Evaluation of sugar beet commercial cultivars resistance against root rot caused by R. solani and F. oxysporum

摘要: In the present study, resistance of 30 common commercial sugar beet cultivars against root rot caused by Rhizoctonia solani and Fusarium oxysporum was evaluated in West Azerbaijan province during 2017 2018. Cultivars were inoculated pots under controlled greenhouse conditions. The experiment conducted completely randomized design with 15 replications 5 controls for each treatment. Ranking based on intensity inoculation R. done eight weeks after a scale 1-9. Harvest Index also calculated leaves color yellowing F. oxyporum recorded weekly from second week 0-5 index. mean area disease progress curve (AUDPC) development comparison among cultivars. Also, order to compare damping off normal condition, field complete block design. Missing or dying plants counted three time thinning weeding. Dying identified transferred laboratory diagnosis disease. results AUDPC calculation obtained conditions resistant identified. white yield per unit calculated. genetic characteristics introduced seeds companies compared high introduced. BTS233, Flores, Delta, Murialle showed relative both pathogens significant hectare are recommended fields contamination