The objective of this work was to evaluate the effect of the indolebutyric acid (IBA) on the rooting of semi hardwood cuttings of grapevine rootstock 'VR043-43' (Vitis vinifera x Vitis rotundifolia). The experiment was set up at the Universidade Federal do Paraná, Curitiba, PR, Brazil, in December/2004 to January/2005. The IBA concentrations were 0; 1,000; 2,000 and 3,000 mg L-1, and the cutting base was dipped in the solution for ten seconds. After 40 days under intermittent mist condition the cuttings were evaluated. The results showed that higher percentage of rooted cuttings was obtained with 0 mg L-1 of IBA (92,5%). The percentage of death cuttings increased with the IBA concentrations and decreased leaf retention. There was an increase in the root number per cutting with the increase of IBA concentrations, but there was no significant difference in the fresh weight roots matter and dry weight of roots matter between IBA treatments.
IBA; vegetative propagation; cutting; Vitis
