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Effect of the Pea Aphid, Acyrthosiphon pisum (Harr.) (Homoptera: Aphididae), on Yields of Alfalfa Hay on Irrigated Land1

Published online by Cambridge University Press:  31 May 2012

G. A. Hobbs ,
N. D. Holmes ,
G. E. Swailes  and
N. S. Church
G. A. Hobbs
Affiliation:
Canada Agriculture Research Station, Lethbridge, Alberta
N. D. Holmes
Affiliation:
Canada Agriculture Research Station, Lethbridge, Alberta
G. E. Swailes
Affiliation:
Canada Agriculture Research Station, Lethbridge, Alberta
N. S. Church
Affiliation:
Canada Agriculture Research Station, Lethbridge, Alberta
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Extract

Although there are many reports on the control of the pea aphid and its effect on the yield of peas, few are available on the effect of the aphid on the yield of alfalfa hay, particularly on irrigated land. The experiments of Cook and App (1956) and Franklin (1953) were done under climatic and edaphic conditions different from those encountered in southern Alberta. Outbreaks of the aphid occur only occasionally in Alberta, but in 1957 it was very abundant in some irrigated alfalfa fields. This is a report on the effect of the aphid on yields of alfalfa hay in an irrigated area in southern Alberta.

Type
Articles
Information
The Canadian Entomologist , Volume 93 , Issue 9 , September 1961 , pp. 801 - 804
Copyright
Copyright © Entomological Society of Canada 1961

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References

Cook, W. C., and App, B. A.. 1956. The pea aphid on alfalfa and peas and its control. Agr. Chem. 11(8): 32–35.Google Scholar
Evans, W. G., and Gyrisco, G. G.. 1956. Notes on the biology of the pea aphid, J. Econ. Ent. 49: 878–879.CrossRefGoogle Scholar
Franklin, W. W. 1953. Insecticidal control plot tests for pea aphids in relation to alfalfa hay yields, J. Econ. Ent. 46: 462–467.Google Scholar