National Food Chain Safety Office, Plant Health Diagnostic National Reference Laboratory, Budapest, Hungary
The Hungarian official survey on “flavescence dorée” (FD) and its vector Scaphoideus titanus started in 2004. The leafhopper vector was first reported in 2006, since then it has been widely spread in almost all Hungarian regions. The first detection of FD phytoplasma was in August of 2013 in the south-west part of the country, after that the Hungarian national official survey was getting more extensive. In 2018 in Zala county (the most infected area) more than half of the symptomatic samples were FD positive, in case of Clematis plants 50% were infected by FD phytoplasma all around the country. The map FD-2 (16SrV-D) and FD-3 (16SrV-C) strains both are present in Hungary, map FD-2 was found only on grapevines in the south-west area, while the map FD-3 strain was detected in Clematis vitalba plants and grapevine samples collected in other regions of the country. During the official survey the grapevine samples from the counties situated east from the Danube river were always negative.
Grapevine “flavescence dorée”, Hungary, FD strains, survey
