By Peter Thomison, Pierce Paul, Bruce Clevenger, and Glen Arnold, Ohio State University Extension
Moldy ear problems have been reported in northwest Ohio, especially in certain corn hybrids planted late after June 1. The moldy ears have been attributed to Diplodia and Gibberella fungal infection. Vomitoxins (associated with Gibberalla) have been found in some of the later planted, wetter corn (>25%). The few preliminary reports received to date suggest that vomitoxin levels are lower and vomitoxin problems far more limited in scope than in 2009. This is largely because, compared to 2009, conditions this year were relatively dry during the first few weeks after pollination, which restricted the development of Gibberella ear rot.
Although some level of infection may have occurred at silking, conditions during early grain-fill were in general not favorable for widespread ear rot development and mycotoxin contamination, except in some of the later planted fields. As was the case in 2009, molds have often been associated with upright ears.… Continue readingRead More »