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Filtering by: Creator Weisberg, Stephen B. License Public Domain Mark 1.0

Afternoon Ascospore Release in Claviceps purpurea Optimizes Perennial Ryegrass Infection

Creator:

Alderman, Stephen C., Walenta, Darrin L., Hamm, Philip B., Martin, Ruth C., Dung, Jeremiah, and Kosman, Evsey

Abstract:

In Kentucky bluegrass (Poa pratensis), Claviceps purpurea, the causal agent of ergot, typically releases ascospores during the early-morning hours, between about midnight and 10:00 A.M., corresponding to time of flowering, when the unfertilized ovaries are most susceptible to infection. During aeromycology studies of C. purpurea in perennial ryegrass (Lolium perenne)...

Resource Type:

Article
Distribution and Characterization of Podosphaera macularis Virulent on Hop Cultivars Possessing R6-Based Resistance to Powdery Mildew

Creator:

Wolfenbarger, Sierra N., Massie, Stephen T., Ocamb, Cynthia, Eck, Emily B., Grove, Gary G., Nelson, Mark E., Probst, Claudia, Twomey, Megan C., and Gent, David H.

Abstract:

Host resistance, both quantitative and qualitative, is the preferred long-term approach for disease management in many pathosystems, including powdery mildew of hop (Podosphaera macularis). In 2012, an epidemic of powdery mildew occurred in Washington and Idaho on previously resistant cultivars whose resistance was putatively based on the gene designated R6....

Resource Type:

Article