Bulletin #1020, Sooty Mold of Barley and Other Small Grains (PDF) By Steven B. Johnson, Extension crops specialist, University of Maine Cooperative Extension For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our publications and books at extension.umaine.edu/publications/. Sooty mold on grain head. Photo by Steven B. Johnson. Sooty mold of barley