According to an interview on South West Farm Press, Jeff Edwards from Oklahoma State Extension who is a wheat specialist said, "Most of Oklahoma spent at least four hours below freezing last night and some areas spent an extended period of time below 28 degrees. While temperatures in the wheat canopy might have remained slightly higher than reported air temperatures, they were still probably low enough to result in significant injury to wheat."
The one thing that may save it all is that most farmers weren't able to plant til late this season..
Generally, when wheat is flowering, freeze damage can occur when temperatures are as high as 32 degrees and stay there for more than two hours or more says Clark Neely, AgriLife Extension small grains and oil seeds specialist in College Station Texas.
There is no way of telling what kind of damage the crop has suffered for another week or two.
Neely said, "It really depends upon the weather after the freeze. If it becomes hot and dry, we'll see symptoms a lot sooner. If it stays cool, it'll take a little bit longer for those symptoms to show up."
"Kansas wheat may be damaged as well," said Jim Shroyer, Kansas State Research and Extension crop production specialist. "Wheat in the jointing stage is most at risk."
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