While the heat will be impacting nearly the entire Cornbelt, there is a strip of several hundred thousand acres that is doubly affected. That is the region where the derecho winds last Monday laid waste to corn fields, farmsteads, and even grain elevators. While the winds were tracked from Central Nebraska into the Province of Ontario, some particularly heavy facility damage occurred between Marshalltown and Cedar Rapids, Iowa.
However, corn was flattened and with the heat settling in for the week, there are uncertainties how the disabled crop will react. The corn apparently had strong enough stalks to avoid green snap, says IL agronomist Emerson Nafziger. With some roots pulled out and leaves disoriented, it is difficult to predict the potential for yield loss, but it may not be as bad as it looks. And he adds, such a situation slows the water uptake and it may help roots re-establish themselves.
As flattened corn proceeds through its pollination process, agronomists do anticipate some degree of “goosenecking” as the top of the plant attempts to return to a vertical orientation. However, those corn plants will not totally recover, and will likely become a harvest nightmare. They have already become a problem for seed companies which may have lost many of their fields in the affected area.
Watch for USDA’s Crop Progress Report on Monday afternoon to learn however crop statisticians in the affected states begin to evaluate the damage from the winds.
Weather conditions for the coming few days will not be friendly to corn, particularly corn that is going through the pollination phase. High nighttime temperatures will hamper pollen shed, and curled leaves will hamper sunlight reception; both of which have a substantial impact on potential yield. Corn that was flattened by the severe winds of last week will likely be trying to regain a vertical orientation by “goosenecking,” but yields will still be reduced.
Source: the FarmGate blog