Effect of Indolfbutyric Acid. Girdling. And Wounding on Rooting of Artocarpus Heterophyllus L. Cuttings

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1986

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Effects of girdling, wounding, different concentrations of indolebutyrlc acid (IBA), and stem maturity on the rooting of jackfrult stem cuttings under intermittent mist were evaluated. Stems were girdled and allowed to remain on the trees for 40 days. Girdled and non-girdled cuttings were treated with 0, 5000, and 10000 ppm IBA and Inserted in a 1 vermicullte: 1 perlite (by volume) mixture. Two wounding cuts were made at the base of half of the cuttings. Wounded and non-wounded cuttings were treated with IBA and placed in the medium described earlier. In the absence of IBA there was no rooting on any cuttings. Significant girdling by IBA by stem maturity Interaction was observed with respect to rooting index, percent rooting, length of primary roots, fresh and dry weights of roots, and dry matter content of roots. Wounding did not increase the rooting of cuttings. There was no significant difference in rooting percentages of wounded and non-wounded cuttings between 5000 and 10000 ppm IBA. However, girdled cuttings of semi-hardwood stems gave the highest percentage of rooting (77%) with 10000 ppm IBA. Induction of primary roots per cutting Increased with IBA. Girdled cuttings of semi-hardwood stems produced a greater number of vegetative shoots than non-girdled cuttings. Higher concentration of IBA decreased the number of vegetative shoots per cutting. Total sugar and starch content in girdled cuttings was significantly higher than that of the non-girdled cuttings.

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