Cercosporosis manifests itself in the form of small (2-3 mm), round, light brown spots with a red or reddish-brown border. In the process of aging the grow spots. Often the center of the old stain is perforated. In very severe cases, the lower tier of the leaves die off. Young leaves are almost not infected. On the regrowth of new leaves consumed the accumulated sugar (sugar content could be reduced by 2%), and this leads to an increase in the head of root crop. Today, almost everywhere cercospora blight is the main culprit of the major losses of sugar beet harvest. Every year, the disease kills up to 40% or more of the gross harvest of root crops. Moreover, when beet growers held a high-tillage and fertilizer made and used high-yield seeds, and spent a lot of money to protect the plants, is annoyed suffer significant crop losses, already established in the field.