Population dynamics of a non-cultivated biennial plant Tragopogon pratensis infected by the autoecious demicyclic rust fungus Puccinia hysterium

► SIR model with characteristics of Tragopogon pratensis - Puccinia hysterium. ► Produced cyclical, stable and extinction dynamics. ► Pathogen-induced mortality had little additional role in population dynamics. ► Limited evidence of density-dependence in seedling emergence. ► Pathogen characteristics contribute to host regulation.