Effect of some seed extracts and IBA on the rooting of leafy stem cuttings of Irvingia wombolu (Vermoesen)
2010
Dolor, D.E.,Delta State Univ., Abraka (Nigeria). Dept. of Forestry and Wildlife | Ehondor, N.,Delta State Univ., Abraka (Nigeria). Dept. of Forestry and Wildlife | Odiete, L.,Delta State Univ., Abraka (Nigeria). Dept. of Forestry and Wildlife
The effects of some post-severance treatments on the rooting potentials of juvenile stem cuttings of Irvingia wombolu was assessed in an experiment conducted at the Teaching and Research Farm of the Delta State University, Asaba Campus, Nigeria. Four hundred single node softwood cuttings of I. wombolu were randomly assigned to the 5 treatments, namely orange seed extract, pawpaw seed extract, African pear seed extract, 250 ppm indole-3-butyric acid (IBA) dissolved in industrial alcohol and a control (50% alcohol) applied by dipping the base of the cuttings for 5 seconds. The results displayed a pronounced effect of seed extract and IBA on the rooting percentage with IBA (34.4%) and pawpaw seed extract (26.7%) not different from each other but higher (P less than 0.001) than the control (14.8%), orange (11.9%) and African pear (10.8%). The mean numbers of roots ranged between 0.71 and 2.01 in African pear and IBA, respectively. A similar result was obtained for root length. Seed extracts and IBA did not significantly influence leaf abscission, cutting mortality and shoot formation. The results suggest the pawpaw seed extract can replace synthetic IBA in inducing rooting of cuttings of I. wombolu for mass clonal propagation.
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