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La production du riz au Burkina Faso est limitee par certaines maladies fongiques transmises par les especes du genre Fusarium. A cet effet, l’importance de ces champignons a ete evaluee sur 59 echantillons provenant de 7 varietes de riz par la methode du papier buvard. Les sites sont repartis dans les 13 regions administratives situees en fonction des 3 zones agroecologiques du pays. Fusarium spp. a ete identifie dans 81,35% des echantillons a des taux d’infection de 1 a 41%. Fusarium spp. est present dans toutes les zones agroecologiques avec des taux de prevalence variant de 78,2 a 83,87%. Les echantillons provenant de la zone Soudano-Sahelienne et Soudanienne ont ete plus infectes (respectivement 6,74% et 5,34%) que ceux de la zone Sahelienne (1,40%). Ces champignons ont ete rencontres dans toutes les regions du pays avec des taux d’infections de semences variant de 0,5 a 15,25%. Les regions les plus attaquees etant le Centre-Sud (15,25%), le Centre (11,75%) et la Boucle du Mouhoun (11,5%). L’etude montre un taux d’infection global des semences par Fusarium spp. de 5,74%. Une identification des especes rencontrees sur le riz est imperative. L’evaluation de leur pathogenicite permettra de determiner celles impliquees dans le gigantisme du riz. Mots cles : Fusarium spp., prevalence, taux d’infection, semences de riz Incidence of Fusarium spp. associated with rice seeds (Oryzae sativa L.) in Burkina Faso Rice production in Burkina Faso is limited by some fungal diseases transmitted by species from the genus Fusarium. To this end, the importance of these fungi was assessed on 59 samples from 7 rice varieties using the blotting paper method. The sites were distributed in the 13 administrative regions located according to the 3 agro-ecological zones of the country. Fusarium spp. was identified in 81.35% of the samples at infection rates ranging from 1 to 41%. Fusarium spp. is present in all agroecological zones with prevalence rates ranging from 78.2 to 83.87 %. Samples from the Sudano-Sahelian and Sudanian zones were more infected (6.74% and 5.34% respectively) than those from the Sahelian zone (1.40%). These fungi were found in all regions of the country with seed infection rates ranging from 0.5 to 15.25%. The most affected regions were the Centre-South (15.25%), the Centre (11.75 %) and the “Boucle du Mouhoun” (11.5%). The study shows an overall seed infection rate of Fusarium spp. of 5.74%. Identification of the species found on rice is imperative. Evaluation of their pathogenicity will make it possible to determine which species are involved in the rice's gigantism.Keywords: Fusarium spp., prevalence, infection rate, rice seed

Incidence de Fusarium spp. associé aux semences de riz (Oryza sativa L.) au Burkina Faso