834 Naturwissenschaften (2009) 96:827–834 Vidano C (1966) Scoperta della ecologia ampelofila del Cicadellide Scaphoideus littoralis Ball nella regione neartica originaria. Ann Fac Sci Agrar Univ Studi Torino III:297–302 Viggiani G (2002) Il vettore della flavenza dorata trovato in Basilicata. Inf Agrar 58:59 Wang XP, Xue FS, Hua A, Ge F (2006) Effects of diapause duration on future reproduction in the cabbage beetle, Colaphellus bowringi: positive or negative? Physiol Entomol 31:190–196 Watt AD, McFarlane AM (1991) Winter moth on Sitka spruce: synchrony of egg hatch and budburst, and its effect on larval survival. Ecol Entomol 16:387–390 Wei W, Kakizawa S, Suzuki S, Jung HY, Nishigawa H, Miyata S, Oshima K, Ugaki M, Hibi T, Namba S (2004) In planta dynamic analysis of onion yellows phytoplasma using local- ized inoculation by insect transmission. Phytopath 94:244– 250 Wipking W (1995) Influences of daylength and temperature on the period of diapause and its ending process in dormant larvae of burnet moths (Lepidoptera, Zygaenidae). Oecologia 102: 202–210 Yukawa J (2000) Synchronization of gallers with host plant phenology. Popul Ecol 42:105–113