S. Malchev, S. Savchovska* Fruit Growing Institute – Plovdiv, 12 Ostromila Str., 4004 Plovdiv, Bulgaria (Manuscript received 31 August 2020; accepted for publication 16 October 2020) Abstract. The periods with continuous freezing air temperatures reported during the spring of 2020 (13

P. Kaymakanov* Department of Fruit Growing, Faculty of Viticulture and Horticulture, Agricultural University Plovdiv, 12 Mendeleev, 4000 Plovdiv, Bulgaria Abstract. In the period 2012 – 2013 the influence of 3 interstocks on growth and fruit bearing of the sweet cherry cultivar

G. Dobrevska Abstract. The vegetative manifestations of three cherry clonal rootstocks Merisier F12.1, Saint Lucie GF 64 and Gi-Sel-A 5, grafted with the variety Summit, were studied in nursery. Merisier F12.1 and especially Gi-Sel-A 5 have earlier attenuation in the pace of the roots