Insect vectors of apple proliferation phytoplasma
A few years ago, it was shown that apple proliferation phytoplasma (EPPO A2 quarantine pest) was transmitted by a leafhopper Fieberiella florii in apple orchards in Germany (Krczal et al., 1989). More recently, it was found that a psyllid Cacopsylla costalis was also a vector of apple proliferation phytoplasma in apple orchards in Trentino, Italy (Frisinghelli et al., 2000).
Sources
Frisinghelli, C.; Delaiti, L.; Grando, M.S.; Forti, D.; Vindimian, M.E. (2000) Cacopsylla costalis (Flor 1861), as a vector of apple proliferation in Trentino.
Journal of Phytopathology, 148(7-8), 425-431.
Krczal, G.; Krczal, H.; Kunze, L. (1989) Fieberiella florii (Stal), a vector of apple proliferation agent.
Acta Horticulturae, no. 235, 99-106.