Scaphytopius magdalensis (Provancher 1889a: 275 )Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Blueberry stunt phytoplasma 16SrI-E (BBS3)||Phytoplasma|
|Crops Affected by Scaphytopius magdalensis (Provancher 1889a: 275 )|
This species is a vector of blueberry stunt virus in the Northeastern United States. The first report of its transmission by a leafhopper was made by Tomlinson et al. (790) in 1950. Two species, Scaphytopius magdalensis and S. verecundus, were both reported as vectors, but later workers (Hutchinson 1955 ; Maramorosch in 1955 ) proved that magdalensis was the only vector. In the earlier tests by Tomlinson et al. in 1950 (790), three of four test plants developed the disease after a mixed population of both species were prefed on inoculum and transferred to healthy plants. The test was repeated using mixed colonies, and 14 of 143 test plants developed the disease. There was no information on the latent period of the virus or other details involving virus-vector relationships.
Hutchinson in 1955 (381) and Maramorosch also in 1955 (478) confirmed transmission by magdalensis. The former investigator obtained transmission with a single male of magdalensis whereas in 40 tests over a 3-year period with verecundus, no transmissions were effected. The latter worker conducted similar experiments and obtained the same results.
This species is considered an important vector in the natural spread of blueberry stunt virus. There is an obvious need for further study to determine the virus-vector relationship of this virus and to ascertain the relationship with other viruses transmitted by other species of Scaphytopius.
Small, linear species. Length of male 3.80—4.30 mm., female 4.20—4.30 mm.
General color dark brown. Crown with brown longitudinal striations; pronotum with brown reticulations; elytra with dark-brown reticulations and few ivory spots.
Pygofer in lateral aspect about twice as long as wide, caudal margin somewhat truncate; aedeagus in lateral aspect simple, tubelike, slightly constricted about middle in ventral aspect; gonopore terminal; aedeagal paraphyses broad apically with median tooth on lateral margin, crossing over once; style in dorsal aspect simple, apices narrowed; female seventh sternum in ventral aspect with caudal margin narrowly convex.
to which it is similar,
can be separated by the short lateral process near the middle of each aedeagal paraphysis.
|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.|