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Research into the biology and host-specificity of Teretriosoma nigrescens, a potential natural antagonist of Prostephanus truncatus

110 pages

Table of contents

Maja Pöschko

Eschborn 1994

Published by:
Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) GmbH, OE 423-2
Postfach 5180, D-65726 Eschborn, Germany

Project "Biological integrated control of the Larger Grain Borer"

Translation: A. Kathryn Tolson
Layout: Maja Pöschko, Claudia Herok, Christiane Jansen
Printed by: TZ Verlagsgesellschaft mbH
Distribution: TZ Verlagsgesellschaft mbH, Bruchwiesenweg 19, D-64380 Rossdorf


Printed in Germany
© 1995 GTZ

The copyright of this publication is vested in the “Deutsche Gesellschaft fuer Technische Zusammenarbeit (GTZ) GmbH”. Applications for permissions to reproduce this publication, in whole or in part, by any method or process, should be addressed, with a statement of purpose and extend of the reproduction desired, to GTZ - Stabsstelle 01, Postfach 5180, D-65726 Eschborn, Germany



1 Introduction and description of the problem

2 Literature survey

2.1 The pest Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae)
2.1.1 The spread of Prostephanus truncatus
2.1.2 Damage and losses caused by Prostephanus truncatus in Africa
2.1.3 Ways of controlling Prostephanus truncatus by chemical means
2.1.4 Ways of controlling Prostephanus truncatus biologically

2.2 The predator Teretriosoma nigrescens Lewis (Coleoptera: Histeridae)

2.2.1. The morphology, biology and ecology of Teretriosoma nigrescens
2.2.2 Biological control of Prostephanus truncatus using Teretriosoma nigrescens

3 Increase in Teretriosoma nigrescens with Prostephanus truncatus as the host

3.1 Breeding Prostephanus truncatus and Teretriosoma nigrescens
3.1.1 Breeding Prostephanus truncatus
3.1.2 Breeding Teretriosoma nigrescens

3.2 Population dynamics of Teretriosoma nigrescens

3.2.1 Introduction
3.2.2 Material and method
3.2.3 Results
3.2.4 Conclusion

3.3 The ability of Teretriosoma nigrescens to reproduce in cultures of Prostephanus truncatus on various substrates

3.3.1 Introduction
3.3.2 Material and methods
3.3.3 Results
3.3.4 Conclusion

3.4 The ability of Teretriosoma nigrescens to reproduce on Prostephanus truncatus populations after several months on plant substrate

3.4.1 Introduction
3.4.2 Material and method
3.4.3 Results
3.4.4 Conclusion

4 Host specificity of the predator Teretriosoma nigrescens

4.1 Host specificity of Teretriosoma nigrescens within Coleoptera storage pests
4.1.1 Introduction
4.1.2 Material and methods
4.1.3 Results
4.1.4 Conclusion

4.2 Host specificity of Teretriosoma nigrescens among species of Lepidoptera storage pests

4.2.1 Introduction
4.2.2 Method
4.2.3 Results and Conclusion

5 The significance of plant substrate for the nourishment and reproduction of Teretriosoma nigrescens

5.1 Introduction
5.2 The ability of Teretriosoma nigrescens to survive on plant substrates
5.2.1 Material and method
5.2.2 Results

5.3 Damage and losses of plant substrates caused by Teretriosoma nigrescens

5.3.1 Material and method
5.3.2 Results

5.4 The ability of Teretriosoma nigrescens to reproduce on plant substrates

5.4.1 Material and method
5.4.2 Results

5.5 Conclusion

6 Summary of the results

6.1 Biology of Teretriosoma nigrescens
6.2 Host specificity of Teretriosoma nigrescens

7 Récapitulativ des résultats

7.1 Biologie de Teretriosoma nigrescens
7.2 Spécificité d'hôte de Teretriosoma nigrescens

8 Literature

9 Appendix