In recent decades, the concept of environmental protection of crops was widely adopted. The studies found that the fungi of the genus Bipolaris spp., isolated from infected root decay winter wheat, B.sorokiniana is predominant. Typical for this link of a crop rotation it is possible to consider F.culmorum, F.avenaceum, F.sporotrihciella, F.nivale and F.gibbosum as the frequency of their occurrence made over 30 %. The highest incidence rate (67,8 %) was at F.gibbosum. At a size of infectious potential of activators of root decay – B.sorokiniana and mushrooms of the sort Fusarium spp., fungistazis of soils has considerable impact in a rizosfer of winter wheat. In its turn, it depends on the previous culture. Fungistazis of soil is weak when sowing winter wheat on grain predecessors. So, after the winter wheat the number of non-germinated conidia of B.sorokiniana was 35,1 %, F.gibbosum – 30,5 %, and after spring wheat – 15,4 and 25,2 %, respectively. The study found a direct link between the antagonistic activity of the soil and its fungistazis, antagonistic activity and viability of conidia F.gibbosum. Increase in antagonistic activity leads to strengthening of a fungistazis of the soil and reduction of viable conidia.