Four Eucalyptus grandis clones were used to evaluate the effect of IBA application (0, 1000, 2000 and 4000 mg/l) on the survival, rooting and vigor of microcuttings and minicuttings. Regarding greenhouse exit survival and shade house exit rooting and survival at 50 days of age microcuttings and minicuttings, diverse clone responses were observed in relation to IBA dosages. However, for all the tested clones no growth regulator effect was observed on height and root collar diameter for both microcutting and minicutting techniques. Increased rooting indexes and survival of the minicutting were observed in the dosages of 1000 and 2000 mg/l IBA in most of the clones. In general, no effect was observed on rooting and survival of the microcuttings; however similar or higher values to those obtained by minicutting technique were observed suggesting greater microcutting vigor, as compared to the minicutting.
Minicutting technique; microcutting technique; vegetative propagation
