Justification of the need to protect wheat crops against disease agents in the North–Eastern part of the Central Chernozem region

Abstract To develop and optimize protective measures in the CCR conditions, an analysis of epidemic resistance zoned varieties hybrid lines spring wheat to causative agents septoria, brown yellow rust was carried out; effect fungicides, biological agents, their binary mixtures studied for crops. Among selection material wheat, numbers were identified selected as potential genetic sources donors, combining environmental stress factors (brown rust, septoria blight) with productivity adaptability conditions Central Black Earth Region. Using DNA markers, Lr genes donors leaf identified. In genotypes lines, Lr19 gene dominance revealed combination weakly effective Lr10, 20, 26. It observed that + Lr26 increases level resistance. All affected by diseases, which indicates need measures. The effectiveness chemical against aerogenic diseases established range 82.1-100%. Amistar Extra perenophorosis Rex Duo Title powdery mildew. Amist 0.7 l / ha Biostim 2.0 (99.4%) mildew (98.9%). A mixture Alfastim 30 ml (93.0%) pyrenoforosis (100%). Mixed forms (91.3-95.7%) Healthy yield 0.9 (91.0-95.7%) spot rust.