Chris DiFonzo, a Michigan State entomologist, has compiled with colleagues a farmer-friendly table of all GE corn traits and trade names. A special feature of the 2017 version of the table is getting a lot of attention – a column designating which insects, including the Southwestern corn borer larvae shown here, may be resistant to a give trait in a specific area.

A total of 29 GE-Bt corn varieties are listed in the table. All but three are listed as possibly ineffective against one or more insects the trait initially controlled. All three of these varieties contain Syngenta’s Vip3A trait, combined with Cry1Ab or Cry1Ab+Cry1F.

Each of Dow AgroSciences’s Bt corn varieties, and the six marketed by Monsanto are now compromised for one or more target insects.

Access “The Handy Bt Trait Table”, and buyer be aware.

Source: Chris DiFonzo, Pat Porter, Kelley Tilmon, “The Handy Bt Trait Table,” published online by Michigan State University Field Crops Entomology Program