°Distinct Red Blotch Disease Epidemiological Dynamics in Two Nearby Vineyards

In this work, we demonstrate patterns in red blotch disease onset as it relates to grapevine red blotch virus (GRBV) infection source. When the scion is the source of infection, disease symptoms are apparent one year post-planting; whereas infected rootstocks may take three-to-five years. Furthermore, we used diagnostic tools to determine the GRBV phylogenetic clade presence in vineyards and surrounding inoculum to determine levels of secondary spread within the vineyards. This is the first work to use phylogenetic clade differentiation in conjunction with spatial analysis to disentangle GRBV infections due to the planting material and S. festinus-mediated transmission

Flasco et al. (2023) Viruses