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THE RISE AND DECLINE OF A LOCAL POPULATION OF THE APHID APHIS BARBERAE (HOMOPTERA: APHIDIDAE)1

Published online by Cambridge University Press:  31 May 2012

Robert J. Lamb
Robert J. Lamb
Affiliation:
Agriculture Canada, Research Station, Winnipeg, Manitoba R3T 2M9
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Abstract

The rise and decline of two infestations of Aphis barberae Robinson on the thistle Cirsium arvense (L.) Scop, are described. The larger infestation consisted of 122 colonies in an area 8 m in diameter and produced many alatae before declining. The second infestation consisted of 12 colonies and produced no alatae. Each infestation appeared to arise from a single central colony and spread when alate and apterous aphids travelled short distances to adjacent plants. The growth patterns indicate that each infestation represented a single clone. Both infestations declined rapidly due largely to predation and became locally extinct early in the summer.

Type
Articles
Information
The Canadian Entomologist , Volume 112 , Issue 12 , 01 December 1980 , pp. 1285 - 1289
Copyright
Copyright © Entomological Society of Canada 1980

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References

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