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Answer:
Low temperatures during the early morning hours of May 9–11, 2020 may have had detrimental effects on winter wheat in some areas of South Dakota. However, cooler spring temperatures that have slowed the winter wheat development this year may have actually been beneficial to S.D. producers, as later-maturing wheat is not as susceptible to injury from freezing temperatures.
Although growth stage or maturity of the wheat is probably the most important factor, there are other factors, which can also affect the impact of freezes on winter wheat. Length and severity of frost event, plant moisture content, elevation and topography and a thinner canopy can all increase susceptibility of winter wheat to low temperatures. In addition, some varieties may also be more susceptible to a freeze than others.
A diagram showing the wheat resistance to freeze injury during different parts of the year. For a complete description, call SDSU Extension at 605-688-6729.