Flavescence dorée (FD) is a European quarantine grapevine disease transmitted by the
Deltocephalinae leafhopper Scaphoideus titanus. Whereas this vector had been introduced
from North America, the possible European origin of FD phytoplasma needed to be
challenged and correlated with ecological and genetic drivers of FD emergence. For that
purpose, a survey of genetic diversity of these phytoplasmas in grapevines, S. titanus, black
alders, alder leafhoppers and clematis were conducted in five European countries. Out of …

… 2 Institute for Plant Protection and Environment … insect vectors … When a Palearctic
bacterium meets a Nearctic insect vector: genetic and ecological insights into the emergence
of the grapevine ‘Candidatus Phytoplasma vitis’ and ‘Ca. P. vitialni’ epidemics in Europe. …