The study of the dry rot disease of corn caused by Diplodia zeae shows it to be a prevalent disease in Iowa, resulting in losses, the past two seasons, ranging from 3 to 15 percent of the ears at harvest and a 11 percent damage to the seed corn. The loss in stand from diseased seed in many fields a mounted to 15 percent. A still further loss results from nodal infection and weak plants grown from slightly infected seed.
Durrell, L. W.
"Dry rot of corn,"
Research Bulletin (Iowa Agriculture and Home Economics Experiment Station): Vol. 5
, Article 1.
Available at: https://lib.dr.iastate.edu/researchbulletin/vol5/iss77/1