Pagaronia triunata BallMembracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Pagaronia triunata 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 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.
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:
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.
This species, related to
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 (
illustrated the genitalia and Severin in (1949)
gave coloured illustrations 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.|