Studies on population dynamics and spatial distribution of leafhoppers in vineyards (Homoptera: Cicadellidae).

摘要

Thirty-two species of Cicadellidae, 10 of which were known phytoplasma vectors, were captured in vineyards in Italy, using yellow sticky traps. Adult population dynamics of the most abundant species of Penthimiinae and Deltocephalinae were studied throughout the growing season. Penthimia nigra was captured in May and June, Anoplotettix fuscovenosus in June-August, Fieberiella florii in August-October, Macrosteles sexnotatus in May and October, Scaphoideus titanus in July-September, Thamnotettix spp. in April-June, while Euscelidius variegatus, Neoaliturus fenestratus, Platymetopius major and Psammotettix spp. were trapped throughout the growing season. The aggregation of these species was investigated using Taylor's power law. A. fuscovenosus showed a nearly random distribution in vineyards, while N. fenestratus, P. major and S. titanus were strongly aggregated. The other species showed intermediate levels of aggregation. It is concluded that A. fuscovenosus, E. variegatus, F. florii, M. sexnotatus, N. fenestratus and S. titanus, known as phytoplasma vectors and commonly found in vineyards, could play a role in grapevine yellows epidemiology.