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REPRODUCTION AND POPULATION GROWTH OF THE PEA APHID (HOMOPTERA: APHIDIDAE) UNDER LABORATORY AND FIELD CONDITIONS

Published online by Cambridge University Press:  31 May 2012

A. Campbell  and
M. Mackauer
A. Campbell
Affiliation:
Pestology Centre, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia
M. Mackauer
Affiliation:
Pestology Centre, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia
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Abstract

The effect of temperature on the age-specific fecundity and the survival of apterous and alate virginoparous pea aphid, Acyrthosiphon pisum (Harris), from Kamloops, B.C., was measured. Demographic statistics were estimated for 10.3°, 14.8°, 19.7°, 26.1°, and 27.8°C constant and for fluctuating field temperatures. On a 24-h-day time-scale, temperature and longevity were inversely related in both morphs; total fecundity was highest at average and low constant temperatures. On a physiological time-scale, the intrinsic rate of increase (rm) was insensitive to changes in constant temperature in the range between 10° and 20°C; temperatures above 25°C were detrimental to aphid population growth and survival. Alate virginoparae generally had a longer pre-reproductive period and achieved a lower mean total fecundity than apterae maintained under identical conditions. The usefulness of laboratory measurements for the prediction of population growth under variable field temperatures is discussed. Differences in the reproductive patterns of alate and apterous pea aphids are considered in the context of the r- and K-hypothesis of selection.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 2 , February 1977 , pp. 277 - 284
Copyright
Copyright © Entomological Society of Canada 1977

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