The objective of this study was to determine the performance of larvae of the banana weevil, Cosmopolites sordidus Germar, on different cultivars of banana. We carried out experiments in the laboratory, feeding larvae on corms of cultivars with varying levels of resistance. We determined development duration and survivorship, and measured adult weights. The development duration of larvae feeding on susceptible cultivars was lower than that of larvae raised on resistant cultivars. However, survivorship and adult weights had no relationship with resistance levels observed in the field. The implications of these results for studies of resistance in banana plants are discussed.