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The Biggest Threat to Monsanto

Jacob Roche
August 30, 2011

There's a fly in the ointment at Monsanto (NYSE: MON  ) . Or, rather, a rootworm in the corn field. Western corn rootworms have been found in four pest-resistant fields in Iowa, and while you might think it's normal for some bugs to make it past even Monsanto's vaunted pest-resistant genetically modified corn, the corn in question was designed to resist this specific pest. If the bug is developing its own resistance to the corn, that could open a whole can of worms for Monsanto.

The world of genetically modified crops is fiercely competitive, with Monsanto, DuPont (