Macrosteles quadripunctulatus (Kirschbaum 1868b: 99 )Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Kok-saghyz yellows 16Sr||Phytoplasma|
|Crops Affected by Macrosteles quadripunctulatus (Kirschbaum 1868b: 99 )|
This species is a vector of European aster yellows virus in Russia, It was first reported a vector of a virus disease called yellows of “Kok-saghyz” by Sukhov and Vovk in 1945 (777), who reported transmission of the virus to this plant and to dandelion and tomatoes. Percent transmission varied from 40 to 69.3 on test plants after the leafhoppers were previously fed on diseased plants. Transmission was also obtained by leafhoppers “spontaneously infected,” which presumably referred to naturally infective insects, on 10 percent of the test plants.
This species is considered an important vector in the natural spread of yellows of “Kok-saghyz” in Russia. The relationship of this virus with aster yellows in the United States, Europe, and Australia is uncertain.
Small, linear species. Length of male 2.70—3.10 mm., female 3.00—3.40 mm.
Male abdomen: 2nd tergite with trunk widely V-shaped, broad shallowly produced ventrally; neck short, about 1./3 as long as trunk. width. 2nd tergal apodeme slightly exceeding middle of tergite posteriorly. 1st sternal apodeme with posterior lobes about as long as wide, more or less remote basally. 2nd sternal apodeme with posterior lobes about 1.8 to twice as long as basal. width; apophysis processes elongately produced.
General color light yellow. Crown light yellow with two black spots on anterior margin and two black spots on disk; pronotum yellow; scutellum yellow with two triangular black spots; elytra translucent with irregular suffused patches of ivory and brown.
Pygofer in lateral aspect slightly longer than wide, caudoventral margin with small process; aedeagus in lateral aspect narrow, shaft tubelike with pair of terminal processes, each process with lateral secondary process arising from middle; gonopore terminal; style in dorsal aspect simple, apex narrowed and slightly curved laterally; female seventh sternum in ventral aspect with caudal margin distinctly truncate (fig. 57).
This species is similar in general habitus to all other vector species of the genus and it can easily be distinguished from them by the unique aedeagus with a secondary process arising laterally from the middle of each terminal process.
This species, referred to as “quadripunctata Kbm.” by Sukhov and Vovk in 1945 (777), was a probable typographical error and was corrected as quadripunetulatus by Oman in 1949 (588).
|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.|