'Boysenberry' propagation by cutting and layering/Propagacao do 'boysenberry' por estaquia e mergulhia

In order to study the propagation by cutting and layering by 'Boysenberry' (hybrid between Marionberry' e framboesa), the objective of the present study was to quantify the rizogenic potential of stems cuttings storage at cold temperature and treated with indolbutyric acid and the point layering of this hybrid. In the first experiment, the stems cuttings of 15cm of length were treated with different concentrations of indolbutyric acid (IBA): 1000, 2000, 3000 and 4000mg [L.sup.-1] for 10 seconds, and control only for water. In the second experiment, the stems cuttings of Boysenberry' were cold storage by 10, 20, 30, 40, 50 and 60 days, and control without storage. In both experiments, the stems cuttings were buried 2/3 of its length in the vertical position, using the vermiculita as substrate, in greenhouse with 50% of light. After 60 days, the rooting and sprouting percentage and the number of roots were evaluated. In the third experiment, the point layering were accomplished in the apical portion of the branches, being applied different concentrations of IBA (0, 1000, 2000, 3000 and 4000mg [L.sup.-1]) and soon after, they were buried in plastic boxes containing humidified pinus substrate. After 45 days they were removed for evaluation. It can be concluded that the stems cuttings should be stored at cold for 20 days and without IBA; the point layering promoted larger emission of roots when they were treated with 4000mg [L.sup.-1].