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Leguminous trees provide edible fruits, wood, forage and the main nitrogen in ecosystems. They are increasingly used in agroforestry systems as shade for trees and for soil reclamation. However, leguminous trees are often hosts of Mistletoes, vascular parasites that destroy foliages, depreciate wood quality and cause the death of their hosts. In this study on Leguminous trees, in a forest area of Cote d'Ivoire, infestation rates and intensities of Mistletoes were assessed at the Centre National de Recherche Agronomique (CNRA) station in the district of Oume. Results show a high sensitivity of exotic species (Acacia mangium, Acacia auriculaeformis, Albizia guachapele and Albizia lebbeck) to Mistletoes, while native species (Albizia adianthifolia and Albizia zygia) were less infested. Infestation rates seemed to be related to the position at the exploitation border, the weediness of plots and the proximity of crop land that attract Mistletoes scattering birds. The most infested leguminous tree is Albizia lebbeck and the plentiful parasitic was Tapinanthus bangwensis. Les Legumineuses arborescentes produisent des fruits comestibles, du bois, du fourrage et fournissent l'essentiel du flux d'azote dans les ecosystemes. Elles sont utilisees dans les systemes agroforestiers pour l’ombrage et la restauration de la fertilite. Cependant, ces Legumineuses arborescentes sont parasitees par les Loranthaceae, qui detruisent le feuillage, deprecient la qualite du bois et provoquent la mort de leurs hotes. La presente etude, realisee sur des Legumineuses arborescentes, plantees dans la zone forestiere de la Cote d'Ivoire, a permis d'evaluer le taux et l'intensite d'infestation des Loranthaceae sur la station de Oume, Centre National de Recherche Agronomique (CNRA). Les resultats montrent une forte sensibilite, aux Loranthaceae, des Legumineuses arborescentes exotiques (Acacia mangium, Acacia auriculaeformis, Albizia guachapele et Albizia lebbeck), tandis que les especes locales (Albizia adianthifolia et Albizia zygia) ont ete moins infestees. Les taux d'infestation des parcelles ont semble etre lies a l'emplacement en bordure d'exploitation, au degre d'enherbement et a la proximite des espaces agricoles frequentes par les disseminateurs des Loranthaceae (oiseaux frugivores). La Legumineuse arborescente la plus infestee a ete Albizia lebbeck et la Loranthaceae la plus infestante Tapinanthus bangwensis.

Parasitisme des loranthaceae dans les plantations de legumineuses arborescentes en zone forestiere de la C&#244 d'Ivoire