According to the Wall Street Journal:
Over the coming weeks, federal officials say, grasshoppers will likely hatch in bigger numbers than any year since 1985. Hungry swarms caused hundreds of millions of dollars in damage that year when they devoured corn, barley, alfalfa, beets—even fence posts and the paint off the sides of barns.
A federal survey of 17 states taken last fall found critically high numbers of adult grasshoppers in parts of Idaho, Montana, Nebraska, South Dakota and Wyoming. Each mature female lays hundreds of eggs. So “the population could be very, very high this year,” said Charles Brown, who manages grasshopper suppression for the U.S. Department of Agriculture.