Evaluation of tomato cultivars to root-knot nematode (Meloidogyne javanica)

The root-knot nematode, Meloidogyne javanica, is one of the major tomato pathogens in Iran. Using resistant varieties is one of coping method to this disease. In the current study, tolerance of some tomato cultivars to root knot nematode was evaluated in greenhouse. In this research resistance of 8 tomamo cultivars called (CH- Falat, Y- Falat, Eden Petopride 2, Petopride 5, Xaman, Comodoro and GS12) were evaluated to root-knot nematode in greenhouse in completely randomized design with four replications. The 4-6 leave’s seedling of tomato was inoculated with 5000 larva of nematode per each kg of pot soil. After 2 months, disease index were evaluated on tomato plants. Cluster analysis showed the range of susceptibility to resistance of tomato cultivars to M. javanica. Results based on pathogenicity traits indicated that the cultivars were divided into four groups: very sensitive, sensitive, semi-sensitive and fairly resistant. CH- Falat cultivar was very sensitive, culticars Y- Falat and Eden were sensitive, cultivars Petopride 2, Petopride 5, Xaman and GS12 were semi-susceptible and Comodoro was relatively resistant to root knot nematode.