STUDYING OF THE SPECIFIC STRUCTURE OF THE POPULATIONS OF THE WHEAT SEPTORIOSIS AGENTS IN THE STEPPE AND FOREST -STEPPE ZONE OF THE NORTH KAZAKHSTAN REGION

Abstract

The article provides data on the study of the species structure of pathogens of septorian blotch. As a result of studying the species composition, 3 main species of the genus Septoria were identified: S. tritici, S. nodorum and S. avenae f. sp. triticea.The species structure of pathogens of wheat Septoriawas studied in the conditions of the steppe and forest-steppe zones of the North Kazakhstan region. According to the results of mycological analysis, the Septoriatritici species occupied the leading position. The frequency of occurrence in the steppe zone was 71,8%, in the forest-steppe zone 75,0 %.The Septorianodorumspecies ranked
second. The frequency of occurrence in the zones was 30,7 % and 11.4%.S. avenaehad the lowest mean incidence -19,6 % and 3,3%, respectively.