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Résumé :
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The author presents the results of a theoretical study on the roles that parasitic insects can and cannot play against populations of their insect-pest hosts under natural conditions. Furthermore, the feasibility of managing major insect-pest problems through highly augmentative releases of parasites in the host ecosystems is critically examined by theoretical deductive procedures. There are chapters on the following topics: factors influencing the behaviour and efficiency of host-specific parasites; basic principles of pest population suppression by parasite releases; and the suppression of Diatraea saccharalis, Ostrinia nubilalis, Spodoptera frugiperda, Lymantria dispar, Heliothis spp. (H. virescens and H. zea [Helicoverpa zea]), Anthonomus grandis and Tephritidae. Also, there are appendices dealing with the following additional topics: analysis of some aspects of the modelling procedures; future roles of classical and augmentation biological control techniques for insect-pest management; principles of insect predation versus insect parasitism; and principles of insect eradication and population management. There are subject and author indexes.
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