In spring 2018, we conducted an experiment on four different cultivars of apple trees, 'Idared', 'Carjevič', 'Elstar' and 'Golden delicious'. We examined the development of abscission and fruitlet growth. We observed the effect of bloom and fruitlet position on the flower stem, on natural abscission. We conducted seven measurements in 69 days. Weather conditions played an important role. Between 27 May and 10 June there was hail but this didn't affect the progress of experiment. Inflorescences with 5 and six blooms were predominant. The progress of abscission showed that 'Idared' and 'Carjevič' cultivars reached the peak of falling 13 days after full bloom (DAFB). 'Elstar' and 'Golden delicious' cultivars reached the peak of falling 22 DAFB. Cumulatively, 91,2 % of fruits fell off regardless of the cultivar. The abscission regarding the position of fruitlet analysis did not show specific differences between different positions. The fruitlet growth proceeded according to the model of growth which is typical for apples. The growth of the central fruitlet (K1) was faster in the beginning, the lateral fruitlets (L) caught up later. For more accurate knowledge of fruitlet fall dynamics, the experiment should be observed for at least a year.
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