First report of Grapevine flavescence dorée phytoplasma in Bulgaria
The NPPO of Bulgaria recently informed the EPPO Secretariat of the detection of Grapevine flavescence dorée phytoplasma (EPPO A2 List) in grapevine on its territory. The phytoplasma had previously been detected in wild plants of Clematitis vitalba and Ailanthus altissima.
In September 2025, a vineyard owner in Svishtov (Veliko Tarnovo province, Northern and Eastern Bulgaria region) noticed symptoms of phytoplasma infection on grapevine (Vitis vinifera) and informed a research institute who confirmed the presence of the pathogen and reported the finding to the NPPO of Bulgaria. The identity of the pathogen was confirmed by molecular testing at the National Reference Laboratory in December 2025. The infested area is 20.66 ha.
The vector Scaphoideus titanus is known to occur in Bulgaria but its presence in the infested area has not been confirmed.
Official phytosanitary measures are implemented to eradicate the pest. They include restriction on the movement of host plants in the demarcated area. Intensive surveys will be conducted to detect the presence of the phytoplasma and S. titanus. Trace-back investigations are ongoing.
The pest status of Grapevine flavescence dorée phytoplasma in Bulgaria is officially declared as: Present, in specific parts of the Member State, where host crop(s) are grown.
Sources
NPPO of Bulgaria (2026-02).