Symptoms and Diaporthe ampelina isolation. a Phomopsis cane symptoms were scored on dormant canes using the following scale: (0) no Phomopsis symptoms observed; (1) light infection, small number of discrete lesions; (2) moderate infection, lesions coalescing, widespread; and (3) severe infection, lesions blackened, internode tissue corky and misshapen. b D. ampelina culture isolated from symptomatic canes (score 3), growing on potato dextrose agar. c Progression of symptoms on resistant (left) and susceptible (right) full siblings growing side by side in the vineyard on August 21 (upper) and September 10 (lower), 2013. d Phomopsis symptoms on green shoots and unripe berries