Several diseases have been identified on pistachios, some of them causing considerable damage. The following is a list of major fungal diseases of pistachio (Pistacia vera L.) determined by pistachio growers in East-Mediterranean and Southeast Anatolian regions. There are six diseases: (i) Septoria leaf spot caused by Septoria pistaciarum; (ii) Verticillium wilt caused by Verticillium dahlia Kleb.; (iii) powdery mildew caused by Phyllactinia angulata (E. S. Salmon); (iv) root and crown rot caused by Phytophthora spp. and Fusarium equiseti (Cardo) Sacc.; (v) stigmatomycosis caused by Nematospora coryli Peglion and Aureobasidium pullulans (de Bary) G. Arnaud; and (vi) Aspergillus blights caused by Aspergillus niger and other Aspergillus spp.