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La distribution et l’incidence du virus de la mosaique du concombre (CMV) infectant le bananier ont ete evaluees dans les bananeraies au Sud-Est de la Cote d’Ivoire. Pour ce faire, des prospections ont ete effectuees dans des plantations industrielles des secteurs de Nieky (Dabou); Banacomoe (Abengourou) et Grand-fleuve (Tiassale). Des donnees de releves phytosanitaires relatives au CMV ont ete recueillies et des echantillons de feuilles symptomatiques et asymptomatiques de bananiers de la variete ‘‘Grande naine’’ ont ete collectes. Des diagnostics serologiques utilisant les tests DAS-ELISA (Double Antibody Sandwich Enzyme Linked  Immunosorbent Assay), ont permis de confirmer la presence du CMV dans ces echantillons. Dans la pepiniere du secteur Banacomoe, le CMV a ete diagnostique dans environ 50 % de lots de plantules issus de micropropagation (vitroplants). L’incidence de la maladie enregistree sur la base des symptomes observes dans les trois secteurs indiquent un taux variant de 5 % a 25 % avec une predominance (66,25 %) des symptomes severes (pourriture du coeur) sur les plants de 3 mois d’âges. Cependant, les plantations de plus de trois mois d’âge et les plants de la collection in vivo de pieds meres utilises pour la micropropagation n’ont presente que de rares plants infectes. La repartition du CMV dans les plantations de  moins de 3 mois a revele une predominance des foyers d’infection de type marginal. Mots cles : Cucumber Mosaic Virus, DAS-ELISA, incidence, distribution, Musa spp., Cote d’Ivoire This survey has been carried out in order to study the incidence and distribution of the Cucumber Mosaic Virus (CMV) infecting banana in the South-East part of Cote d’Ivoire. For this purpose, an assessment was conducted in the zones of Nieky (Dabou); Banacomoe (Abengourou) and Grand-fleuve (Tiassale), in order to gather phytosanitary data concerning the occurrence of the CMV in the nursery and fields. Banana leaf samples of the ‘‘Grande naine’’variety showing CMV symptoms and some without symptom were collected. The presence of the virus has been confirmed by serological tests using DAS-ELISA (Double Antibody Sandwich Enzyme  Linked Immunosorbent Assay). About 50 % of the tissue culture derived banana batches composing the nursery in a plantation of Abengourou was found to be infected by CMV. Based on symptoms observed, the incidence of the disease in these production sectors visited, varied from 5 % to 25 % with a predominance (66,25 %) of severe symptoms (heart-rot, symptoms) on plants of less than 3 month of age. However, plants beyond three months showed less CMV infected plants and less severe symptoms. Similarly, only few plants were infected in the germplasm containing mother plants used for micropropagation. In the field, banana plants showing CMV symptoms were more frequently distributed at the edge of the fields.

Distribution et incidence de la mosaïque du concombre (cmv) dans des bananeraies industrielles au sud-est de la côte d’ivoire.