Well, okay...for their pockets.
http://www.technologyreview.com/Biotech/19659/Researchers have created plants that kill insects by disrupting their gene expression. The crops, which initiate a gene-silencing response called RNA interference, are a step beyond existing genetically modified crops that produce toxic proteins. Because the new crops target particular genes in particular insects, some researchers suggest that they will be safer and less likely to have unintended effects than other genetically modified plants. Others warn that it is too early to make such predictions and that the plants should be carefully tested to ensure that they do not pose environmental problems. But most researchers agree that it's unlikely that eating these plants would have adverse effects on humans.??? Emphasis Mine
But other researchers warn against jumping to that conclusion too soon. "RNA interference to control pests is an interesting idea, but it's important to understand the ecology," says Bernard Mathey-Prevot, director of the Drosophila (fruit fly) RNA Interference Screening Center at Harvard Medical School. "It's very hard to know in advance whether other insects might be targeted."
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