Armyworms Developing Resistance to Bt Corn

A 3-year research study conducted by five U.S. universities and the USDA found that fall armyworms in the southeastern U.S. are developing resistance to genetically modified crops.

According to Reuters, armyworms resistant to the Cry1F protein found in Bacillus thuringiensis (Bt) corn traits have been documented in some areas of Florida and North Carolina. Researchers don’t know the range of their presence.

Louisiana State University entomologist and lead study researcher Fangneng Huang says newer types of corn containing the Bt traits with multiple modes of action are still showing effectiveness, but they don’t know how long that will last.

Researchers encourage farmers to plant more non-GMO corn as a refuge and possibly increase their use of pesticides to control fall armyworm resistance.


  • DuPont Pioneer and Raven Industries announced information generated through Pioneer Encirca services can be sent to Raven Viper 4 and other compatible field computers by leveraging Raven’s Slingshot wireless connection — allowing growers to have Encirca prescriptions wirelessly transferred directly to compatible Raven controllers.
  • The National Transportation Safety Board ruled in November that small drones are a type of aircraft and fall under existing Federal Aviation Administration rules. The FAA has barred commercial operators from using drones, but is expected to issue a series of special permits to companies that have applied for exemptions.
  • FMC introduced 3rive 3D, a new crop-protection delivery platform that mixes FMC crop-protection products designed for 3rive with a very low water volume and air, to expand the…
To view the full article, please subscribe or login.
 Premium content is for our Digital and Premium subscribers. Please purchase a subscription to get access to all No-Till Farmer content and archives.

Top Articles

Current Issue


No-Till Farmer

Get full access NOW to the most comprehensive, powerful and easy-to-use online resource for no-tillage practices. Just one good idea will pay for your subscription hundreds of times over.

View More

Must Read Free Eguides

Download these helpful knowledge building tools

View More
Top Directory Listings