Scaphytopius delongi Young 1952c: 248Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Western X-disease phytoplasma 16SrIII-A||Phytoplasma|
|Crops Affected by Scaphytopius delongi Young 1952c: 248|
This species is a vector of the western strain of North American aster yellows virus. In 1947, Severin (701, 703) was first to report this species under the name of “Cloanthanus dubius (Van Duzee)” as a vector of this virus. Percent transmission from celery to celery obtained by males varied from 23 to 47. Thirteen percent of the population transmitted the virus. Retention of aster yellows virus varied from 1 to 29 days in single adults. No infections were obtained on aster plants nor did the species transmit curly top virus of sugarbeets.
This species is considered a vector of incidental importance in the natural spread of aster yellows virus in California.
Medium size, slender species. Length of male 4.70—4.90 mm.
General colour dark brown. Crown light brown with dark-brown longitudinal striations; pronotum dark brown; elytra dark brown with circular ivory spots.
Pygofer in lateral aspect about 11/3 times as long as wide, caudodorsal margin produced posteriorly to convex lobe; aedeagus in lateral aspect long, tubelike, slightly expanded near apex; gonopore apical; paraphyses crossing over twice, broad subapically; style in dorsal aspect with apices narrowed; female seventh sternum in ventral aspect with caudal margin broadly convex.
to which it is similar in genital characteristics,
can be distinguished by the twice-crossed aedeagal paraphyses. This species is closely related to certain western forms of
that sometimes have twice-crossed paraphyses.
|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.|