Weather conditions during July were favorable for infections by a couple of fungi that are known to cause ear rots of corn. Diplodia ear rot has been observed in some corn fields in Kentucky this year, but Gibberella ear rot has yet to be seen. Let us learn a little more about both.
Ears affected by Diplodia may have a white mold growing on and/or between the rows of corn kernels. Ears affected within two weeks after silking may be completely “mummified,” while in later infections, a light, cottony growth may be observed growing on the ear.