Species Account

NCSU; Female; 'La Jolla, Calif.'

NCSU; Male; 'Cedrros Id, Lower Cal.'

NCSU; Female; 'La Jolla, Calif.'
NMW Image No. E002082

Neokolla severini DeLong 1948c: 142

Membracoidea : Cicadellidae
Diseases Transmitted

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

Recorded Distribution(s):
United States, Mexico (Baja Cal.). It is known only from California and Arizona. I have collected numerous specimens from Seven Springs, Ariz. (Nielson, 1968)

Neokolla severini DeLong 1948c: 142
Diseases Transmitted Pathogen Type
Crops Affected by Neokolla severini DeLong 1948c: 142
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 by Frazier (273) in 1944 under the name of “gothica” as a vector of this virus. Later, in 1946, Frazier and Freitag (275) confirmed transmission. Forty-nine percent of plants tested became diseased. Transmission was effected from diseased grape and alfalfa to healthy grape and alfalfa. In 1949, Severin (706) successfully obtained transmission with single insects of either sex. However, in 1954 Freitag and Frazier (286) were not able to find naturally infective specimens.
(Nielson 1968)

This species is not considered an important Vector of Pierce’s disease virus of grape.
(Nielson 1968)

Identification Plates
Neokolla severini

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Plate 1
Species Description

Medium size, slender species. male 4.50—4.90 mm., female 4.90—5.10 mm.

General colour dark brown. Crown tannish brown with numerous dark-brown markings on disk; pronotum with light-brown band along anterior and lateral margins, deep-brown band posteriorly; elytra dark brown with green band along commissure and bluish spots scattered along claval suture.

Pygofer in lateral aspect about twice as long as wide, dorsal margin with recurved spine, projecting ventrally, caudal margin narrowly convex, ventral margin folded mesally; aedeagus in lateral aspect with shaft narrow, elongate, and constricted medially, basal process on each side of aedeagal shaft in dorsal aspect; gonopore large, terminal, apex bifid; style in dorsal aspect simple; female seventh sternum in ventral aspect with caudal margin narrowly convex.

Species Diagnosis

This is the only species in the genus Neokolla that is a vector. The genitalia were figured by DeLong and Severin (1949) and the adult was illustrated by Severin (1949) .
(Nielson 1968)


Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Neokolla severini DeLong 1948c: 142

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Cicadellinae
Neokolla severini DeLong 1948c: 142
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