The cixiid planthopper Hyalesthes obsoletus Signoret is an efficient vector of the stolbur phytoplasma, the cause of various crop diseases. In the field, this monovoltine species feeds on a wide variety of woody and herbaceous plants. It overwinters as larvae on the roots of its host plants. During ...

Flavescence dorée (FD) and other types of grapevine yellows are serious diseases of grapevines caused by phytoplasmas. FD is spread by a leafhopper species and it has been shown to be transmitted by infected cuttings. Data are presented for the effective use of hot-water treatment to eliminate FD....

In a 6-year transmission trial using S. titanus, the results were negative when the source of inoculum was symptomatic plants from vineyards of the Friuli-Venezia Giulia region, Italy. Transmissions were positive when the insects were fed on Perera symptomatic grapes of the Valdobbiadene area,...