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Species Account


NMW; Female; 'OREG Josephine Co; Dune area south Winchuck River'; Coll.: Oman; Date: 15 june 1972
i14206

NMW; Male; 'Montara, CAL'; Coll.: Oman; Date: 1935
i14207

NMW; Male; 'Montara, CAL'; Coll.: Oman; Date: 1935
i14208

NMW; Female; 'OREG Josephine Co; Dune area south Winchuck River'; Coll.: Oman; Date: 15 june 1972
NMW Image No. i14206

Friscanus friscanus (Ball)

Membracoidea : Cicadellidae
Diseases Transmitted

Distribution Map
(simplified continental distribution)
Geographical Distribution:

Recorded Distribution(s):
It is restricted to the San Francisco Bay area of California and is not known to occur outside of this State.

(Nielson, 1968)

Friscanus friscanus (Ball)
Diseases Transmitted Pathogen Type
Crops Affected by Friscanus friscanus (Ball)
Rice Citrus Carrot
Barley Apple Tomato
Maize (Corn) Pear Potato
Sugarcane Elm Strawberry
Wheat Palms Rubus
Sorghum Grapevine Papaya
Other (grasses/cereals) Ornamentals Peach

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.


(Nielson 1968)

This species is not considered an important vector of Pierce’s disease virus of grape.


(Nielson 1968)

Identification Plates
Friscanus friscanus


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Plate 1
Species Description

Length:
Small to medium size species; male slender, macropterous; female robust, submacropterous. male 3.70—3.80 mm., female 5.40—5.80 mm.

Colour:
General colour light tan. Crown and pronotum of male tan with pair of distinct sinuate longitudinal markings, female unmarked; elytra light yellowish tan.

Genitalia:
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.

Species Diagnosis

This is the only species of Friscanus that is a vector. DeLong and Severin (1949) illustrated the genitalia and Severin (1949) presented colored reproductions of the adults.

(Nielson 1968)

Ecology

Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Friscanus friscanus (Ball)

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Errhorominae
Friscanus friscanus (Ball)
References
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.
Record last updated - 12/09/2019