Seed treatments also can control seedborne pathogens. Avoiding early planting can reduce incidence of barley yellow dwarf, wheat streak mosaic, take-all, and common root rot. Foliar fungicides can reduce severity of leaf rust, tan spot, Septoria tritici blotch, Stagonospora nodorum blotch, and powdery mildew. Unfortunately, fungicides are not always profitable, so evaluate fields carefully before spraying. Provide balanced fertility.
Excess nitrogen can cause lush stands with high humidity in the canopy.
This promotes powdery mildew and other foliar diseases. Chloride deficiency has been shown to promote development of rusts and take-all root rot. Effects of reduced tillage on wheat diseases. Destruction of hosts could also be accomplished with herbicides instead of tillage. Local versus residual impact of tillage on wheat diseases.