Handy Bt Trait Table for U.S. Corn Production

The original Bt trait table has a column titled 'Resistance to a Bt protein in the trait package has developed in:' to highlight insect x Bt combinations with documented field-failures, confirmed resistance, or cross-resistance. These statements are based on published lab assays &/or field research. This view of the Bt Table is intended to alert growers and consultants to potential management problems, influence seed selection, and encourage field scouting. Citations for resistance statements can be found here.

Documented resistance to:
Trait package Bt Protein(s) in the trait package Non-trait Refuge % (cornbelt)
Powercore Cry1A.105, Cry1F, Cry2Ab2
5%
Powercore Refuge Advanced Cry1A.105, Cry1F, Cry2Ab2
5% in bag
SmartStax Cry1A.105, Cry1F, Cry2Ab2, Cry34/35Ab1, Cry3Bb1
5%
SmartStax Refuge Advanced Cry1A.105, Cry1F, Cry2Ab2, Cry34/35Ab1, Cry3Bb1
5% in bag
SmartStax RIB Complete Cry1A.105, Cry1F, Cry2Ab2, Cry34/35Ab1, Cry3Bb1
5% in bag
VT Double PRO Cry1A.105, Cry2Ab2
5%
VT Double PRO RIB Complete Cry1A.105, Cry2Ab2
5% in bag
VT Triple PRO Cry1A.105, Cry2Ab2, Cry3Bb1
20%
VT Triple PRO RIB Complete Cry1A.105, Cry2Ab2, Cry3Bb1
10% in bag

*Check with local extension educators and seed dealers to determine if the status of Bt resistance in your particular region.