First report of Cylindrocladiella lageniformis and C. peruviana as grapevine pathogens in California.
In 2012, 2-year-old Chardonnay grapes grafted onto 101-14 Mgt rootstock in a commercial vineyard in the Salinas Valley (Monterey County) of California, USA, displayed symptoms of black-foot disease. Symptoms consisted of stunted shoots, shoot dieback and reduced root biomass. Internal tissues of the roots and trunks exhibited brown to black streaking. Approximately 2% of the planting was affected. The causal pathogens were identified as Cylindrocladiella lageniformis and C. peruviana based on morphological, genetic (ITS) and pathogenicity analyses. This is thought to be the first record of C. lageniformis and C. peruviana associated with a disease of grapes in California.