Cross-pollination, Natural and artificial self-pollination were performed in addition to open pollination in three Hungarian sour cherry cultivars (Érdi bőtermő, Érdi jubileum and Cigány meggy), planted under Mashhad, Iran climatic conditions. An experiment conducted using factorial based on randomized completely block design during 2005 and 2006, with 6 replications in 2005 and 4 replications in 2006. Flowers before anthesis and in balloon stages were isolated with paper bags from guest pollens and pollinated in appropriate time. Arc-sinus transformation was carried out on the data of final fruit set percentages obtained from cross pollination, open pollination, natural and artificial self pollination. The averages of final fruit set showed the advantage of open pollination (14.6%) in compare with natural self pollination (4.4%) and artificial self pollination (13.0%). Siah mashhad sweet cherry cultivar with more than 70% overlap of flowering and 9.8% fruit set in 2005 and 17.9% in 2006 was the best among applied pollinisers for Érdi bőtermő sour cherry cultivar. Also, Siah mashhad with more than 50% overlap of flowering time and 25.8% fruit set was the best polliniser for Cigány meggy sour cherry. Among the pollinisers, Siah mashhad was the best for Érdi jubileum with more than 50% overlap and 15.2% fruit set.

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