Induction of feathering of apple planting material
2006
Kviklys, D., Lithuanian Inst. of Horticulture, Babtai, Kauno reg. (Lithuania)
In 2001-2003 nursery trials were conducted at the Lithuanian Institute of Horticulture. The aim of the trial was to test apple cultivars and different treatments in order to increase the lateral branching of one year old trees at North European climatic conditions. Three types of cultivars were included 'Jonagold' and 'Aldas' that one year old trees easily form feathers; 'Auksis', 'Rubin'and 'Alwa' that do not form feathers during the first year; 'Sampion' and 'Ligol' that belong to intermediate type. Feathering was stimulated by growth regulator Arbolin 36SL (BA-GA3), pinching of terminal leaves or combination of both factors. Maiden trees were assessed for height, percentage of trees with laterals, number of laterals and spurs, shoot length. All treatments for cultivars with easy feathering habit stimulated production of high quality maidens. Application of growth regulator or it combination with pinching of terminal leaves were the best treatments for 'Sampion' and 'Ligol', while only pinching did not gave sufficient quality every year. In order to produce one-year-old feathered trees of cultivars that do not form feathers naturally, application of growth regulators together with pinching of terminal leaves should be applied.
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