Monday, August 29, 2011

Monsanto Modified Corn Losing Bug Resistance

Monsanto Modified Corn Losing Bug Resistance:

CornAgribusiness monster corporation Monsanto is in peril of creating a worse problem than it purports to solve with its genetically modified corn plants. Scott Kilman reports for the Wall Street Journal:

Widely grown corn plants that Monsanto Co. genetically modified to thwart a voracious bug are falling prey to that very pest in a few Iowa fields, the first time a major Midwest scourge has developed resistance to a genetically modified crop.

The discovery raises concerns that the way some farmers are using biotech crops could spawn superbugs.

Iowa State University entomologist Aaron Gassmann’s discovery that western corn rootworms in four northeast Iowa fields have evolved to resist the natural pesticide made by Monsanto’s corn plant could encourage some farmers to switch to insect-proof seeds sold by competitors of the St. Louis crop biotechnology giant, and to return to spraying harsher synthetic insecticides on their fields.

“These are isolated cases, and it isn’t clear how widespread the problem will become,” said Dr. Gassmann in an interview. “But it is an early warning that management practices need to change.”

The finding adds fuel to the race among crop biotechnology rivals to locate the next generation of genes that can protect plants from insects. Scientists at Monsanto and Syngenta AG of Basel, Switzerland, are already researching how to use a medical breakthrough called RNA interference to, among other things, make crops deadly for insects to eat. If this works, a bug munching on such a plant could ingest genetic code that turns off one of its essential genes.

Monsanto said its rootworm-resistant corn seed lines are working as it expected “on more than 99% of the acres planted with this technology” and that it is too early to know what the Iowa State University study means for farmers.

The discovery comes amid a debate about whether the genetically modified crops that now saturate the Farm Belt are changing how some farmers operate in undesirable ways.

These insect-proof and herbicide-resistant crops make farming so much easier that many growers rely heavily on the technology, violating a basic tenet of pest management, which warns that using one method year after year gives more opportunity for pests to adapt…

[continues in the Wall Street Journal]

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