Homalodisca insolita (Walker 1858b: 227)Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Homalodisca insolita (Walker 1858b: 227)|
This species is a vector of phony peach disease virus in Georgia. Transmission of this virus by this species was first reported by Turner and Pollard (793) in 1955 and subsequently confirmed in 1959 by these investigators (795). It was an efficient vector transmitting the virus to 42.2 percent of the test trees over an 8-year period. The acquisition feeding period was 3 days and the latent period in the vector 10-11 days.
This species was reported as a possible vector of Pierce’s disease virus of grape by Crall and Stover (US), but in view of confirmation studies by Kaloostian et al. from 1962 (408) it appears that insolita may not be a vector of this virus.
Jn spite of its high efficiency in transmitting the virus experimentally, insolita is not considered an important vector of phony peach owing to its restrictive habits to johnsongrass.
Large, slender species. Length of male 9.90—10.20 mm., female 10.80—11.0 mm.
General color brown to black. Crown and pronotum brown. to black with yellow or ivory spots, surface coarsely rugulose; elytra brown.
Pygofer in lateral aspect about 1½ times longer than wide, caudoventral margin folded mesally with small spine projecting from middle and extending cephalad; aedeagus in lateral aspect with pair of broad processes near base, shaft recurved, long, narrow, with numerous spines on lateral margins of apex, apex of shaft expanded laterally to form subapical lobes; gonopore on dorsal surface; style in dorsal aspect simple with small subapical spine; female seventh sternum in ventral aspect with caudal margin deeply and narrowly excavated.
This species, similar in general habitus to coagulata and liturata, can be separated from both species by the unique aedeagus and the caudal margin of the male pygofer, which is folded mesally and bears a distinct spine medially.
|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.|