Mulenok Y. Productivity of winter apple varieties depending on the timing of contour pruning in the Right-bank Forest Steppe zone of Ukraine

The object of study - the process of growth and fruiting of apple varieties Gala (Mitchgla), Golden Delicious (clone B) and Jonagold (clone Wilmut) on rootstock M.9 T337, depending on the timing of contour pruning of the crown. The subject of research - elements of the technology of growing apple fruits on a dwarf rootstock M.9 T337. Research methods - general scientific: dialectical - observation of crop formation, methods of hypotheses - drawing up schemes of experiments, experiment - field and laboratory researches, analysis and synthesis - formation of conclusions and generalizations, and also special: laboratory - physical and chemical researches and estimation of commodity quality, production - production tests, mathematical statistics - processing of experimental data, determination of reliability of results. Scientific novelty of the obtained results. For the conditions of the Right-Bank Forest-Steppe of Ukraine for the first time elements of contour pruning of the crown of trees of perspective winter apple varieties Gala (Mitchgla) and Golden Delicious (clone B) were developed in the rootstock M.9 T337, in particular in the pink cone phase. Yankee) and for the first time - after harvest (with manual completion of the inter-tree space); contour pruning of Jonagold (Wilmut) plantations in the pink cone phase and after harvesting was proposed for the first time. The influence of pruning times on the illumination of the crown, phytometric parameters of trees, plant yield, marketable quality and physico-chemical parameters of fruits and economic efficiency of apple production is substantiated.