Abstract:
This study investigated the influence of different rooting media and indolebutryic acid (IBA) hormone
concentration on root and shoot development in stem cuttings of Warburgia ugandensis. Stem cuttings
were treated with three different levels (0.3, 0.6 and 0.8% w/w) of IBA concentration (including a controlno
IBA hormone) and propagated in three rooting media (milled pine bark, top forest soil and sand)
under non-misting propagators. Data on root and shoot development, callusing, number and length of
roots and shoots were analyzed using analysis of variance (ANOVA) and Chi square test. Callusing,
root and shoot development were significantly (p<0.05) influenced by rooting media and IBA
concentration. Milled pine bark and 0.8% w/w IBA concentration gave the highest percentages of stem
cuttings that callused, rooted and shooted (38, 37, 41% and 57, 41, 59%), respectively. Similarly, milled
pine bark and 0.8% w/w IBA concentration gave the greatest number and longest roots and shoots per
stem cutting. Vegetative propagation of W. ugandensis through stem cuttings can be appropriately
achieved by treating the cuttings with 0.8% w/w IBA hormone using milled pine bark as a growth medium.