08. Effect of IBA (Indole Butyric Acid) levels on the growth and rooting of different cutting types of Clerodendrum splendens
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Abstract
An experiment to evaluate different IBA levels and cutting types for achieving growth and rooting of Clerodendrum splendens was studied at Ornamental Horticulture Nursery, Department of Horticulture, The University of Agriculture Peshawar, Pakistan during the year 2012. In the experiment two types of cuttings were used i.e. stem cuttings and root cuttings and were treated with 0, 10, 20 and 30% IBA. Cuttings were then planted in polythene bags crammed with the mixture of clay, FYM and sand with the ratio of 1:1:1. IBA with the level of 20% showed best results regarding number of leaves per plant (14.0), number of roots per plant (9.8), root diameter (2.4mm) and survival percentage (60.0%). A significant increase in sprout length (29.1cm) and root length (24.8cm) were observed in cuttings treated with 10% IBA level over the control. Among cuttings, stem cuttings gave good results in all parameters as compared to the root cuttings. Interaction revealed that stem cuttings proved superior when treated with 20% IBA followed by 10% IBA, while root cuttings did not need IBA for rooting and resultant growth as these cuttings rooted and grew well without IBA. Hence it is recommended that stem cuttings need IBA at the rate of 20%, while root cuttings should be used without treating with IBA.
Keywords: IBA; Cuttings; Clerodendrum splendens