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RESPONSES AND COMPETITION OF THE PARASITOIDS SPALANGIA ENDIUS AND MUSCIDIFURAX RAPTOR (HYMENOPTERA: PTEROMALIDAE) AT DIFFERENT DENSITIES OF HOUSE FLY PUPAE1

Published online by Cambridge University Press:  31 May 2012

J. R. Ables  and
M. Shepard
J. R. Ables
Affiliation:
Department of Entomology and Economic Zoology, Clemson University, Clemson, South Carolina
M. Shepard
Affiliation:
Department of Entomology and Economic Zoology, Clemson University, Clemson, South Carolina
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Abstract

The functional response of Spalangia endius Walker was described by a linear relationship between attack rate and density of house fly pupae. S. endius searched well at higher host densities and in 72 h, appeared capable of attacking more than 80 pupae per female under laboratory conditions. The response of Muscidifurax raptor G. & S. was quadratic as poor searching ability limited this parasitoid’s attack rate at high host densities. Individual parasitoid efficiency of both species was reduced by intraspecific competition when parasitoid density was increased.

Type
Articles
Information
The Canadian Entomologist , Volume 106 , Issue 8 , August 1974 , pp. 825 - 830
Copyright
Copyright © Entomological Society of Canada 1974

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