| Sumario: | The trial was made in order to observe, in a comparative test, the behaviour in field conditions of vine cuttings that are easily rooted (Vitis vinifera var. Malbec) or difficult to root (Kobber 5 BB) which were previously held under different washing periods (0, 24, 48, 72, 96 and 120 hours) o evaluate the method as agricultural practice to obtain rooted cuttings. The results obtained in percentages of rooting for the variety Malbec were higly significatives in treatments of 24 and 48 hours as well as in those periods of 48 and 96 hours for the variety Kobber. In regard to the number of roots for each rooted cutting the results were also significatives. As it hapened in other trials (Tizio et al, 1961; 1963) it is believed that not only stimulation is due to the leaching of the inhibitory substances but also to the growing factors originated, apparently, from auxinic precursors. It is pointed out the usefulness of the washing technique practique to obtain rooted cuttings.
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