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Scaphytopius delongi Young 1952c: 248

Membracoidea : Cicadellidae
Diseases Transmitted
Western X-disease phytoplasma 16SrIII-A Phytoplasma

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

Recorded Distribution(s):
Only known from California. (Nielson, 1968)

Scaphytopius delongi Young 1952c: 248
Diseases Transmitted Pathogen Type
Western X-disease phytoplasma 16SrIII-A Phytoplasma
Crops Affected by Scaphytopius delongi Young 1952c: 248
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 the western strain of North American aster yellows virus. In 1947, Severin (701, 703) was first to report this species under the name of “Cloanthanus dubius (Van Duzee)” as a vector of this virus. Percent transmission from celery to celery obtained by males varied from 23 to 47. Thirteen percent of the population transmitted the virus. Retention of aster yellows virus varied from 1 to 29 days in single adults. No infections were obtained on aster plants nor did the species transmit curly top virus of sugarbeets.
(Nielson 1968)

This species is considered a vector of incidental importance in the natural spread of aster yellows virus in California.
(Nielson 1968)

Identification Plates
Scaphytopius delongi


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Plate 1
Species Description

Length:
Medium size, slender species. Length of male 4.70—4.90 mm.

Colour:
General colour dark brown. Crown light brown with dark-brown longitudinal striations; pronotum dark brown; elytra dark brown with circular ivory spots.

Genitalia:
Pygofer in lateral aspect about 11/3 times as long as wide, caudodorsal margin produced posteriorly to convex lobe; aedeagus in lateral aspect long, tubelike, slightly expanded near apex; gonopore apical; paraphyses crossing over twice, broad subapically; style in dorsal aspect with apices narrowed; female seventh sternum in ventral aspect with caudal margin broadly convex.

Species Diagnosis

From acutus, to which it is similar in genital characteristics, delongi can be distinguished by the twice-crossed aedeagal paraphyses. This species is closely related to certain western forms of acutus that sometimes have twice-crossed paraphyses.

(Nielson 1968)

Ecology

Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Scaphytopius delongi Young 1952c: 248

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Deltocephalinae
Scaphytopius delongi Young 1952c: 248
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 - 25/09/2019