To get to this conclusion, researchers (funded by the non-profit Bat Conservation International) looked at 12 plots of corn in Illinois during the growing seasons of 2013 and 2014. In 6 of the areas, the researchers erected huge netting enclosures every night, keeping the bats at bay. In the other 6, bats were allowed to go about their batty business. The researchers found that the plots of land that were prevented from having bats had roughly 60 percent more corn earworm larvae gnawing on the ears of corn. The non-bat plots also had more fungus growing on the corn.