An experiment was conducted in order to verify different concentrations of IBA (indol butiric acid) and different substrates in the rooting of herbaceous cuttings of the rootstock 'Mirabolano'. The cuttings were obtained from plants at Wenceslaw Bráz-MG and taken, under low temperature, to the EPAMIG's Experimental Farm in Maria da Fé-MG. The cuttings were standardized with one pair of leaves, cutted on half and 12 cm of lengh, treated with different concentrations of IBA (0, 1000, 2000 and 4000 mg.L-1) and taken to wark-benchs filled with different substrates (sterilized sand and vermiculite), under shadow (50%) and humidity control. After 60 days, the rooting percentage, number of leaves, roots average size and roots dry matter were evaluated. The vermiculite permitted the obtaining of cuttings with larger average length of roots and higher rooting percentage. For other characteristics, there was not difference between the results usings sand or vermiculite. The concentration of 2000 mg.L-1 of IBA promoted better results then the others, for all the evaluated characteristics.
Prunus; IBA; propagation; rootstocks
