Bugs resistant to genetically modified corn found

LINCOLN, Neb. (AP) _ Researchers say bugs are developing resistance to the
widely popular genetically engineered corn plants that make their own
insecticide, so farmers may have to make changes.

The Lincoln Journal Star reports that cases of rootworms eating roots of
so-called Bt corn have been confirmed in Nebraska, Iowa, Illinois, South Dakota
and Minnesota.

Iowa State University researchers say rootworms have developed resistance to
two of the four genetic traits in corn plants that are engineered to kill
rootworms.

Iowa State professor Aaron Gassmann says the problem isn't widespread yet, but
farmers and seed companies should consider changing their approaches to pest
control.

In areas where Bt corn has failed to control rootworms, farmers turned to
insecticides. The USDA says 76 percent of all corn planted last year was Bt
corn.

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