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Study shows armyworms developing Bt resistance

A new study, led by Louisiana State University, shows that armyworms are developing resistance to Bt corn.

According to Reuters, the research documents resistance by fall armyworms in the southeastern U.S. to the Cry1F protein. That protein is contained in many corn products to fight off the destructive pests.  So far, the resistant armyworms have been documented only in some areas of Florida and North Carolina.

The Bt corn at issue has been on the market since the mid-1990’s. The researchers point out that newer types of Bt corn with multiple modes of action are still showing effectiveness.