Draeculacephala crassicornis Van Duzee 1915b: 181Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Blueberry leaf mottle virus Nepovirus||Virus|
|Crops Affected by Draeculacephala crassicornis Van Duzee 1915b: 181|
This species is a vector of Pierce’s disease virus of grape in California. Transmission of the virus by this species was first reported by Freitag et al. in 1952 (287). Leafhoppers fed on diseased plants from 1 to 2 days and on test plants from 2 to 10 days. It was an efficient vector, having infected 56 percent of the test plants. However, in 1954 Freitag and Frazier (286) found that it was not naturally infective after testing 610 specimens from Humboldt and Nevada Counties in California.
The species is not considered an important vector of Pierce’s disease virus.
Large, slender species. male 6.50—7.10 mm female 7.50—8.30 mm.
General color green. Crown green with fuscous areas on each side of middle; pronotum light green along anterior margin, dark green apically; elytra dark green with reticulations along apex, veins ivory or yellowish white.
Pygofer in lateral aspect about twice as long as wide, dorsal margin slightly concave, caudal margin narrowly convex; aedeagus in lateral aspect broad, with distinct broad dorsal tooth, shaft very broad, subquadrate in ventral aspect; paraphyses symmetrical with two pairs of processes, terminal pair twice as long as basal pair; style in dorsal aspect with distal half curved laterally and attenuated; female seventh sternum in ventral aspect with caudal margin slightly convex.
This species is similar to
in general habitus and can be separated by the aedeagus with the shaft broadly subquadrate in ventral 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.|