FIGURE 1.

Examples of the effects of GLRaVs on Cabernet Franc leaves, canopy density, and cluster size. (a) Photographs depicting leaves from Cabernet Franc grapevines grafted to MGT 101‐14. The photographed leaves were from (left to right) GLRaV (−), GLRaV‐1 (+), GLRaV‐1,3 (+), and GLRaV‐1,2 (+). The photograph of the GLRaV (−) leaf was taken on 2018‐08‐13. The photographs of the leaves from GLRaV (+) were taken on 2018‐08‐08. The purpose of these photographs is to depict the range of leafroll disease symptoms in leaves observed in the study. The symptoms should not be construed as specific to certain infections. (b) Canopy and berry clusters from GLRaV (−) and GLRaV‐1,2 (+) in different rootstock conditions on 2017‐08‐14