Figure 1. Maximum and minimum soil temperatures reported at the Eau Claire Research Station.
Figure 2. Stand reduction (target stand – final stand) by planting date as reported in the frost survey.
Morning following overnight lows of 28 F. Note watersoaked leaf tissue.
May 18, three days post-frost. Note regrowth pushing above soil line.
June 7, three weeks post-frost. Note regrowth and interplant variability.
Figure 3. Corn stand reduction in surveyed fields associated with stressful emergence conditions. Red: >6,000 plants/acre reduction from target stand, yellow: 2,000-6,000 plants/acre reduction, green: <2,000 plants/acre reduction. Stand reduction at select locations east of St. Cloud, MN may have been exacerbated by soil crusting.
Author: Kelly Herbick
The foregoing is provided for informational use only. Please contact your Pioneer sales professional for information and suggestions specific to your operation. Product performance is variable and depends on many factors such as moisture and heat stress, soil type, management practices and environmental stress as well as disease and pest pressures. Individual results may vary.