Introduction of some species of Parastagonospora on poaceous plants in Iran

The main purpose of this study was to identify species of parastagonospora in association with poaceous plants in iran. some species of parastagonospora like p. nodorum causes a major loss to wheat production in the world. in the present research, two species including p. nodorum,and p. avenae were identified from different poaceous species. parastagonospora nodorum was identifiedonphalaris arundinacea. however, p. avenae was divided into two formaespecialsi.e. p. avenae f. sp. avenaria (paa)onphalaris arundinacea and avena sativa, and the identified p. avenae f. sp. tritici5 (pat5) onphalaris arundinacea, bromus hordeaceus and aegilops tauschii. species identification was done according to morphology of anamorph and molecular confirmation was performed on the basis of ß-xylosidase gene sequence. pat5 and paa are reported from iran for the first time and also all of the identified hosts are new to the world.