Abstract
Softwood cuttings of rootstocks M 26, M 104 and M 106 were investigated under ordinary propagating greenhouse conditions without basal heat or mist. Rooting was stimulated most effectively by indole-3-butyric acid (IBA) at a concentration of 0,5% in a mixture of talc with a commercial powdered fungicide, Captan (6:4 wt/wt). Wounding of the basal part of cuttings increased the percentage of rooting and increased the number of roots per cutting and the length of the root system. Captan restricted decay of cuttings, promoted rooting, probably indirectly, and improved the root-system quality. The best results obtained were 91%, 68% and 100% rooted cuttings for the clones M 26, M 104 and M 106, respectively. The time of cuttings collection (July – September) had no significant effect on their rooting.
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