blog posts Tropical storm could have carried the corn disease tar spot into the U.S. farm belt Sep 25, 2015 10:45 am by Ag ProfessionalIllinois in the News Share on Facebook Tweet Email Images Ag Professional (from Reuters, Sept. 25) - "For a commodity disease, like on corn, boy it's been a while since a new disease has been introduced." Suzanne Bissonnette, director of the Plant Diagnostic Clinic at Illinois Extension. Share on Facebook Tweet Email