The focus of this project includes: i) evaluation of the effectiveness and economics of rogueing, a cultural practice focus on the removal and replacement of virus infected vines; ii) investigation of novel techniques to prevent infections based on recently developed molecular techniques; iii) assessment of methods to manage insect vectors responsible for the transmission of GLRaV-3 and GRBV; and iv) determine the economic impact that both GLD and GRBD have on grapevine production in Canada.