Many Ohio corn fields have been subject to excessive rainfall this year. The fields where the Ohio Corn Performance Test (OCPT) were planted are no exception. Extraordinary rainfall accumulation has occurred at nearly all OCPT sites. Rainfall accumulations from May 15 to July 18-19 (and there’s been more since then) range from 14 to 19.1 inches at test sites in the southwest/west central/central region.
Reports of short, waist high corn tasseling, as well as uneven development and flowering within fields, are not uncommon in parts of the state where heavy rains contributed to extended periods of saturated soil conditions and ponding. Now there are questions as to whether such uneven development will impact pollination and thereby affect yield.
There are two techniques commonly used to assess the success or failure of pollination. One involves simply waiting until the developing ovules (kernels) appear as watery blisters (the R2 or the “blister” stage of kernel development).… Continue reading