MSU Weed Science - Department of Crop and Soil Sciences
Nov 22nd, 2017

Field Crops Entomology Program
Michigan State University

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For MSU weed control information, visit our sister site, MSUWEEDS.COM
For regional field crops information, visit Purdue's Chat 'n Chew Cafe

Western bean cutworm information for 2017

Western bean cutworm in corn and dry beans can be managed if infestations are caught early by scouting (corn) and trapping (dry beans). Below are several short bulletins with pictures and management recommendations. For careful scouting to detect low % infestations in corn, a face shield is worth the $$.

Managing WBC in corn
Quick recommendation sheet for corn (less detail)

Trapping and managing WBC in dry beans
Quick recommendation sheet for dry beans (less detail)


Handy Bt Trait Table - Updated for 2017

After the major issues with western bean cutworm in the Great Lakes region in 2016, and increasing problems with leps in the southern United States, a major change was made to the 2017 Handy Bt Trait table.  It now includes a new column ('May Be Ineffective On') to highlight insect x Bt combinations with documented field-failures, confirmed resistance, or cross-resistance. Ineffective ratings are based on published lab assays &/or field research. This column is intended to alert growers and consultants to potential management problems, influence seed selection, and encourage field scouting.

To view or download the trait table, click below.

2017 Bt Trait Table  (latest version, from March 15, 2017)

Citations for reduced effectiveness

NOTE - If you wish to give a link to the table on a website or in a publication, it is easiest to give this home page,, because the table is updated and reposted during the year. If you would like to reprint the table in a local publication or  extension bulletin, contact Chris DiFonzo ( or 517-353-5328) for a version modifiable for your state.