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Species Account


NMW.Z.1986.051; Female; 'Mt Palgonsan, Gyeongbug Pr. Korea'; Coll.: y. j. Kwon; Date: 9.x.1984
i14306

NMW.Z.1986.051; Female; 'Mt Palgonsan, Gyeongbug Pr. Korea'; Coll.: y. j. Kwon; Date: 9.x.1984
i14307

NMW.Z.1986.051; Female; 'Mt Palgonsan, Gyeongbug Pr. Korea'; Coll.: y. j. Kwon; Date: 9.x.1984
i14308

NMW.Z.1986.051; Female; 'Mt Palgonsan, Gyeongbug Pr. Korea'; Coll.: y. j. Kwon; Date: 9.x.1984
NMW Image No. i14306

Scleroracus flavopictus (Ishihara 1953a: 197 )

Membracoidea : Cicadellidae
Diseases Transmitted
Gentian witches' broom 16SrIII-B Phytoplasma
Potato purple top roll 16SrIII-B Phytoplasma
Tsuwabuki witches'-broom phytoplasma 16SrIII Phytoplasma

Distribution Map
(simplified continental distribution)
Geographical Distribution:

Recorded Distribution(s):
This species is known only from Japan. (Nielson, 1968)

Scleroracus flavopictus (Ishihara 1953a: 197 )
Diseases Transmitted Pathogen Type
Gentian witches' broom 16SrIII-B Phytoplasma
Potato purple top roll 16SrIII-B Phytoplasma
Tsuwabuki witches'-broom phytoplasma 16SrIII Phytoplasma
Crops Affected by Scleroracus flavopictus (Ishihara 1953a: 197 )
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 potato witches’ broom virus and Japanese aster yellows virus. In 1955, Fukushi et al. (301) were first to report transmission of witches’ broom virus in Japan. Leafhoppers were fed on diseased potato and red clover plants for 4 to 15 days, then transferred to healthy potato seedlings to feed from 2 to 48 days. Six of 23 potato plants were infected using diseased potato as the virus source, and 3 of 10 potato plants were likewise infected using diseased clover plants as the virus source. Natural transmission was also effected to Vicia unijuga A. Br., potato, red clover, alsike clover, and China-aster. The incubation period in the insect was not determined, but in plants it was long, ranging from 39—49 days to 98—102 days.
The transmission of Japanese aster yellows virus by this species was first reported by Fukushi and Nemoto in 1953
(298). In 1959, Yoshii (873) reported evidence that both viruses were distinct and listed additional host plants of witches’ broom virus.

(Nielson 1968)

This species is considered an important vector in the natural spread of these viruses in Japan.


(Nielson 1968)

Identification Plates
Scleroracus flavopictus


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Plate 1
Species Description

Length:
Small, slender species. Length of male 3.60—4.00 mm., female 4.00—4.30 mm.

Colour:
General color dark brown to black. Crown, and pronotum deep tan, heavily marked with black; elytra dark brown to black, veins tan.

Genitalia:
Pygofer in lateral aspect about 11/2 times as long as wide, caudoventral margin produced posteriorly to short truncate lobe, longitudinal suture along middle of caudoventral lobe; aedeagus in lateral aspect broad basally, shaft with pair of terminal tubelike processes, attenuated apically and slightly curved laterally, small spine on each side near middle of shaft in caudoventral aspect; gonopore terminal between bases of processes; style in dorsal aspect simple, apices narrowed; female seventh sternum in ventral aspect with caudal margin broadly sinuate (fig. 85).

Species Diagnosis

This species similar to vaccinii in genital characteristics can be separated by the aedeagus with a pair of long, tubular processes and a lateral spine on each side of the middle of each process. In 1953, Ishihara (385) originally described this species in the genus Omaniella, and then in 1954 he (387) transferred the species to Ophiola and synonymized Omaniella. Later he transferred it from Ophiola to Scleroracus.’ Most American and European authors consider Ophiola as a generic synonym of Scleroracus and I have elected to follow their works. Consequently, I have transferred flavopictus to Scleroracus.
(Nielson 1968)

Ecology

Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Scleroracus flavopictus (Ishihara 1953a: 197 )

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Deltocephalinae
Scleroracus flavopictus (Ishihara 1953a: 197 )
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