http://motherjones.com/tom-philpott/...-super-insectsDumping a single herbicide onto millions of acres of farmland has, predictably enough, given rise to weeds resistant to that herbicide. Such "superweeds" are now galloping through cotton and corn country, forcing farmers to resort to highly toxic herbicide cocktails and even hand-weeding. More than 11 million acres are infested with Roundup-resistant weeds, up from 2.4 million acres in 2007, reckons Penn State University weed expert David Mortensen.And now insects are developing resistance to Monsanto's insecticide-infused crops, reports the Wall Street Journal. Fields planted in Monsanto's Bt corn in some areas of the Midwest are showing damage from the corn rootworm—the very species targeted by Monsanto's engineered trait. An Iowa State University scientist has conclusively identified Bt-resistant root worms in four Iowa fields, the Journal reports.