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EFFECTS OF SOME CONSTANT AND ALTERNATING TEMPERATURES ON POPULATION GROWTH OF THE PEA APHID, ACYRTHOSIPHON PISUM (HOMOPTERA: APHIDIDAE)

Published online by Cambridge University Press:  31 May 2012

W. H. Siddiqui ,
C. A. Barlow  and
P. A. Randolph
W. H. Siddiqui
Affiliation:
Department of Biology, Carleton University, Ottawa, Canada
C. A. Barlow
Affiliation:
Department of Biology, Carleton University, Ottawa, Canada
P. A. Randolph
Affiliation:
Department of Zoology, Indiana University, Bloomington, U.S.A.
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Abstract

Alternating temperatures resulted in higher intrinsic rates of increase (rm) than constant temperatures within the range of temperature favourable for growth and reproduction of the pea aphid. This difference was due to slightly faster development and earlier attainment of maximum fecundity at alternating temperatures.

Preliminary mathematical models relating rm to constant and alternating temperatures are derived. These are:

for constant temperatures and

for alternating temperatures of 5°, 10°, and 15° amplitudes respectively. Average deviation between empirical and computed values is 2%. The efficacy of these models is restricted to temperatures favourable for development and reproduction of the pea aphid.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 1 , January 1973 , pp. 145 - 156
Copyright
Copyright © Entomological Society of Canada 1973

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