Diplodia ear rot of corn can reduce yield and grain quality by damaging kernels, lowering grain test weight, and reducing grain fill. Incidence of affected ears in the field can vary from 1 to 2 percent to as high as 80 percent. Disease levels are usually highest in fields with conservation tillage and/or continuous corn.
This publication discusses symptoms, signs, cause, disease development, and management options. The publication is enhanced by color images that will aid in diagnosing Diplodia ear rot.
Diplodia Ear Rot (PPFS-AG-C-05) is available online.
For additional publications on corn diseases, visit the UK Plant Pathology Extension Publications webpage.
By Cheryl Kaiser, Plant Pathology Extension Support, and Kiersten Wise, Plant Pathology Extension Specialist