The performance of three cucumber (Cucumis sativus) varieties was evaluated in two field experiments in a soil heavily infested with root-knot (Meloidogyne incognita) and reniform (Rotylenchulus reniformis) nematodes at the Isabela Agricultural Experiment Substation in 1987 and 1988. Control treatments with carbofuran were included for comparison. Results of the combined analysis of variance indicated that the total production of varieties, kg/ha and fruits/plots, was significantly higher (P = 0.05) in carbofuran-treated plots than in non-treated plots. Significant differences were also found for production between the hybrid Dasher II and Poinsett 76. It is important to note that three varieties tested showed resistance to root-knot and reniform nematodes.