Infected leaves show yellow stripes which turn gray and then black.
Longitudinal splits develop exposing black spore masses.
Kentucky blue grasses are most prone to infection, but bent grasses, fescues and timothies may be infected with different strains. In all western provinces. Avoid susceptible cultivars of Kentucky blue grass such as Merion and Common. Use Park where the disease is a problem. The user of this information agrees to the terms and conditions in the copyright and disclaimer .