Tan spot is being reported on winter and spring wheat fields in southern Manitoba.
Highest levels have been seen in wheat on wheat rotations, with infestation mostly on lower leaves.
A long wet period is needed before tan spot or septoria will spread to upper leaves.
Monitor fields before the flag leaf stage. A fungicide is advisable if lower leaves have more than 10 percent infection and wet weather is predicted.
Neither North Dakota nor Manitoba has reported leaf rust and southern states report only light leaf rust.
A potential exists for barley yellow dwarf.
