Effects of Wounding, IBA and Basal Trimming on Rooting of Boxwood Cuttings

Abstract

Wounding, indole butyric acid (IBA) and trimming of cuttings to a basal node were evaluated for their effects on rooting of Buxus sempervirens L. (American boxwood), B. sempervirens L. ‘Suffruticosa’ (English boxwood), B. microphylla var. koreana Nakai. (Korean boxwood), and B. microphylla var. japonica (Müll. Agr.) Rehd. and Wils. (Japanese boxwood) cuttings. Rooting of all cultivars was improved by a 5 second dip in a 0.4% aqueous solution of the potassium salt of IBA. Wounding the basal end of the cuttings only improved rooting for Korean and Japanese boxwoods. However, the combination of wounding and IBA dip gave the best results for all cultivars. Trimming the cuttings to a basal node was beneficial only to Korean boxwoods.

The effects of different rooting temperatures and phytohormones on the propagation of boxwood cuttings

“…As a result of the study, higher results were obtained in phytohormone-treated cuttings compared to control cuttings in terms of RP, RL and RN. Banko and Stefani (1986) reported that the longest root lengths obtained in B. sempervirens were 2.40 cm (nodal cuttings) and 2.60 cm (internodal cuttings) in the combination of wounding and IBA treatment. For B. sempervirens semi-hardwood cuttings, Vieira et al (2018) obtained the highest number of roots and the longest root length with 3.73 roots and 2.55 cm, respectively, in the control cuttings, while IBA 6,000 mgL -1 took the second place with 3.66 roots and 2.45 cm.…”

“…In the study conducted by Banko and Stefani (1986) on the cutting propagation of Buxus sempervirens, nodal (cuttings were cut just below a node) and internodal (cuttings were cut above a node) cuttings were used. They stated that the highest rooting percentage was determined as 78.5% in nodal cuttings that wounding and IBA combined application were applied.…”

“…sempervirens, half the time required for rooting is saved compared to the study conducted by Vieira et al (2018), using B. sempervirens semi-hardwood cuttings. In addition, it has been determined that high rooting success can be achieved with different auxins (IAA and NAA) and low concentrations, except for IBA used in conducted studies (Banko andStefani 1986, Vieira et al 2018), and thus different alternatives have emerged for phytohormone use. As a matter of fact, in a study, it was reported that the re-establishment of natural boxwood forests can be contributed by planting the seedlings that will be obtained by propagating with the cuttings taken from the surviving and resistant boxwood individuals in areas where there are no factors that cause boxwood blight (Özkaya 2020).…”