Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 1
Written by Anca Maria CHIOREAN, Zsolt JAKAB- ILYEFALVI, Smaranda ROŞU-MAREŞ
Supplying the trees with the optimal amount of nutrients is very important in order to obtain high quantity and high quality yields every year. Prohexadione-Ca is a dual-acting substance that is both a growth regulator and an activator of the natural defense mechanisms of apple trees against pests and diseases. The influence of this compound combined with radicular or foliar fertilizers was evaluated in three apple cultivars:ʻIdared’, 'Generos’ and 'Florina’ grafted on medium vigour M26 rootstock. The applied technology in the experimental plot included chemical treatments against the main pests and diseases which commonly affect apple orchards in Northern Transylvania. Different fertilization methods combined with this growth regulator led to a reduction of length of the terminal shoots with direct influence on labour costs and efficiency of orchard management. The results obtained during 2019-2022 revealed the benefits of supplying apple trees with foliar and soil fertilizers for the cultivars to maintain a high productive potential.
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