Visual symptom identification of grapevine leafroll-associated virus 3 (GLRaV-3) in the field trial across three regional locations (Auckland, Hawke’s Bay, and Marlborough) and two red-berry cultivars (Merlot and Pinot noir) for vintage 2015 (triangle points), 2016 (square points), and 2017 (circle points). Data are percentages of Merlot and Pinot noir vines (left and right, respectively) singly infected GLRaV-3 (irrespective of genotype) that were visually identified as GLRaV-3-positive based on distinctive foliar changes (i.e., assessed as a “2” or “3” based on the symptom assessment scale). Over the three vintages, no visual symptoms were observed on any white-berry cultivars (Pinot gris and Sauvignon blanc) at any of the regional locations; therefore the results are not displayed.