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¹ O.M.Ü Ziraat Fakültesi Bahçe Bitkileri Bölümü, 55139 Kurupelit / Samsun
² Atatürk Çay ve Bahçe Kültürleri Araştırma Enstitüsü / Rize Viewed : 1420 - Downloaded : 695 The study was conducted out in Hayrat kiwifruit plantation founded in Rize Atatürk Tea and Horticultural Crops Research Institute during 2002-2003. Hayward and Bruno female cultivars and Matua and Tomuri male cultivars were tested. According to the results, cv. Bruno had earlier first leaf appearence than that of Hayward and this cultivar flowered and ripened its fruits earlier. As for male cultivars, Matua was earlier than Tomuri in terms of vegetative development and flowering. Generally, vegetative buds appeared at the beginning and end of March and plants came into flowering toward the middle of June in all cultivars. In female cultivars, plants flowered at the beginning of June and fruits could be harvested toward to the end of November. Defoliation was observed in all cultivars toward the middle of December. Mean fruit weight was found to be 90-110 g for Hayward and 70-80 g for Bruno. It was also determined that fruit hardness was 7.5-9 kg for Hayward and 7.5-8 kg for Bruno at harvesting. The WSDM value which was 9.5- 10 % for both cultivars at harvesting reached at 13-14 % level at ripening. Keywords : Kiwifruit, Rize, Phenologic, Pomology