Scaphoideus titanus Ball 1932a: 15Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Grapevine flavescence dorée phytoplasma 16SrV-C||Phytoplasma|
|Grapevine flavescence dorée phytoplasma 16SrV-D||Phytoplasma|
|Crops Affected by Scaphoideus titanus Ball 1932a: 15|
This species is a vector of “flavescence doree” virus of grapevines in southern France. Transmission of the virus was first reported by Schvester et al. in 1961 (674) and later confirmed by Schvester et al. in 1963 (675, 676). Leafhoppers were collected from vines severely infected with the virus and placed on 89 healthy vines at intervals of 4 weeks over a 2-month period. Three months later 17 plants were infected and showed typical symptoms of the disease; 3 plants had suspicious and 10 doubtful symptoms. None of the 30 check plants were diseased. In 1964 Vidano (838) produced similar symptoms due to feeding by the leafhopper in Italy, where the virus is not known to occur.
This species is an important vector of this virus in southern France and is potentially important in other grape-growing areas of Europe, where it may spread.
Medium size, linear species. Length of male 4.90—5.20 mm., female 5.40—6.10 mm.
General color reddish brown, Crown light tan with fine dark line on anterior margin; pronotum and scutellum dark reddish brown; elytra reddish brown with few light ivory irregular spots on commissure.
Pygofer in lateral aspect about twice as long as wide, caudal margin narrowly convex; aedeagus in lateral aspect very broad basally with short shaft and pair of lateral apical processes near apex; gonopore terminal; style in dorsal aspect with apices long, attenuated, slightly curved laterally, female seventh sternum in ventral aspect with caudal margin broadly convex.
species is similar to
and can be distinguished by the male pygofer with the caudal margin somewhat narrowly convexed, the aedeagus with the shaft curved laterally at the distal end, and the style with the apex sharply attenuated.
|Nielson, M. W. 1968b. The leafhopper vectors of phytopathogenic viruses (Homoptera, Cicadellidae). Taxonomy, biology and virus transmission. United States Department of Agriculture Technical Bulletin . 1382 386 pp.|