The following strains o fphytopathogenic fungi were used in the study: Bipolaris sorokiniana (Saccardo) Shoemaker, isolate no. 13, from wheat stem (Triticum aestivum L.) Russia (agent of common leaf spot, black germ of grain and root rot of grain crops); Fusarium culmorum (Smith) Saccardo, isolate no. 258, from wheatroot (Triticum aestivumL.), Russia (agentofroot and stem rot of grain crops, fusariosis of spike); and Sclerotium bataticola (Taubenhaus), from maize (Zea mays L.), Russia, isolate no. 180 (agent of sclerotiniose of agricultural crops)