Rootworms develop resistance to Bt corn, say researchers - KWWL - Eastern Iowa Breaking News, Weather, Closings

Rootworms develop resistance to Bt corn, say researchers

Posted: Updated:
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.

Cases of rootworms eating roots of so-called Bt corn have been confirmed in Nebraska, Iowa, Illinois, South Dakota and Minnesota, according to the Lincoln Journal Star.

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.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
  • NEWSNEWSMore>>

  • Touch a Truck

    Touch a Truck

    Tuesday, July 29 2014 4:46 AM EDT2014-07-29 08:46:34 GMT
    The Junior League of Waterloo-Cedar Falls is hosting the 5th Annual Touch-a-Truck event.This event is an outdoor event held at the National Cattle Congress on Saturday, August 16 from 11am-2pm.Kids will be able to get up close and personal with over 20 different vehicles, such as police cars, ambulances, dump trucks and excavators.More >>
    The Junior League of Waterloo-Cedar Falls is hosting the 5th Annual Touch-a-Truck event.This event is an outdoor event held at the National Cattle Congress on Saturday, August 16 from 11am-2pm.Kids will be able to get up close and personal with over 20 different vehicles, such as police cars, ambulances, dump trucks and excavators.
    More >>
  • National heroin epidemic spreads through Iowa

    National heroin epidemic spreads through Iowa

    Monday, July 28 2014 11:46 PM EDT2014-07-29 03:46:19 GMT
    The recent rise in heroin abuse across the county is injecting eastern Iowa, and local, state, and federal leaders are trying to figure out why. More >>
    The recent rise in heroin abuse across the county is injecting eastern Iowa, and local, state, and federal leaders are trying to figure out why. More >>
  • Tenant ready to move in to former Rath admin building

    Tenant ready to move in to former Rath admin building

    Monday, July 28 2014 11:44 PM EDT2014-07-29 03:44:30 GMT
    One of eastern Iowa's lasting remnants showing the impact of the farm crisis may finally be getting a long-awaited makeover.More >>
    One of eastern Iowa's lasting remnants showing the impact of the farm crisis may finally be getting a long-awaited makeover.More >>
Powered by WorldNow
All content © Copyright 2000 - 2014 WorldNow and KWWL. All Rights Reserved.
For more information on this site, please read our Privacy Policy and Terms of Service and Mobile Privacy Policy & Terms of Service.

Persons with disabilities who need assistance with issues relating to the content of this station's public inspection file should contact Administrative Assistant Sandy Youngblut at 319-291-1259. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, at 888-835-5322 (TTY) or at fccinfo@fcc.gov.