Agriculture Corn Dust Another Threat to Honeybees Iowa Public Radio | By Amy Mayer Published February 3, 2014 at 8:06 AM CST Facebook Twitter LinkedIn Email Listen • 0:46 In her lab at Iowa State, Mary Harris keeps specimens of bees for her research on how they are impacted by environmental factors including corn dust. The way certain corn seeds get planted is having an unintended negative affect on honeybees in the Corn Belt.