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COLD-HARDINESS OF 1-, 2-, AND 3-YEAR-OLD ALFALFA INFESTED WITH THE PEA APHID (HOMOPTERA: APHIDIDAE)

Published online by Cambridge University Press:  31 May 2012

A. M. Harper  and
S. Freyman
A. M. Harper
Affiliation:
Research Station, Agriculture Canada, Lethbridge, Alberta T1J 4B1
S. Freyman
Affiliation:
Research Station, Agriculture Canada, Lethbridge, Alberta T1J 4B1
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Extract

The pea aphid, Acyrthosiphon pisurn (Harris), is a serious pest of alfalfa (Medicago sativa L.) and is known to reduce the cold-hardiness of seedling alfalfa (Harper and Freyman 1979). To determine whether or not pea aphids also reduce cold-hardiness in older alfalfa, plants were grown in the field for 1, 2, or 3 years, then tested for cold-hardiness under controlled conditions of infestation, hardening, and freezing.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 9 , September 1983 , pp. 1243 - 1244
Copyright
Copyright © Entomological Society of Canada 1983

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References

Harper, A. M. and Freyman, S.. 1979. Effect of the pea aphid, Acyrthosiphon pisum (Homoptera: Aphididae), on cold-hardiness of alfalfa. Can. Ent. 111: 635–636.CrossRefGoogle Scholar
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