Genetically inherited resistance is an excellent means of controlling leaf rust. Resistance limits infection and retards fungus growth and spore formation. Resistance levels vary among the classes of wheat and among varieties within a class. Varieties with MS reaction should be used with caution as damage may occur in favorable environments. Also, the natural leaf rust population is constantly changing, as shifts in virulence or new races may occur.
Varieties formerly considered resistant can become susceptible if new rust races develop.
Most of the popular hard red spring wheat varieties grown in North Dakota are resistant to the prevalent races of leaf rust. However, a few varieties have MR, MS or S reactions. Consult NDSU Extension Circular A-574, North Dakota Hard Red Spring Wheat, Hard Red Winter Wheat Variety Performance Descriptions, for current rust resistance ratings of public and private varieties. Most of the current winter wheat cultivars grown in North Dakota are susceptible to leaf rust and may require protection by fungicides. A few winter wheat varieties developed for production in Nebraska have moderate resistance to leaf rust, but these varieties often are not winter hardy under our extreme winter conditions.