The assessment of winter wheat resistance to brown rust and powdery mildew in the Rostov region The article presents the results of many-year study of winter wheat resistance to such leaf diseases as brown rust and powdery mildew. These pathogens are often spread on wheat sowings and largely damage yields. For successful selection on immunity it’s essential to introduce varieties with resistance to the local populations of brown rust and powdery mildew pathogens into hybridization. 268 varieties of winter wheat with various geo-geographical origins have been studied on the artificially infected areas. As a result of the field experiments, the varieties “Yumpa”, “Liga1”, “Yuzhanka”, “Grom”, “Kuren” (Russia, P. P. Lukiyanenko RCG), “Evgeniya”, “Berezit”, “Stavka” (Russia, North-Caucasus FRAC), “Anisimovka”, “Astarta” (Ukraine) have been found largely resistant to brown rust (infection less than 15%). 34 varieties (or 12.7% of all studied varieties) have been found resistant to powdery mildew. They are “Zhakhidka Odesskaya”, “Solokha” (Ukraine), “Famulus” (Germany), “Natula” (Poland), “Tatsitus” (Austria), “Karolina 5”, “KD Aliyans”, “Vekha”, “Vid” and others (Russia). The winter wheat varieties resistant to one or more pathogens are of special value for breeding. There are 16 varieties resistant to the leaf pathogens in the studied material. They are “Samuray”, “Rigi”, “Etana” (Germany), “Bombus”, “Seylor”, “Menestrel” (France) and others.