2010 Growing Season
Figure 1. Daily minimum temperatures (7-day moving average) for Des Moines, IA, in 2009 and 2010, and 30-yr average minimum daily temperatures (1981-2010). Approximate dates of 10%, 50%, and 90% silking in Iowa in 2009 and 2010 based on USDA crop progress reports.
Figure 2. Average minimum temperatures experienced in July-August of 2009 (top) and 2010 (above) and average yields (bu/acre) in Iowa, Illinois, Missouri, Kansas and Nebraska. Data from NCEI NOAA, USDA NASS.
University of Illinois Study
Table 1. Effect of night temperature from silking through physiological maturity on corn yields (Peters et al., 1971).
Further Research on Temperature Effects
Table 2. Effect of temperature on grain fill duration, grain weight per plant and kernel number (Badu-Apraku et al., 1983).
Higher Rate of Respiration
Accelerated Phenological Development
Table 3. Simulations conducted with Hybrid-Maize resulting days in reproductive stages and total days to maturity at five Iowa State University Research and Demonstration Farms.
Authors: Mark Jeschke, Nanticha Lutt, and Stephen D. Strachan
July 2018
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.