Leaf rust, caused by the plant fungus genus triticina , is one in every of the foremost damaging rust diseases of wheat in Russia. Populations of P . triticina were monitored in seven regions of Russia from 2001 to 2018, with a complete of five,191 single urediniospore isolates from bread wheat (Triticum aestivum ) being analysed. Populations have modified considerably all told regions since 2012, once 2 years of drought (2010–2011). Regional collections of P . triticina were additionally considerably totally different between the 2 periods 2001–2009 and 2012–2018, with changes on 2 geographic gradients from West geographical area to the geographical area and geographical area (North Caucasia) of the ecu a part of Russia. All tested isolates were avirulent to resistance cistron Lr9 in 2001–2009 however, since 2010, virulence to Lr9 has occurred and annually redoubled within the Asian a part of Russia (Ural and West Siberia) because of preparation of cultivars with the Lr9 cistron. Virulence to Lr2a and Lr15 was significantly lower in Dagestan (6%–33%) and every one European regions (35%–67%) than in Asian regions (84%–96%). throughout 2001–2009, virulence on Lr1 was additionally lower in Dagestan (33%) and also the European regions (50%–77%) than in Asia (91%–96%); but, by 2012–2018, nearly all isolates were virulent on Lr1 . exceptional changes were discovered in frequencies of P . triticina races outlined by their virulence/avirulence to Lr1 and Lr2a genes. we have a tendency to postulate the P . triticina population in Dagestan is particular thereto space and microorganism populations in European and Asian components of Russia area unit distinct