Species Account

NMW Image No.

Pagaronia triunata Ball

Membracoidea : Cicadellidae
Diseases Transmitted

Distribution Map
(simplified continental distribution)
Geographical Distribution:
North America

Recorded Distribution(s):
It is known only from California. Oman (1938) recorded it from the coastal hills near San Francisco in Santa Clara County, Santa Cruz Mountains, Salinas, Alameda, and Honda. Additional localities were Atherton, San Mateo County (DeLong and Severin (1949) and Blocksburg, Humboldt County (Bliven 1958). (Nielson,1968)

Pagaronia triunata Ball
Diseases Transmitted Pathogen Type
Crops Affected by Pagaronia triunata 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 from diseased alfalfa to healthy alfalfa was obtained in 3 out of 10 plants tested. In 1949, Severin (706) confirmed transmission of the virus and was able to get infections from diseased grape and alfalfa to healthy grape.
(Nielson 1968)

This species is not regarded as an important vector in the natural spread of Pierce’s disease virus of grape owing to its lack of association with grape vineyards, inability to survive adequately on grape and alfalfa, and low efficiency in transmitting the virus:
(Nielson 1968)

Identification Plates
Pagaronia triunata

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Plate 1
Species Description

Large, slender species. male 7.50—8.00 mm., female 8.20—9.00 mm.

General color light brown. Crown tan with black spots or markings; pronotum tan with transverse spots; elytra brown, veins ivory or white.

Pygofer in lateral aspect about as long as wide, caudoventral margin with distinct elongate spine projecting caudodorsally, caudodorsal margin with very short, toothed spine projecting caudad; aedeagus in lateral aspect broadly concave on median, ventral margin, grooved at apical half in ventral aspect; gonopore subterminal; style in dorsal aspect with apex narrow and curved laterally; female seventh sternum in ventral aspect with caudal margin truncate and slightly notched at middle.

Species Diagnosis

This species, related to tredecimpunctata, can be separated by the aedeagus, which lacks aedeagal processes on the shaft, and the male pygofer with a long spine arising from the caudoventral margin and a short spine on the caudodorsal margin. DeLong and Severin ( 1949) illustrated the genitalia and Severin in (1949) gave coloured illustrations of the adults.

(Nielson 1968)


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

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Errhorominae
Pagaronia triunata Ball
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 - 25/09/2019