Draeculacephala crassicornis Van Duzee 1915b: 181
Description & Identification
Large, slender species. male 6.50—7.10 mm female 7.50—8.30 mm. (Nielson, 1968)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.(Nielson, 1968)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. (Nielson, 1968)This species is similar to noveboracensis in general habitus and can be separated by the aedeagus with the shaft broadly subquadrate in ventral aspect.(Nielson 1968)
Biology & Ecology
The biology is unknown. It has been collected from grass in Washington (Wolfe 1955 [866] and apparently occurs in high mountain regions of the United States and Canada (Ball 1927 [32]; Beirne 1956 [58]). (Nielson, 1968)
Classification
Synonymy
Draeculacephala borealis Hamilton, 1985
Draeculacephala borealis arctoperata Hamilton, 1985
Draeculacephala borealis orea Hamilton, 1985
Additional Images
Images provided by GBIF data providers. We cannot verify that identifications are correct.
Worldwide Distribution
United States, Canada
Vector Status
Economic Crops
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.
(Nielson 1968)
The species is not considered an important vector of Pierce’s disease virus.
(Nielson 1968)
Plant Diseases
Redak et. al., 2004.
The Biology of Xylem Fluid-Feeding Insect Vectors Of Xylella fastidiosa and Their Relation to Disease Epidemiology
Redak et. al., 2004.
The Biology of Xylem Fluid-Feeding Insect Vectors Of Xylella fastidiosa and Their Relation to Disease Epidemiology
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