Gent, David H.; Nelson, Mark E.; Grove, Gary G.; Mahaffee, Walter F.; Turechek, William W.; Woods, Joanna L. (The American Phytopathological Society, 2012-09)
Downy mildew (caused by Pseudoperonospora humuli) and powdery mildew (caused by Podosphaera macularis) are important diseases of hop in the Pacific Northwest United States, and cultural practices may affect the severity ...
