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EFFECTS OF INBREEDING ON CLOSED POPULATIONS OF PREDACEOUS MITES (ACARINA: PHYTOSEIIDAE)1

Published online by Cambridge University Press:  31 May 2012

S. L. Poe  and
W. R. Enns
S. L. Poe
Affiliation:
Institute of Food and Agricultural Sciences, University of Florida, Bradenton
W. R. Enns
Affiliation:
Department of Entomology, University of Missouri, Columbia
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Abstract

Populations of Neoseiulus fallacis (Garman) and Phytoseiulus persimilis Athias-Henriot, predators of Tetranychus urticae Koch, were reared under homogeneous environmental conditions by inbreeding without introducing new germ plasm.Mites from 1-year-old inbred cultures had high mortality in all stadia and generally lower viability. Oviposition was reduced and a high percentage of eggs failed to hatch. Further inbreeding resulted in the production of only sterile female mites. These data cast serious doubt on the possibility of genetically improving populations of predaceous mites with only limited germ plasm resources.

Type
Articles
Information
The Canadian Entomologist , Volume 102 , Issue 10 , October 1970 , pp. 1222 - 1229
Copyright
Copyright © Entomological Society of Canada 1970

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