Wheat grows in a test field at Oregon State University in Corvallis. Some scientists believe that there's a chance that genetically modified wheat found in one farmer's field in May is still in the seed supply. Natalie Behring/Bloomberg via Getty Images hide caption

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In Oregon, The GMO Wheat Mystery Deepens
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Crop consultant Dan Steiner inspects a field of corn near Norfolk, Neb. Dan Charles/NPR hide caption

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As Biotech Seed Falters, Insecticide Use Surges In Corn Belt
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Vernon Hugh Bowman, who took his case to the Supreme Court, lives outside the small town of Sandborn, Ind. Dan Charles/NPR hide caption

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Vernon Hugh Bowman lives outside the small town of Sandborn, Ind. Dan Charles/NPR hide caption

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Farmer's Fight With Monsanto Reaches The Supreme Court
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A farmer holds Monsanto's Roundup Ready soybean seeds at his family farm in Bunceton, Mo. Dan Gill/AP hide caption

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Central Illinois corn and soybean farmer Gary Niemeyer readies his genetically modified seed corn for spring planting at his farm near Auburn, Ill. Seth Perlman/AP hide caption

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People march demanding labels for genetically modified food near the White House in Washington, D.C., on Oct. 16, 2011. Ren Haijun/Xinhua /Landov hide caption

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Farmer Alan Madison fills a seed hopper with Monsanto hybrid seed corn near Arlington, Illinois, U.S. A group of organic and other growers say they're concerned they'll be sued by Monsanto if pollen from seeds like these drift onto their fields. Daniel Acker/Landov hide caption

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