Excultanus incurvatus (Osborn & Lathrop 1923a: 346 )Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Excultanus incurvatus (Osborn & Lathrop 1923a: 346 )|
This species is a vector of the western strain of North American aster yellows virus. First reported by Severin in 1950 (707), this species transmitted the virus from diseased celery to healthy celery and aster plants. Transmission to celery was 22 percent and to aster 1 percent. The virus was retained from 11 to 22 days by males and 29 to 44 days by females.
This species is considered a potentially important vector in the spread of this virus in California
Medium size, slightly robust species. Length of male 5.70—6.20 mm., female 5.70—6.00 mm.
General color tannish brown with numerous, dark reticulations on body. Crown and pronotum tan, suffused with light brown; elytra ivory with numerous tan and dark reticulations.
Pygofer in lateral aspect about 1% times as long as wide, caudodorsal margin produced dorsally to convex lobe; aedeagus in lateral aspect recurved, tubelike, attenuated apically, apex notched in ventral aspect; gonopore apical; style in dorsal aspect with broad, curved apices; female seventh sternum in ventral aspect with caudal margin deeply and broadly concave.
This is the only species in the genus
that is a vector. It can be distinguished from other vector species by the key to the genera.
illustrated the genitalia, and Severin (1950
colour plates of the nymphs and adults.
|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.|