Monitoring the development of leaf rust pathogen on common wheat specimens

During 1995–2005 the leaf rust pathogen was monitored on common wheat specimens with identified Lr resistance genes. The number of pustules on the flag leaf surface of the host plant, pustule area, number of spores in it, and type of reaction are used as the main indices of pathogenesis of the pathogen. A number of regression models reflecting the main quantitative regularities of variables of the pathogen’s state are proposed.