Fruit flies are a major pest of mangoes and other fruits in Côte d'Ivoire. In order to effectively control fruit flies, a test to evaluate the effectiveness of Great Fruit Fly Bait (GFFB) containing the active ingredient, Abamectin, was carried out in three orchards in the Odienné department. The reference control was the Success Appat (GF-120) added to an untreated control. The treatment was carried out on the entire elementary plot once a week for seven weeks. The treatment consisted of spraying the foliage of each treated tree (the fruits were not treated). After seven weeks of application, 100 mangoes were randomly harvested from each elementary plot. Those that are bitten were counted and incubated in the laboratory until the emergence of adult flies that were then identified. The results obtained on the three (3) orchards show that the level of mango infestation was low in orchards treated with GFFB (0.45 pupa per fruit per weight for the 1 Litre/ha dose and 0.04 pupa per fruit per weight for the 1.5 Litre/ha dose) and GF120 (0.36 pupe per fruit per weight). In contrast, in untreated plots, infestation levels were high (12.47 pupae per