sourceTaxonName: Pseudoperonospora humuli
targetTaxonName: Humulus lupulus
localityName: United States
referenceCitation: Johnson, D.A., Skotland, C.B., and Alldredge, J.R.. 1983. Weather factors affecting downy mildew epidemics of hops in the Yakima Valley of Washington. Phytopathology 73:490-493