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Species Account


USNM; Male; Det. Nielson; 'Kaslo. B. C.'; Coll.: A N Caudell
i14117

USNM; Female; Det. Nielson; 'Pine Val’Y CAL.'; Coll.: E D Ball; Date: 7-6-31
i14118

USNM; Female; Det. Nielson; 'Pine Val’Y CAL.'; Coll.: E D Ball; Date: 7-6-31
i14119

USNM; Male; Det. Nielson; 'Kaslo. B. C.'; Coll.: A N Caudell
NMW Image No. i14117

Colladonus holmesi Bliven 1954a: 116

Membracoidea : Cicadellidae
Diseases Transmitted

Distribution Map
(simplified continental distribution)
Geographical Distribution:
North America

Recorded Distribution(s):
It occurs in the Western United States. Nielson (561) recorded it from several localities in California. I have col¬lected numerous specimens from Rock Creek Canyon near Twin Falls, Idaho. (Nielson, 1968)

Colladonus holmesi Bliven 1954a: 116
Diseases Transmitted Pathogen Type
Crops Affected by Colladonus holmesi Bliven 1954a: 116
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 of this virus under the name “Colladonus fiavocapitatus” by Severin (701, 703, 704). Transmission was effected from diseased celery to four healthy celery plants after adults fed 11 to 17 days on the inoculum.
(Nielson 1968)

At the present time, this species is not considered an important vector in the natural spread of this virus. In view of the confusion in identification of the species, further transmission experiments are recommended to confirm the identity of the proper vector species.

(Nielson 1968)

Identification Plates
Colladonus holmesi


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Plate 1
Species Description

Length:
Medium size, linear species. Length of male 4.7—5.4 mm., female 5.3—6.1 mm.

Colour:
General color yellow brown. Crown yellow brown, immaculate; pronotum and scutellum yellow brown; elytra light golden brown, translucent.
.

Genitalia:
Pygofer in lateral aspect about 1% times as long as wide, ventral margin slightly concave about middle, caudoventral margin produced posteriorly to distinct lobe, caudodorsal margin nearly straight, dorsal margin with distal part convex; pygofer spine well developed, long, straight, lanceolate, arising from apex of caudoventral lobe, projecting posterodorsally; caudodorsal submarginal area of pygofer with many long setae; style in dorsal aspect about 1½ times as long as connective; stylar shaft robust, short, about twice as long as wide, with sides parallel, apex truncate; stylar spine apical, long, attenuated apically, projecting laterally; aedeagus with bifurcate processes about one-half as long as aedeagal shaft, flat, narrow, attenuated apically, crossing in dorsal view; gonopore basad of midlength of shaft; female seventh sternum in ventral aspect about twice as wide as long, anterolateral margins parallel, posterolateral margins curved mesally, posterior margin truncate on each side of median spatulate process; median emargination U-shaped, deep, slightly less than one-half length of segment; spatulate process narrow, about twice as long as wide, produced slightly beyond posterior margin, with sides parallel, apex bifid.

Species Diagnosis

From fiavocapitatus, to which it is similar in general habitus, holmesi can be distinguished by the male pygofer with caudoventral margin produced posteriorly to a distinct lobe and the aedeagus with the gonopore basad of midlength of the shaft.

(Nielson 1968)

Ecology

Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Colladonus holmesi Bliven 1954a: 116

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Deltocephalinae
Colladonus holmesi Bliven 1954a: 116
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