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Gall Aphids on Poplar in Alberta II. Periods of Emergence from Galls, Reproductive Capacities, and Predators of Aphids in Galls1

Published online by Cambridge University Press:  31 May 2012

A. M. Harper
A. M. Harper
Affiliation:
Canada Agriculture Research Station, Lethbridge, Alberta
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Extract

In southern Alberta there are several species of aphids that produce galls on poplar trees (Harper, 1959). These aphids are all in the subfamily Eriosomatinae and in the genera Pemphigus Hartig, Thecabius Koch, and Mordwilkoja Del. G. Two of the species are of economic importance, Pemphigus betae Doane, a pest of sugar beets in Alberta and parts of United States (Harper, 1957; Maxson, 1916; Parker, 1915), and Pemphigus populitransversus Riley, a serious pest of crucifers in Texas (Wene and White, 1953). Both species overwinter on poplar as eggs. In spring the fundatrix emerges from the egg and feeds on the poplar leaf, initiating a gall in which the winged fundatrigeniae are produced. During the summer the fundatrigeniae migrate to the secondary host where they produce the wingless alienicolae; in the fall these in turn produce the winged sexuparae, which migrate to the poplars where they produce the wingless sexuales. The female sexuales, after mating, deposit eggs on the poplars to complete the life cycle (Harper, 1957; Jones and Gillette, 1918; Parker, 1914).

Type
Articles
Information
The Canadian Entomologist , Volume 91 , Issue 11 , November 1959 , pp. 680 - 685
Copyright
Copyright © Entomological Society of Canada 1959

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References

Duncan, D. B. 1955. Multiple range and Multiple F tests. Biometrics 11(1): 1–42.CrossRefGoogle Scholar
Fisher, R. A., and Yates, F.. 1953. Statistical tables for biological, agricultural and medical research. Oliver and Boyd. London.Google Scholar
Harper, A. M. 1957. The sugar-beet root aphid, Pemphigus betae Doane, with notes on closely related aphids of southern Alberta. Ph. D. thesis. State College of Washington.Google Scholar
Harper, A. M. 1959. Gall aphids of popl.ar in Alberta I. Descriptions of galls and distributions of aphids. Can. Ent. 9: 489–496.CrossRefGoogle Scholar
Jones, T. H., and Gillette, C. P.. 1918. Life history of Pemphigus populi-transversus Riley. J. Agr. Res. 14: 577–594.Google Scholar
Maxson, A. C. 1916. Some factors influencing distribution of Pemphigus betae in beet fields. J. Econ. Ent. 11: 231–236.CrossRefGoogle Scholar
Parker, J. R. 1914. The life history of the sugar-beet root louse (Pemphigus betae Doane). J. Econ. Ent. 7: 136–141.CrossRefGoogle Scholar
Parker, J. R. 1915. Influence of soil moisture upon rate of increase in sugar-beet root louse colonies, J. Agr. Res. 4: 241–250.Google Scholar
Wene, G. P., and White, A. N.. 1953. The cabbage-root aphid. Ohio J. Sci. 53: 332–334.Google Scholar