Introduction of some new mitosporic fungi causing leaf spot on broad leaf trees inGuilan province (N Iran)

Several leaf spotting or blotching fungal diseases occur on forest trees in Guilan province (N Iran). Some of them such as maple tar spot affect health of host trees severely، but many are of minor effect. This study was carried out to identify unknown and less known fungi causing leaf spot and leaf blotch diseases on broad leaf trees in this region. So far numerous fungi were collected. Four species viz. Sphaeropsis mespili (on Mespilus germanica)، Seiridium unicorne (on Crataegus melanocarpa)، Septoria cornina (on Cornus sanguinea) and Tubakia dryina (on Quercus castaneaefolia) and two unidentified species belonging to Cylindrogloeum sp. (on Fraxinus excelsior) and Monostichella sp. (on Corylus avellana) are recorded for the first time from Iran. Furthermore، Phloeospora aceris (on Acer cappadocicum) and Marssonina juglandis (on Pterocarya fraxinifolia) are new members to Guilan mycobiota.