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De mai a juin 2013 et 2014 respectivement, les fleurs de Sesamum indicum ont ete observees en vue de l’etude de l’activite des insectes et de la determination de l’impact de celle-ci sur les rendements fruitiers et grainiers de cette plante. Deux traitements ont ete formes a partir du marquage de 1347 et 5480 boutons floraux pour chacune des periodes d’investigation selon la presence ou l’absence de protection de ces bouquets floraux. Le comportement de butinage des insectes, le taux de fructification, le nombre moyen de graines par fruit et le pourcentage de graines normales ont ete evalues. Les resultats montrent que 15 especes d’insectes ont visite les fleurs de sesame en 2013 et 2014. Amegilla sp. etait l’espece la plus frequente, suivie de Camponotus flavomarginatus et Apis mellifera adansonii . En comparant les rendements des deux traitements, il est apparu que les insectes ont augmente le taux de fructification de 27,35%, le nombre de graines par fruit de 15,99% et le pourcentage de graines normales de 12,26%. Cette etude a fourni une certaine connaissance sur la diversite des insectes floricoles du sesame, qui peut etre exploitee pour ameliorer la production fruitiere. © 2016 International Formulae Group. All rights reserved. Mots cles: Insectes floricoles, Sesamum indicum , fleurs, pollinisation, rendements English Title: Diversity of flowering insect fauna on Sesamum indicum (L.) 1753 (Pedaliaceae) and its impact on fruit and seed yields in Bambui (North-West, Cameroon) English Abstract From May to June 2013 and 2014 respectively, Sesamum indicum flowers have been observed for the study of insect activity and determination of the impact of it on pod and seed yields of this plant. 1347 and 5480 flower clusters for each studied year were labeled and divided in to two treatments, differentiated according to the presence or absence of protection against insect’s activities. Insects foraging activities, the fruiting rate, the percentage of normal seeds and the mean number of seeds per pod were recorded. Results have shown that 15 species of flower-visiting insects were recorded on S. indicum flower within the two years. Amegilla sp. was the most frequent, followed by camponotus flavomarginatus and Apis mellifera adansonii . The comparison of yields of the two treatments showed that insects significantly increased the fruiting rate by 27.35%, as well as the number of seeds per pod by 15.99% and the percentage of normal seeds by 12.26%. This study provided some knowledge about the anthophilous insect’s diversity of this Pedaliaceae, which can be exploited to improve fruit production. © 2016 International Formulae Group. All rights reserved. Keywords: Anthophilous insects, Sesamum indicum , flowers, pollination, yields

international journal of biological and chemical sciences

Diversité de l’entomofaune floricole de &lt;i&gt;Sesamum indicum&lt;/i&gt; (L.) 1753 (Pedaliaceae) et son impact sur les rendements fruitiers et grainiers à Bambui (Nord-Ouest, Cameroun)