The influence of root rot (Bipolaris sorokiniana) on the productivity of durum wheat in the soil and climatic conditions of the Southern Urals

Abstract

The detection of factors that affect the decrease in the productivity of durum wheat is the basis for the study of plant diseases in the soil and climatic conditions of the southern chernozems of the Cis-Ural region. On the basis of this premise, for the first time, studies on common root rot (Bipolaris sorokiniana) of durum wheat are conducted in field and laboratory conditions. There is the method of field experience, stationary accounting of agrometeorological conditions and disease determination is used. The results of six years research show that in the third variant of the experiment, the least spread and development of root rot is observed on a non-windy background of nutrition up to 28.6 and 10.2%. The dependence on the influence of air temperature is 94.4 and 70.0%. The highest crop yield of durum wheat was obtained in the average dry year of 2017 according to the green-manured fallow predecessor. It consists of 21.4 c on fertilized and 21.1 c per 1 ha on non-winded backgrounds of mineral nutrition. The maximum effect of root rot development on the decrease in durum wheat productivity is noted in the fourth version of the experiment and it consists of 80.04 and 89.66% on two nutrition backgrounds. The study results have a scientific and practical importance in the field of phytopathology, farming and intensive agriculture.