Brad Clayton, OK State Agronomy Club, 425 N. Jardot Road, Stillwater, OK 74075, Robert Hunger, Ento and Plant Path, Oklahoma State University, Stillwater, OK 74078, and Craig Siegerist, Ento. and Plant Path, Oklahoma State Univeristy, Stillwater, OK 74074.
Effect of Temperature
on Reaction to Leaf Rust of Winter Wheat Caused by Puccinia triticina
Brad Clayton
Leaf rust (Puccinia triticina)
of wheat occurs wherever wheat is grown.
Yield losses are normally within the 1-10% range, but can be as high as
25-40% when conditions are favorable for the disease. This study will determine the reaction to
leaf rust of winter wheat cultivars grown historically and currently in the
Great Plains using a bulk culture of Puccinia
triticina collected from wheat growing south Texas during the spring of 2005. The reaction of the winter wheat cultivars
will be determined at 22 C and 30 C for each of the bulk cultures, and will be
assessed by measuring the reaction to leaf rust on the second leaves of
seedlings of each cultivar. The reaction
to leaf rust as determined by severity will then be used to determine
differences in the expression of resistance to the leaf rust culture by the
different cultivars at two different temperatures.
Kolmer,
James. . ARS Cereal Disease Laboratory Fact Sheet
