Published in Scientific Papers. Series B, Horticulture, Volume LXI
Written by Gheorghe PETRE, Daniel Nicolae COMĂNESCU, Adrian ASĂNICĂ
The research conducted at the Research and Development Station for Fruit Growing Voinesti in the period 2014-2016 highlights the growth potential of apple varieties with genetic resistance to diseases such as: 'Ariwa’, 'Golden Lasa’, 'Goldrush’, 'Enterprise’, 'Inedit’, 'Iris’, 'Luca’, 'Real’, 'Rebra’, 'Redix’, 'Remar’, 'Saturn’, 'Voinicel’, all grafted on the M9 dwarfing rootstock. Orchard is defined as high density system with 2,500 trees/ha. The growth vigor of the ten years old trees, when the growth potential is well defined, indicates that between apple varieties with genetic resistance to the diseases under study, were significant differences noticed in the thickness of the trunk, size of the trees and crown volume. The production potential of apple varieties ranged from 28 to 44 t/ha in trees aged of 8-10 years. Most varieties yield over 30 t/ha, considered as apple varieties with high production potential. The level of costs for phytosanitary treatments in apple varieties with genetic resistance to disease is lower with more than 55% compared to the sensitive varieties like 'Jonathan’, 'Golden Delicious’, 'Starkrimson’.
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