title: Variation in pathogenicity and aggressiveness of Erysiphe necator from different Vitis spp. and geographic origins in the eastern United States.
authors.affiliation: Department of Plant Pathology, Cornell University, Ithaca, NY, USA.
authors.forename: Omer
authors.initials: O
authors.lastname: Frenkel
authors.forename: Marin Talbot
authors.initials: MT
authors.lastname: Brewer
authors.forename: Michael G
authors.initials: MG
authors.lastname: Milgroom