Assessment of the resistance of inbred table beet lines to cercosporosis (Cercospora beticola sacc.) in field and laboratory conditions

Relevance. Cercospora leaf spot Cercospora beticola) is a widespread disease of table beet that reduces the yield of root crops in many beet-growing regions. Annual losses from cercosporosis amount to 30-40%, and in the years of epiphytotic diseases - 50% or more. The fungus has a complex intraspecific structure, includes many pathotypes and races, which should be taken into account when breeding for resistance. The main method of creating resistant forms of table beet to C. beticola is the selection of cercospore-resistant lines in the natural manifestation of the disease and on artificial backgrounds. In open ground conditions, it is not always possible to assess the resistance of table beet to cercosporosis, since cercosporosis is weak in some hot and dry years. Therefore, laboratory assessment methods are important to accelerate the breeding process. The purpose of the research is to carry out an immunological analysis of beet lines in the field and laboratory conditions for the selection of sustainable material.