Friscanus friscanus (Ball)Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Friscanus friscanus (Ball)|
This species is a vector of Pierce’s disease virus of grape in California. It was first reported as a vector of this virus by Frazier and Freitag (275) in 1946. Transmission of the virus from diseased alfalfa to healthy grape and alfalfa was accomplished, but the insect was unable to infect grape and alfalfa from diseased grape. Twenty-one percent of the plants tested were infected. Both grape and alfalfa proved to be poor hosts for feeding. Severin in 1949 (706) confirmed transmission, but reported this species as an inefficient vector of the virus owing to low longevity of adults on grape and alfalfa. The latent period of the virus varied from 1 to 6 days. In 1954, Freitag and Frazier (286) found 14.8 percent of the lots collected on Lupinus to be naturally infective.
This species is not considered an important vector of Pierce’s disease virus of grape.
Small to medium size species; male slender, macropterous; female robust, submacropterous. male 3.70—3.80 mm., female 5.40—5.80 mm.
General colour light tan. Crown and pronotum of male tan with pair of distinct sinuate longitudinal markings, female unmarked; elytra light yellowish tan.
Pygofer in lateral aspect about as long as wide, ventral margin distinctly notched near middle, caudal margin with long, narrow, prominent spine arising from caudoventral margin and projecting dorsally; aedeagus in lateral aspect broad basally, narrow, tubelike, and curved laterally at apical half; gonopore subapical on ventral surface of shaft; style in dorsal aspect with apex narrow and curved laterally; female seventh sternum in ventral aspect with caudal margin nearly truncate.
This is the only species of
that is a vector. DeLong and Severin
illustrated the genitalia and Severin
presented colored reproductions of the 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.|