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CHAPTER 13 Potential for Biological Control in the Management of Cassava Pests* Elsa Liliana Melo and Carlos Alberto Ortega1 Biological Control direct methods for using, manipulating, or conserving natural enemies. In the first phases, the fundamental Biological control, in the ecological sense, as a phase aspects studied are taxonomy, biology, physiology, of natural control, may be defined as the regulation of genetics, ecology, demography, behavior, and nutrition the population density of a pest organism by natural of pests and their enemies (DeBach 1975). enemies (parasites, parasitoids, predators, or pathogens) at a level that would be equal or greater If necessary, a pest and its enemies are identified by than would have been reached by means of another a specialist, as the organism’s name and classification alternative. Applied biological control supposes are key to all existing knowledge on it, and thus professional activity or human manipulation that understanding and controlling it if it is pest, or using it if promotes the effectiveness of natural enemies it is a natural enemy (Cave 1995b). (DeBach 1977). Natural Enemies In a broad sense, biological control may also be defined as mortality or suppression of pest organisms In biological control, various natural enemies participate, by any biotic factor. In this wider sense, it is the direct for example, parasites, parasitoids, predators, and action of parasites, parasitoids, predators, and microorganisms. These organisms must be able to pathogens (i.e., natural enemies) and of competition respond quickly to the pest’s population dynamics, so with other species for natural resources (i.e., that proportionately more natural enemies are present antagonists) that regulate an organism’s population as the pest population increases.
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