بررسی کمی ‌و کیفی برخی ارقام مقاوم چغندرقند به بیماری رایزومانیا

Rhizomania malady disease (Root madness) is one of the important diseases of sugar beet (Beta vulgaris L.) and is common in all parts of the world. Its damages in sensitive cultivar is usually more than 50% and in some cases reaches to 100%. In order to evaluate resistance of internal and external cultivars to this disease, an experiment was carried out on the basis of a randomized complete blocks design with 15 cultivars and four replicates in the Fariman Sugar Factory farms in 2009. Results showed that Rozier, Rasta, Zagano and Antek cultivars were the most resistant ones with regard to their maximum root yield pre hectare. Also Nagano, Rosier, Antek and Rasta cultivars had the highest sugar production per hectare. 7112 hybrid (control) was the most sensitive cultivar and had the lowest root and sugar yields.