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Species Account


USNM; Female; Det. Nielson; 'San Diego. Cal.'; Date: 7.5.31
i14128

USNM; Female; Det. Nielson; 'San Margareta Cal.'
i14129

USNM; Female; Det. Nielson; 'San Margareta Cal.'
i14130

USNM; Female; Det. Nielson; 'San Diego. Cal.'; Date: 7.5.31
NMW Image No. i14128

Colladonus kirkaldyi (Ball 1911a: 197 )

Membracoidea : Cicadellidae
Diseases Transmitted

Distribution Map
(simplified continental distribution)
Geographical Distribution:

Recorded Distribution(s):
It occurs in northern Mexico and California. De¬Long and Severin (196) collected specimens from San Mateo
County. Specimens were examined from Tijuana, Mexico, and Del
Mar, La Jolla, La Mesa, Lucerne, Miramar, Montara, Salinas, San
Diego, San Francisco, Santa Cruz, Santa Margarita, Stinson
Beach, and Watsonville, Calif., by Nielson
(561).
(Nielson, 1968)

Colladonus kirkaldyi (Ball 1911a: 197 )
Diseases Transmitted Pathogen Type
Crops Affected by Colladonus kirkaldyi (Ball 1911a: 197 )
Rice Citrus Carrot
Barley Apple Tomato
Maize (Corn) Pear Potato
Sugarcane Elm Strawberry
Wheat Palms Rubus
Sorghum Grapevine Papaya
Other (grasses/cereals) Ornamentals Peach

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.
(Nielson 1968)

This species at present is not considered an important vector of this virus in California.


(Nielson 1968)

Identification Plates
Colladonus kirkaldyi


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Plate 1
Species Description

Length:
Small, slightly robust species. Length of male 3.50—3.70 mm., female 3.70—4.00 mm.

Colour:
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.

Genitalia:
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 Diagnosis

This species is rather distinctive in general habitus and male genital characteristics from all other vector species of Colladonus. 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 (561) presented further elucidations of the genitalia and Severin (704) illustrated the adults in color.

(Nielson 1968)

Ecology

Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Colladonus kirkaldyi (Ball 1911a: 197 )

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Deltocephalinae
Colladonus kirkaldyi (Ball 1911a: 197 )
References
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.
Record last updated - 12/09/2019