Stephen Wegulo - Extension Plant Pathologist
Due to above average temperatures this winter and going into the spring, coupled with moisture, stripe rust and leaf rust have moved north from southern states sooner than expected.
Severity of wheat diseases has increased significantly over the last week. At UNL's Agricultural Research and Development Center (ARDC) near Mead.
The first appearance of stripe rust pustules in a field indicates that spores arrived in the field and initiated infections at least seven days earlier. Apply a fungicide if stripe rust is seen in a field and the following conditions or factors exist:
- Wet, cool weather.
- The flag leaf has emerged (or earlier depending on the situation).
- It's a susceptible variety.