Promotive Effects of Auxin, Ethephon, and Daminozide on the Rooting of Protea neriifolia Cuttings1

Abstract

Abstract Terminal cuttings of Protea neriifolia R. Br. gave earlier rooting and superior rooting index values when they received basal pretreatments of combinations of (2-chloroethyl)phosphonic acid (ethephon) at 300 ppm and indoleacetic acid (IAA) at 4000 ppm followed by a commercial rooting preparation composed of 1.0% indolebutyric acid (IBA) plus 0.5% NAA diluted 1:9 and combinations of 2500 or 4000 ppm butanedioic acid mono-(2, 2-dimethylhydrazide) (daminozide) with 4000 ppm of IBA or IAA. Treatment effects were evident after 3 and 4 months while the control required 5 to 6 months for similar rooting results.