Abstract: In recent decades, the concept of ecologized cereal crop protection is widespread. The basis of this concept is such a natural phenomenon as soil fungistasis. The results of the study showed that the extent of infectious potential of root rot pathogens, B. sorokiniana and Fusarium spp. in the rhizosphere of Winter wheat is greatly affected by soil fungistasis which in its turn depends on the preceding crop. Soil fungistasis is appeared to be slight after preceding cereal crop. Thus, the number of ungerminated B. sorokiniana conidia was 35.1%, F. gibbosum conidia 30.5% after Winter wheat and after spring wheat 15.4 and 25.2%, respectively. A direct relationship between antagonistic activity of the soil and its fungistasis, antagonistic activity and viability of F. gibbosum conidia is determined that means an increase in antagonistic activity leads to increased soil fungistasis and the reduction of viable conidia.