Best recommendation: Continue planting the remainder of your crop acres, says Nielsen. After four to five days, surviving corn plants should be showing new leaf tissue expanding from the whorls. The dead tissue of the damaged part of the whorl may restrict this leaf extension for a while. But in most cases it won't restrict it completely.
About your wheat and barley . . .
Generally more than 2 hours of exposure to 28 F temperatures in the boot stage or 30 F in the heading stage is required to cause injury. Some areas received that, notes Roth.
Frost injury symptoms may be difficult to diagnose for a few days or a week. One symptom of minor injury you may see would be heads having difficulty emerging from the boot.
In more severe cases white or discolored heads may be evident. In the worst cases, complete head sterility is common. This Kansas State publication provides some detailed scouting guidelines for diagnosing the impacts of freeze damage on wheat.
Often the heads appear normal even though the anthers are dead. Anthers are more sensitive to freeze damage than other plant parts. Carefully examine the anthers. If they're white and desiccated instead of their normal light green or yellow color, they may not produce grain.
Late this week or early next, determine how much damage has occurred for both crop insurance assessment and the potential to salvage damaged crops for forage.
Every decision that you make influences the size and scope for corn yields. From the corn hybrid you select to the seeding rate and row width you choose. Download our FREE report over Maximizing Your Corn Yield.