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Patterns of parasitism by Trybliographa rapae , a cynipid parasitoid of the cabbage root fly, under laboratory and field conditions
Author(s) -
JONES T. H.,
HASSELL M. P.
Publication year - 1988
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/j.1365-2311.1988.tb00361.x
Subject(s) - parasitoid , parasitism , biology , host (biology) , population density , ecology , population , botany , demography , sociology
.1 The spatial patterns of parasitism of the cabbage root fly caused by the cynipid parasitoid Trybliographa rapae (Westw.) have been studied in a laboratory system, within field cages and in a natural situation. 2 Continuous observations during the laboratory experiments showed the parasitoids to spend proportionately more time on the patches of high host density. This resulted in the per cent parasitism per patch being directly density dependent. 3 Similar patterns of parasitism were found from the field cage system, and also from experiments using the natural parasitoid population and either manipulated or natural host densities. 4 While mutual interference was marked in the laboratory experiments, there was little or no sign of it within the larger field cages.