Puccinia graminis in Czechoslovakia was studied principally on collections from localities with more or less natural occurrence of Berberis vulgaris. Main interest was paid to the ecology and morphology of its urediospores. According to urediospore size and shape four different morphologic groups were recognized. They characterize individual populations or specialized forms. Inoculation experiments document approximately the host range. In Czechoslovakia we recognize 2 subspecies of stem rust. P. graminis subsp. graminis embraces cerealicolous specialized forms together with some large-spored specialized forms on wild grasses: f. sp. secalis and f. sp. Agropyron repens–Dactylis glomerata. P. graminis subsp. graminicola Urban is mainly graminicolous, with races and populations having small urediospores. Somewhat special position in the subspecies graminicola is occupied by three populations that parasitize the following hosts: Anthoxanthum odoratum, Deschampsia cespitosa and Phleum pratense. A further study of epiphytotics pattern should not overlook the very conspicuous existence of large-spored stem rust populations on wild grasses.
Urban Z., Marková J. (1983): Ecology and taxonomy of Puccinia graminis Pers. in Czechoslovakia. – Česká Mykologie 37(3): 129–150.
