Investigation the resistance of greenhouse-cucumber cultivars to Fusarium stem and root rot disease (Fusarium oxysporum f. sp. radicis-cucumerinum)

For determination the host range of Fusarium stem and root rot of green-house cucumber (Cucumis sativus) that caused by Fusarium oxysporum f. sp. radicis-cucumerinum، after isolation، identification and study of pathogenisity، 16 species of several plant families were artificially inoculated with this pathogen by sand and corn meal contaminated with pathogen، two varieties of Cucumis melo، of Cucurbitaceous developed stem and root rot symptoms similar to those that were developed on cucumber. Symptomology and host range studies indicate that this pathogen is F. oxysporum f. sp. radicis-cucumerinum. Reactions of 20 cucumber cultivars were tested، ranged from susceptible to tolerant to this disease under glasshouse conditions showed that the tolerant cultivars were 120118، Ayat، FD-C101، Festival، Jakie، Khassib، PSR36-45007، SR36-45664 and Storm and the most susceptible cultivars were 32-PV، 8-Ayat، CB61688222، Janette، Nasco، Negeen، Nicoo 100، PSR36-47112، Rubah-l، Rubah-s and Soltan.