Early planting increases the chance of fall infections. Severely infected seedlings are stressed and are more susceptible to winter injury. Adequate fertilization based on a soil test should reduce the possibility of severe yield loss due to leaf rust. Where greater amounts of nitrogen have been applied to wheat without sufficient potassium and phosphorus, leaf rust has disproportionately reduced yields. Following soil test recommendations should increase yield without increasing the susceptibility of the crop.
Fungicides are available for control of leaf rust on wheat.
Application of a fungicide is recommended only when the yield potential of the crop is high, the wheat variety is susceptible to leaf rust, the disease started early and the flag leaf is in danger of becoming infected. Obtain a copy of OSU Extension Bulletin 786 for more information on leaf rust from your county OSU Extension office. Current fungicide recommendation for leaf rust control can also be obtained from your OSU Extension office. All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status. Keith L. Smith, Associate Vice President for Ag.