Host reaction of some cucumber cultivars to Meloidogyne arenaria and M. incognita Cultivation of resistant or poor hosts to root-knot nematodes provides significant advantages in nematode-infested areas. In this respect, it is important to know the reactions of the different varieties to the root nematodes. In this study, the host status of 15 cucumber cultivars (Cucumis sativus), which are widely used commercially, to M. arenaria and M. incognita was evaluated by a pot experiment in a greenhouse. Although nematode infection increased root weights of all cultivars compared to the controls, these increases were significant (P≤0.05) only in 1 cultivar (Toskono) and other 2 cultivars (Everest and Seyhan) for M. arenaria and M. incognita, respectively. These cultivars also had the highest formation of galls for related nematode species among all tested. All of the cucumber cultivars were susceptible to different levels of both nematode species, and the lowest gall index according to the 0-10 gall index were detected in Almino with 2.8 for M. arenaria and Venüs with 3.8 for M. incognita. The highest and the lowest reproduction factors on cultivars were 5.84 and 17.16 for M. arenaria and 8.28 and 17.84 for M. incognita, respectively. Nine cultivars showed different reaction at the significant level in terms of reproductive factor compared to the nematode species and 8 of them also differed based on the galling index.