Recent rains in some parts of Ohio may not be enough to stem the damage from high temperatures and drought conditions during corn pollination, according to an Ohio State University Extension specialist.
Pollination is the stage in corn development most sensitive to such stress conditions, said Peter Thomison, an OSU Extension agronomist.
Severe drought stress before and during pollination could cause a delay in silk emergence. If the delay lasts long enough, little or no pollen is available for fertilization when the silks finally appear, he said.
“When such delays in silking are lengthy, varying degrees of barrenness will result,” Thomison said. “This year it’s likely that silk emergence will be delayed in many drought-stressed corn fields unless we get some significant rain very soon.”
Thomison, who is also a professor in Ohio State’s Department of Horticulture and Crop Science, said the drought may be the major headline of the 2012 corn crop.… Continue reading Read More »