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POPULATION INCREASE OF THE CABBAGE APHID, BREVICORYNE BRASSICAE, ON DIFFERENT HOST PLANTS1

Published online by Cambridge University Press:  31 May 2012

Richard B. Root
Affiliation:
Department of Entomology and Limnology, Cornell University, Ithaca, N.Y.
Ann M. Olson
Affiliation:
Department of Entomology and Limnology, Cornell University, Ithaca, N.Y.

Abstract

Longevity and fecundity data are presented for cohorts of cabbage aphid, Brevicoryne brassicae (L.), reared on different hosts (Barbarea vulgaris, Brassica pekinensis, and two varieties of Brassica oleracea) and under constant and fluctuating environmental conditions. Changes in fecundity and development were the chief causes for the different rates of population increase (r) observed on each host. Alate forms developed only in the cohort reared on B. vulgaris, the most resistant host studied. Host factors, acting during the late prenatal period or during postnatal development, appear to be capable of influencing form determination in this aphid.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1969

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