Another stress that we can learn from the daily temperature collection is the number of nights that were over 70 o F. Night time temperatures greater than 70 cause the corn plant stress because it increases respiration resulting in wasted energy and less energy for photosynthesis. Just like humans plants need time to rest and that rest does not occur when nighttime temperatures do not drop below 70. In 2022, there were a total number of 28 nights over 70 o F. That many nights over 70 definitely had an impact on corn yields in the area. Although the use of fungicide can help mitigate these warm nights I do not feel that it would help as much when we experienced that many warm nights.
Figure 3. Daily high and low temperatures for 2022 along with long term averages.
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