Effect of genotype and rooting hormone on rooting of Litchi chinensis "microcuttings" - preliminary results

K. Hannweg, A. Sippel
Clonal propagation of litchi (Litchi chinensis) in South Africa is carried out primarily by air-layering, and grafting onto seedling rootstocks. However, while air-layering is the most successful method for commercial vegetative propagation of litchi, it has a number of challenges. The major limitation is the number of suitable branches that can be air-layered per tree. In the current study, leafy 'microcuttings' were rooted under intermittent mist with rooting percentage ranging from 30 to over 80%. Rooting was influenced not only by genotype but also by rooting hormone used. Just hardened-off green wood cuttings 10-12 cm in length, 4-5 mm in diameter and supporting two to three leaves, were used as cutting source. Leaves were trimmed before the base of the cuttings were dipped in a commercial rooting preparation containing indole-3-butyric acid in powder form or a liquid commercial preparation containing a indole-3-butyric acid/1-naphthaleneacetic acid combination. A well-drained rooting medium was used and cuttings rooted within seven to nine weeks with roots being visible at the base of the seedling tray cells. Rooted cuttings were transplanted into 2-L potting bags for acclimatisation and establishment. The resulting plants were upright in stature and uniform in growth.
Hannweg, K. and Sippel, A. (2020). Effect of genotype and rooting hormone on rooting of Litchi chinensis "microcuttings" - preliminary results. Acta Hortic. 1293, 85-90
DOI: 10.17660/ActaHortic.2020.1293.12
clonal, cuttings, lychee, propagation, rooting

Acta Horticulturae