bio-tech corn

Amy Mayer/Harvest Public Media

More than 90 percent of U.S. field corn is genetically modified, according to data recently released by the U.S. Department of Agriculture.

Photo from the University of Nebraska

Insect scientists say federal regulators need to take action against a growing pest problem in biotech corn.

They say corn rootworm has started to become resistant to Monsanto’s Bt corn, which is genetically engineered to resist the damaging and costly pest.

The 22 scientists expressed their concerns in a letter sent to EPA last week.