Despite its status as the first world's cocoa producer, the cocoa production system in Côte d'Ivoire remains characterized by low yields. To solve this problem, a study was carried out on the cocoa farms of the Agricultural Society of Bandama, in southern center of Côte d'Ivoire, in the forest and savannah transition zone. It focused on determining the impact of associated forest species in cocoa farms on cocoa tree development. Thus, the associated tree species have been inventoried. The number of associated species per hectare allowed classification of the cocoa farm according to the degree of shade. From o to more than 80 trees / ha, rates of parasitic attack and mortality increase, while yield of cocoa bean decreases. For cocoa trees at the beginning of maximum yield stage (8 years old plantation), the full-sun system is more productive, with 498 kg of cocoa beans / ha. For the highest density of associated forestspecies, the yield was 127 kg / ha, with a cocoa plant success rate of 55% and a parasitic attack rate of 40%. Moreover, the parasitic attack rate of less than 20%, due to the associated trees, could lead to a reduction of almost half of the potential yield. To avoid a fall in yield and maintain the success rate at an acceptable level, in shade systems, a threshold ISSN 1857-7431 165 of 25 to 30 associated trees / ha has been established. But the parasitic attacks, responsible for the drop in yield should be controlled.European Scientific Journal January 2017 edition Vol.13, No.1 ISSN: 1857 -7881 (Print) e -Keywords: Cocoa production, density of associated forestspecies, parasitic attack, yield, Côte d 'Ivoire RésuméMalgré son rang de premier producteur mondial de cacao, la cacaoculture ivoirienne demeure caractérisée par de faibles rendements. Pour résoudre ce problème, une étude a été menée dans les parcelles de la Société Agricole du Bandama, au centre sud de la Côte d'Ivoire, en zone de transition forêt savane. Elle a porté sur la détermination de l'impact des arbres forestiers associés aux exploitations, sur le développement des cacaoyers de 8 ans (stade d'amorce de rendement maximum). Ainsi, l'inventaire de ces espèces et leur densité ont-ils permis de classifier les parcelles selon le degré d'ombrage. De o à plus de 80 arbres/ha, les taux d'attaques parasitaires et de mortalité augmentent, alors que le rendement en fève de cacao décroit. Dans les conditions de cette étude, le système sous plein soleil a été plus productif, avec 498 kg de fèves/ha, contre 127 kg/ha pour les plus fortes densités d'arbres associés, avec des taux moyens de 55 % de réussite et 40 % d'attaques parasitaire. Pour éviter la chute du rendement et maintenir le taux de réussite à un niveau acceptable, dans les systèmes sous ombrage, un seuil de 25 à 30 arbres associés/ha a été établi. Mais les attaques parasitaires, responsables de la chute du rendement, devraient être contrôlées.
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