The prognostication of the rooting ability of apple stem cuttings by indices of seasonal growth of shoots

The study involved seven species and cultivars of ornamental apple trees including Malus × floribunda, M. halliana, niedzwetzkyana, purpurea, purpurea ‘Ola’, ‘Royalty’, ‘Selkirk’. average value increment, length, duration shoots’ growth were determined to characterize the seasonal shoots. percentages rooted cuttings, callus formation without roots, unviable cuttings registered for each investigated taxon. Statistical analysis was performed in Microsoft Excel 2007 following Zaitsev (1990), Atramentova & Utevskaya (2014).The total shoots studied varieties ranged from 72 (M. ‘Ola’) 118 days niedzwetzkyana); annual reached a length 213.75 mm purpurea) 448.75 increment 3.90 14.70 floribunda).The rooting ability stem limited reasonably short period cutting procedure depended on application biologically active substances, their concentrations, complexes. highest rate (33.33 %) observed ‘Ola’ after treatment its by 0.6 % indole-3-butyric acid (IBA) at end June. A slightly lower (20.00 halliana treated 0.4 IBA ‘Selkirk’ Podkorzen AB aqua Finally, 7.69 floribunda with beginning July.The prediction confirmed strong negative correlation between percentage (r = –0.88). Hence, increases decreasing growth, depending genotype.