Graphocephala cythura (Baker 1898c: 286)Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Graphocephala cythura (Baker 1898c: 286)|
This species is a vector of Pierce’s disease virus of grape in California. Freitag et al. (287) were first to report this species as a vector of this virus in 1952. Leafhoppers fed on diseased plants from 1 to 2 days and on test plants from 2 to 10 days. Transmission of the virus from diseased grape and alfalfa to healthy grape and alfalfa was 26 percent. Confirmation of transmission of the virus has not been reported nor has the vector been shown to be naturally infective.
This species is not considered an important vector in the natural spread of this virus.
Mediurn size, slender species. Length of male 4.20—4.60 mm., female 4.60—5.00 mm.
General color yellowish brown to brown. Crown yellow with linear fuscous markings; pronotum yellow along anterior and lateral margins, brown posteriorly; elytra brown with blue band along claval suture in female specimens.
Pygofer in lateral aspect slightly longer than wide, caudal margin broadly convex; aedeagus in lateral aspect with shaft short, broad, and with pair of triangulate processes arising from near middle of shaft, shaft expanded medially, narrowed apically in ventral aspect; paraphyses asymmetrical; style in dorsal aspect simple, narrowed apically; female seventh sternum in ventral aspect with distinct spatulate process on middle of caudal margin.
to which it is closely allied,
can be distinguished by the aedeagus with the shaft broad apically in lateral aspect.
|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.|