How high heat disrupts corn pollination
The insidious part of this pattern is that extended periods of heat tend to diminish yields even more. When soil moisture is sufficient, one day of 95-98°F has little or no impact on yields. However, after the fourth consecutive day there tends to be a 1% loss in yield for each day above that temperature. After the fifth or sixth day, there tends to be even greater potential for yield loss. While it is difficult to make yield loss predictions from heat and drought stress in any year, the stress does add up and take a toll on the crop.
- Senescence and Receptivity of Maize Silks by Paolo Bassetti and Mark Westgage, Crop Science, 33: 275-278. Abstract
- High Temperature Stress and Pollen Viability of Maize by Maria Pilar Herrero and R.R. Johnson, Crop Science 20: 796-800. Abstract