Gnawing away at invasives


Only 3.2 percent of the 50 million federally owned acres overrun with invasive weeds were treated in 2009. That puts infested land on track to double by 2019. Meanwhile, some conservationists suggest a more palatable strategy: Eat the invaders that are devouring our ecosystems. Unfortunately, some of the West's most insidious aliens, like tamarisk, may not be suitable for fork-to-mouth