In this paper the author publishes the first part of a list of his collections of downy mildews (Peronosporomycetes), rusts (Pucciniomycetes) and smuts (Ustilaginomycetes and Microbotryomycetes) collected from 1949 to 2013 on the entire territory of the Czech and Slovak Republics. In this part the samples which he has identified to date, in total 120 species on 218 host plants, are presented.Of these species the most interesting are Knautia × posoniensis as a new host of Peronospora violacea, Plasmoverna pygmaea s. l. on Aconitum plicatum in the Hrubý Jeseník mountains as the only known locality in the Czech Republic, Peronospora dianthicola as a species new to Moravia and 29 host plants new to Moravia.
Müller J. (2015): Seltenere Falsche Mehltaupilze, Rost- und Brandpilze der Tschechischen und Slowakischen Republik. I. Teil Peronosporomycetes. – Czech Mycology 67(1): 69–83.
