Propagation of some apricot clonal rootstocks and their influence on growth of nursery trees
The rooting ability of rootstocks Myrobalan 29C (M29C), Pumiselect and Ishtara propagated by hardwood cuttings and the vigor they induced to the scions of four apricot cultivars (Hargrand, Bergeron, Goldrich and Pinkcot) in the second year nursery field were studied in the period 2012-2014. Hardwood cuttings of all tested rootstocks showed a very high percentage of rooting, over 99%. Between 93.9 and 95.2% of the rooted cuttings reached a thickness of the annual shoot allowing performance of T-budding in August. All three rootstocks provided good development of the scions. At the end of the second year, the trees on Pumiselect rootstock had the lowest thickness. Greater thicknesses of both rootstock and scion were recorded in trees budded on rootstocks M29C and Ishtara, but no consistent differences between these rootstocks were found. The trees of the four tested apricot cultivars budded on rootstocks M29C and Ishtara have greater height and total scion growth than trees of these tested cultivars on Pumiselect rootstock. During the study period in the second year nursery field no consistent differences were noted between rootstocks M29C and Ishtara regarding the growth characteristics they induce to the tested apricot cultivars.
Yordanov, A.I., Tabakov, S.G. and Kaymakanov, P.V. (2018). Propagation of some apricot clonal rootstocks and their influence on growth of nursery trees. Acta Hortic. 1214, 83-88
hardwood cuttings, rooting, vigor