Tag Archives: western rootworm beetle

Monsanto GM Corn in Peril: Beetle develops Bt-resistance

By Rady Ananda
Food Freedom

Nature herself may be the best opponent of genetically modified crops and pesticides.  Not only plants, but insects are also developing resistance.  The Western rootworm beetle – one of the most serious threats to corn – has developed resistance to Monsanto’s Bt-corn, and entire crops are being lost. [Image]

Farmers from several Midwest states began reporting root damage to corn that was specifically engineered with a toxin to kill the rootworm.  Iowa State University entomologist Aaron Gassmann recently confirmed that the beetle, Diabrotica virgifera virgifera, has developed resistance to the Bt protein, Cry3Bb1.

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Rootworm could be resistant to genetically modified crops

By Mark Steil,
Minnesota Public Radio

An insect that can fatally weaken the root system of corn crops is overcoming the main line of defense that farmers have against the pest, posing a threat to Minnesota’s nearly $5 billion corn crop.

Western rootworm beetles climb on a corn stalk. (Photo courtesy Kenneth Ostlie/University of Minnesota)

The corn rootworm is developing resistance to genetically modified corn, which contains a protein that normally is deadly to the pest. Researchers at Iowa State University have documented what they say is the first known example of rootworms able to survive the toxin.

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