Are specific microbiota from the phyllosphere of American Vitis species involved to their resistance to downy mildew?
The oomycete Plasmopara viticola (Berk. & M.A. Curtis) Berl. & De Toni, the causal agent of grapevine downy mildew, originated in the northeastern United States and was accidentally introduced into Europe in the mid-19th century.
