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Species Account


USNM; Female; 'BRAZIL ; Foz do Iguaca Parana'; Coll.: Kruass; Date: vii-1961
i14237

USNM; Female; 'BRAZIL ; Foz do Iguaca Parana'; Coll.: Kruass; Date: vii-1961
i14238

USNM; Male; Det. C Musgrave; 'BR. HONDURAS; San Antonio'; Date: iv 1931
i14239

USNM; Female; 'BRAZIL ; Foz do Iguaca Parana'; Coll.: Kruass; Date: vii-1961
NMW Image No. i14237

Scaphytopius irroratus (van Duzee 1910a: 227 )

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

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

Recorded Distribution(s):
South western United States. (Nielson, 1968)

Scaphytopius irroratus (van Duzee 1910a: 227 )
Diseases Transmitted Pathogen Type
Western X-disease phytoplasma 16SrIII-A Phytoplasma
Crops Affected by Scaphytopius irroratus (van Duzee 1910a: 227 )
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. First reported as a vector by Severin (701) in 1947, the insect infected both celery and aster after completing nymphal development on diseased celery. Percent transmission to aster varied from 10 to 19, all infected by males. There were no transmissions by females. Retention of the virus was determined as 15 days in a single male. Attempts to transmit curly top virus of sugarbeets and Pierce’s disease virus of grape with this species failed.
(Nielson 1968)

This species is not considered an important vector in the spread of this virus in California.
(Nielson 1968)

Identification Plates
Scaphytopius irroratus


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Plate 1
Species Description

Length:
Small, linear Species. male 3.30—3.60 mm., female 3.50—3.80 mm.

Colour:
General colour light brown. Crown with brown longitudinal striations; pronotum reticulated; elytra with numerous brown reticulations interspersed with circular ivory spots.

Genitalia:
Pygofer in lateral aspect about 11/2 times as long as wide, caudodorsal margin produced posteriorly to convex lobe; aedeagus in lateral aspect with basal extension, shaft slightly curved, tubelike, with pair of terminal projections extending laterally in ventral aspect; gonopore apical; style in dorsal aspect simple, apex narrowed; female seventh sternum in ventral aspect with caudal margin broadly convex.

Species Diagnosis

This species is similar to delongi in general habitus and can easily be distinguished by the male genitalia, which lack the aedeagal paraphyses. This is the only species among vectors in the genus that lacks these structures.

(Nielson 1968)

Ecology

Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Scaphytopius irroratus (van Duzee 1910a: 227 )

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Deltocephalinae
Scaphytopius irroratus (van Duzee 1910a: 227 )
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