Source: University of Missouri
Diplodia ear rot of corn was unusually widespread and severe on corn throughout most of Missouri during the 2009 season.
Since the primary source of inoculums for the disease is diseased corn debris left in the field, planting corn in a field which had high levels of diplodia ear rot in 2009 greatly increases the risk of the disease occurring in 2010 corn. The risk for diplodia ear rot will also be influenced by weather conditions after silking with the risk being greatest if wet weather occurs after silking. The following article covers symptoms, factors favoring disease development and management options for diplodia ear rot of corn.