First report of Septoria leaf spot of pistachio in Iran.
During the summer of 2008, a severe foliar disease was observed on pistachio trees in Golestan Province, in northern Iran. Signs and symptoms of the disease were abundant pycnidia followed by brown spots on leaves. Septoria pistacina was consistently isolated from all the diseased leaves. This is the first report of Septoria leaf spot on pistachio in Iran.