Iranian pistachio nuts occupy their place in the world market and are the best-selling nuts. These nuts are valued for their tasty, large, high degree of openness. For this reason, there is a great interest in these varieties among the population of our republic, and the work on creating a garden from these varieties is carried out by local residents. However, given that these pistachio orchards are affected by diseases that have a significant negative impact on its yield, this article provides information on some diseases and their biology found in foreign pistachio varieties.