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Timing of Occurrence of Claviceps purpurea Ascospores in Northeast Oregon

S. C. Alderman, D. L. Walenta, and P. B. Hamm

November 2010


Ergot is an important floral disease of grasses, characterized by sclerotium formation within the host flowers. To determine whether annual variation in ergot severity in Kentucky bluegrass is a result of ascospore density and/or timing of ascospore occurrence, Burkard 7-day volumetric spores traps were used to monitor ascospores of C. purpurea in each of two Kentucky bluegrass fields in the Grand Ronde Valley in northeastern Oregon.


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