Texananus latiplex DeLong 1943c: 124Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Texananus latiplex DeLong 1943c: 124|
This species is a vector of the western strain of North American aster yellows virus. It was first reported a vector of this virus by Severin in 1945 (696). Transmission was effected to 18 of 100 celery plants by males and to 32 of 100 plants by females after the insects had been reared on diseased celery. The species also transmitted the virus to 18 of 248 aster plants after daily transfers and to 2 of 30 plants after weekly transfers. The period of exposure on diseased plants affected percentage of transmission; i.e., the longer the period, the higher the percentage of infection. Increased numbers of insects also resulted in increased infection. There was evidence that individual leaf-hoppers transmitted the virus only once, then lost their ability to transmit. The minimum latent period of the virus in the insect was 8 days and the maximum 33 days. The virus was retained from 1 to 42 days. Attempts to transmit curly top virus of sugar-beets and Pierce’s disease virus of grape were not successful.
This species is not considered an important vector in the natural spread of this virus in California, because it is not directly associated with celery fields.
Medium size, robust species. Length of male 4.90—5.20 mm., female 5.00—5.60 mm.
General colour tan. Crown and pronotum tan with few very light-brown markings; elytra tannish to ivory with numerous light-brown reticulations.
Pygofer in lateral aspect about 11/3 times as long as wide, caudal margin acutely angled, narrowly produced at middle; aedeagus in lateral aspect curved, broad basally, abruptly constricted apically; apical process of connective long, single, extending beyond apex of aedeagal shaft; style in dorsal aspect narrowed apically; female seventh sternum in ventral aspect with caudal margin slightly concave, notched at middle.
This species is closely related to
in genital characteristics and can be separated by the aedeagus with a broader shaft, which is bifid apically, and the style, which is pointed apically. The genitalia were figured by DeLong and Severin (1945)
and Crowder (1952)
Colored illustrations of the nymphs and adults were made by Severin in 1945.
|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.|