). Counties that have averages indicating scouting for WBC egg masses and larvae include: Ashtabula, Defiance Fulton, Geauga, Hancock, Lake, Lorain, Lucas, Paulding, Williams and Wood. You can view our scouting video here

Trap data from this week confirms the 2019 WBC peak flight across Ohio occurred from July 22-28 (Figure 2).

Moth Counts for Western Bean Cutworm

 Figure 1. Average Western bean cutworm adult per trap followed by total number of traps in the county in parentheses for week ending August 4, 2019.

Figure 2. Average western bean cutworm (WBC) per trap in monitoring counties in Ohio for 2016 (blue), 2017 (red), 2018 (green) and 2019 (purple).

Crop Observation and Recommendation Network

C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.