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- W2071619674 abstract "Résumé Une étude au champ de la dynamique des populations de la cochenille du manioc Phenacoccus manihoti Matt.-Ferr. (Hom. Pseudococcidae) et des agents biologiques qui lui sont associés a été entreprise dans 4 parcelles de manioc Manihot esculenta Crantz (Euphorbiacée) situées dans 2 localités différents du Congo. Elle a essentiellement montré que les 7 à 16% de parasitisme développés par le parasitoïde exotique Epidinocarsis lopezi (De Santis) (Hym. Encyrtidae), 4 ans après son introduction, n'affectent pas significativement la dynamique des populations du ravageur. Les taux importants d'hyperparasitisme (67 à 100%) dont le parasitoïde primaire est l'objet limitent la reproduction de ses populations. Toutefois il est difficile de conclure quant à l'impact réel des hyperparasites sur l'efficacité de l'auxiliaire dans la lutte contre la cochenille. Abstract Influence of hyperparasitism on populations of the encyrtid Epidinoc arsis Lopezi, parasitoid of Phenacoccus manihoti introduced in Congo A field study of cassava mealybug Phenacoccus manihoti Mat.-Ferr. (Hom. Pseudococcidae) population dynamics, together with that of associated biological agents was made on 4 sample plots in cultivated manioc Manihot esculenta Crantz (Euphorbiacée) in two different areas of the Congo. It showed that four years after introduction, the 7 to 16% of parasitism attributable to the exotic parasitoid Epidinocarsis lopezi (De Santis) (Hym. Encyrtidae), did not significantly affect pest population dynamics. High levels of hyperparasitism (67% to 100%) to which the parasitoid is itself subject limits its population levels. It is, however, impossible to determine the real effect of hyperparasites on the efficiency of the auxiliary in the biological control of the mealybug." @default.
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- W2071619674 date "1989-10-01" @default.
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- W2071619674 title "Influence de l'hyperparasitisme sur les populations d'un hymenoptère encyrtidae, Epidinocarsis lopezi, parasitoide de la cochenille du manioc Phenacoccus manihoti introduit au Congo" @default.
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- W2071619674 doi "https://doi.org/10.1111/j.1570-7458.1989.tb01273.x" @default.
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