Aim. The usage of biotic elicitors for elicitation of defense responses may induce plant disease resistance and prevent increased environmental pollution by pesticides. Hydrogen peroxide is a well-known signal molecule for photosynthetic status and for stomatal movements, and systemic acquired resistance to pathogens in plants proposed to be dependent on H2O2. The aim of research was to analyze in field trials the effect of oxalic, ferulic and kojic acid on H2O2 content and winter wheat resistance against Septoria tritici. Methods. Content of endogenous H2O2 was measured in elicitor treated and inoculated by S. tritici wheat plants (cv. Oberig) during different ontogenesis phases. The extent of disease development, morphometric parameters and yield structure were analyzed. Results. It is shown that the lowest level of hydrogen peroxide in leaves at the necrotrophic stage of pathogen infection was after oxalic acid treatment, and the highest – after koijc acid influence. Conclusions. The data obtained suggest that elicitors induced defense responses in winter wheat against S. tritici and hydrogen peroxide content is an important and valuable parameter.
 Keywords: biotic elicitors, hydrogen peroxide, induced resistance, Triticum aestivum L., Septoria tritici Rob et Desm.