Assessment of grapevine cultivars for resistance to Phakopsora euvitis

A total of 411 grapevine genotypes were screened in vitro for resistance to the rust pathogen Phakopsora euvitis. They included both rootstock and hybrid selections from 14 different Vitis species, principally V. vinifera. The majority tested were susceptible or highly susceptible. Not one was asymptomatic. The interspecific hybrid selections ‘41B’ and ‘Seibel 128’ (both rootstocks) and ‘Aurore’ showed the highest level of resistance to the pathogen.