Synonyms and other taxonomic changes
Rodolia cardinalis (Mulsant)
Orig. Comb: Vedalia cardinalis Mulsant
Explanation of Names
'Vedalia Beetle' refers to original genus. Cardinalis probably refers to the bright red color, similar to the red robes of Catholic cardinals.
(Coquillett) was also introduced into California from Australia in 1891, but does not exist there now, although it was thought to have been established for some time. (1)
Life cycle photos
- Natural History of Orange Co., University of California
se. US to CA / Mex. - Map (1)
Type locality: New Holland (1)
Acacia, boxwood, citrus, magnolia, Nandina, olive, Pittosporum, and rose - all species attacked by cottony cushion scale. - Cornell University
There are 8 generations per year in the cooler coastal areas of California, and 12 generations per year in the hot, dry inland areas. - Cornell University
is host specific to cottony cushion scale. Adults and mature larvae feed on all scale stages; young feed on eggs. - Cornell University
A female will lay from 150-190 eggs during her lifetime. - Cornell University
The vedalia beetle, Rodolia cardinalis, is the most famous introduced beneficial insect in history. (1)
Introduced from Australia to control Cottony Cushion Scale - Icerya purchasi
Over the winter of 1888-1889 a lady beetle called vedalia beetle was introduced into California from Australia to combat cottony cushion scale, Icerya purchasi - also an introduced species. Cottony cushion scale was causing infestations so severe in California citrus groves that growers were pulling out their trees and burning them. Orchard values were plummeting. Yet, by the fall of 1889, the pest was completely controlled in the areas of introduction. The vedalia beetle literally saved the California citrus industry, and since the California success, it has been exported to many other parts of the world, often with equally successful results.
The introduction of the vedalia beetle is considered to be the beginning of classical biological control. - Cornell University
This species proved to be an immediate and spectacular success, and this success precipitated a wave of coccinellid introductions ... Available records show that 179 species have been intentionally imported into North America; 8 species have become established through accidental introductions, 5 of these had been intentionally introduced but did not become established where released. A total of 26 species of foreign Coccinellidae are now definitely or possibly established in North America, 16 of these resulting from intentional releases. (1)
(Wickham) - AZ-TX, UT - Gordon's figures (1)
can usually be distinguished from A. virginalis
by body form. Anovia virginalis
is definitely widest just posterior to the humeral callus; R. cardinalis
is widest at the middle of the elytra. (1)
Caltagirone, L.E. and Doutt, R.L. 1989. The history of the vedalia beetle importation to California and its impact on the development of biological control. Annual Review of Entomology 34: 1-16.
DeBach, P. (Ed.) 1964. Biological control of insect pests and weeds. Chapman and Hall, London. xxiv + 844 pp. (3)
Doutt, R.L. 1958. Vice, virtue and the vedalia. Bulletin of the Entomological Society of America 4: 119–123.
Gordon, R.D. 1972. The tribe Noviini of the New World (Coleoptera: Coccinellidae). Journal of the Washington Academy of Sciences 62: 23-31.
Howard, L.O. 1925. Albert Koebele: an obituary. Journal of Economic Entomology, 18(3): 556-562.
Mulsant, M.E. 1850. Species de Coleopteres trimeres securipalpes. Ann. Sci. Phys. Nat. Lyon 2: 1-1104. (p.906
University of California
- Natural History of Orange County, California