MSU Weed Science - Department of Crop and Soil Sciences
Mar 27th, 2017

Field Crops Entomology Program
Michigan State University

Follow AphidQueen on Twitter

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

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.