Colladonus kirkaldyi (Ball 1911a: 197 )Membracoidea : Cicadellidae
|Diseases Transmitted||Pathogen Type|
|Crops Affected by Colladonus kirkaldyi (Ball 1911a: 197 )|
This species is a vector of the western strain of North American aster yellows virus. It was first reported as a vector by Severin (701, 703, 740) under the name of “Idiodonus kinlcaldyi (Ball) .“ It was not an efficient vector of the virus as evidenced by the number of failures in transmitting the virus. Only two of seven celery plants tested became infected after the insects fed for 66 days on diseased celery.
This species at present is not considered an important vector of this virus in California.
Small, slightly robust species. Length of male 3.50—3.70 mm., female 3.70—4.00 mm.
General colour light grey. Crown grey to light brown with two black spots on anterior margin and black spot next to inner margin of each eye, two small brown spots along posterior margin; pronotum grey to light brown, sometimes with few spots along anterior border; elytra streaked with grey and brown, veins grey.
Pygofer in lateral aspect about 1½ times as long as wide, ventral margin concave about middle, caudal margin triangularly convex, dorsal margin with distal part convex; pygofer spine with many minute setae; caudodorsal and dorsal submarginal areas with many long setae; aedeagus in lateral aspect with bifurcate processes more than one-half as long as aedeagal shaft, flat, narrow throughout, pointed apically, crossing in dorsal aspect; gonopore of aedeagus basad of midlength of shaft; style in dorsal aspect about 1½ times as long as connective; stylar shaft robust, about twice as long as basal width, sides not parallel, expanded apically; stylar spine apical, sharply pointed, projecting laterally; female seventh sternum in ventral aspect slightly more than twice as wide as long, lateral margins parallel, posterior margin acutely convex on each side of median spatulate process; median emargination V-shaped, shallow, less than one-half length of segment; spatulate process short, slightly longer than wide, produced slightly beyond posterior marginal extremity, with sides parallel, apex truncate.
species is rather distinctive in general habitus and male genital characteristics from all other vector species of
The pygofer spine is short and curved and arises from the middle of the caudal margin of the pygofer and separates it from other species. Nielson
presented further elucidations of the genitalia and Severin
illustrated the adults in color.
|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.|