Texananus spatulatus (van Duzee 1892a: 126 )Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Texananus spatulatus (van Duzee 1892a: 126 )|
This species is a vector of the western strain of North American aster yellows virus. It was first reported as a vector in 1945 by Severin (696), who demonstrated a series of experimental transmissions of the virus by adults as well as third-and fourth-instar nymphs from diseased celery to healthy celery. Single male and female leafhoppers after feeding on diseased celery transmitted to 34 of 100 and 29 of 100 healthy plants, respectively. Varying numbers of individuals also transmitted the virus from 29 to 88 percent of the plants. In transmission studies using aster only a small percentage of infections resulted either to or from aster. The minimum latent period of the virus in the insect feeding on celery was 6 days and maximum 35 days. Males retained the virus for 84 days and females 99 days. Attempts to transmit curly top virus of sugarbeets and Pierce’s disease virus of grape were not successful.
This species has potential importance as a vector of this virus owing to its ability to retain the virus for long periods and to transmit it to a high percentage of celery plants.
Medium size, robust species. male 6.30—6.70 mm., female 7.20—7.60 mm.
General colour light brown with numerous reticulations on body. Crown and pronotum tan, suffused with light-brown reticulations; elytra tan or ivory with numerous brown reticulations.
Pygofer in lateral aspect about 1½ times as long as wide, caudal margin truncate; aedeagus in lateral aspect broad basally, attenuated apically; gonopore terminal; connective with paired apical processes extending beyond apex of aedeagal shaft; style in dorsal aspect simple, apex short; female seventh sternum in ventral aspect with caudal margin distinctly notched at middle.
to which it is similar in genital characteristics,
can be separated by the extremely long paired ventral processes of the aedeagus. Additional illustrations of the genitalia were provided by DeLong and Severin (1945) and Crowder (1952)
Colored plates of the adults were presented by Severin (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.|