By: John Ippolito, PAg, Regional Crop Specialist
Horizontal bands of dead or discoloured tissue were evident in some cereal crops this spring shortly after emergence. These are often referred to as temperature or chlorotic bands and are the result of temperature extremes at the soil surface as the seedlings are emerging. The leaf tissue is damaged when temperatures at the surface are either very hot or there has been a frost event. Often there are two or three bands, depending on the weather conditions during emergence.
Sensitivity to temperature extremes declines rapidly with new plant growth. The impacts of temperature banding are temporary and have no impact on subsequent yields.