
Overuse of Bt corn is harmful to overall effectiveness
Corn rootworm is the number one pest that corn growers have to manage every single year. For years, one of the top rootworm management tools has been Bt corn. However, due to widespread usage, the effectiveness of Bt corn has decreased over time. Something needs to be done now to ensure that Bt corn remains as an effective tool in the farmer’s toolbox. Aaron Gassmann, professor of plant pathology at Iowa State University, said his lab has been studying this for well over a decade. Gassmann...