CFAES Give Today
Agronomic Crops Network

Ohio State University Extension


Scout for Western Bean Cutworm Eggs

Adult Western Bean Cutworm Counts

The number of adult western bean cutworms that were caught increased dramatically over the last week (see figure).  Our previous years of trapping have shown that our hotspots for WBC activity are in the northwest and northeast Ohio, and this year we concentrated our trapping efforts in these areas.  Based on our current trapping results, we expect most of the egg laying to occur over the next week or so. 

Any corn that has not tasseled should be scouted for the presence of egg masses on the upper most leaves; the threshold is 5% of corn infested.  However, keep in mind that we have never had WBC over threshold in the 8 years it has been found in Ohio, so the likelihood of economic populations is low.  For more information, please see our fact sheet at

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.