Top working method and bloom density of pollinizers as productive determinant for spur type apple (Malus x domestica Borkh.) cultivars

► Top working with chip budding in fall, late winter and summer gave higher success. ► 'Manchurian' crab and 'Stark Spur' were very good pollinizers for 'Oregon Spur'. ► Pollinizer bloom density showed positive correlation with fruit set of 'Oregon Spur'.