Discovered in Canada and now Connecticut, ECB spread would be a major pest problem not seen for decades.

The European Corn Borer (ECB), one of North America’s most destructive crop pests, has been effectively managed for more than 25 years through the widespread adoption of Bt corn. However, the recent discovery of field-evolved resistance to Bt toxins — first in Canada and then in Connecticut — has raised concerns about its potential resurgence as a significant agricultural...