Background. Since the 60's, trimedlure has been the main para-pheromone used to attract the males of a series of Ceratitis spp. of economic importance, such as the Mediterranean Fruit Fly C. capitata or the Natal fruit fly, C. rosa, for monitoring or detection purposes. In recent years, within a FAO-IAEA coordinated programme, research has been conducted on the possible use of some natural essential oils to improve the sexual competitiveness of the males of such species, in the framework of SIT (Sterile Insect Technique) programmes. Within these programmes the strong attractiveness of Ginger Root Oil (GRO) for the males of some Ceratitis spp. has been confirmed. Based on these results, it appeared useful to compare the attractiveness of a recently available commercial dispenser of Enriched Ginger Oil (Insect Science SA, Tzaneen, South Africa) with that of a standard trimedlure dispenser, in field trapping experiments. More recently, field-cage tests were carried out to determine the factors (age, food status, mating...) influencing the male response in both species. Methods. Four field experiments were conducted in 2009-2010 on different crops. The first one was carried out in a Citrus orchard situated in Bassin Martin, in the south of the island, at an altitude of 290 m a.s.l.. The second trial was carried out in another Citrus orchard, in Petite Ile in the south (alt.: 300m) and the third one in Etang-Salé, in the south-west, in a chilli plot (alt.: 10m). Finally a fourth trial, set up in Piton Armand on the East in a Chinese guava plot (alt.: 450m), is still in progress. For each trial, two types of attractants were compared in Tephri-traps (Sorygar, Spain): Enriched Ginger Oil (EGO) ("Pherolure", Insect Science SA, Tzaneen, South Africa) and trimedlure (Agrisense BCS Ltd, Pontypridd, UK). The attractant dispensers were placed in a small plastic basket at the top of the trap, while a strip of DDVP was placed at the bottom of the Tephri-trap to kill the adult flie