Maraisa Hellen Tadeu

Produção de mudas de framboeseira negra por diferentes métodos de propagação vegetativa

Aiming to develop a propagation protocol through black raspberry (Rubus niveus) cutting and layering, the objective of the present research was to quantify the rizogenic potential of stems and roots cuttings, point and air layering of this specie. In the first experiment, the stems and roots cuttings of 10 cm of length were treated with different concentrations of indolbutyric acid (IBA): 1000, 2000, 3000 and 4000mg L-1 for 10 seconds. In the second experiment, the stems and roots cuttings of black raspberry were cold storage by 10, 20 and 30 days, and control without storage. In both experiments, the stems cuttings were buried 2/3 length in the vertical position and the roots cuttings were totally immerged in the horizontal position, using the vermiculita as substrate, in greenhouse with 50% of light. After 60 days, they were evaluated. In the third experiment, the point and air layering were accomplished in the medium portion of the branches, being applied in the place different concentrations of IBA (0, 1000, 2000 and 3000mg L-1) and soon after, they were involved by the following humidified pinus substrate. After 45 days they were removed for the evaluation. It can be concluded that the stems cuttings presents better results in comparison by roots cuttings, owing cold storage and without IBA; the point layering promoted larger emission of roots in comparison to air layering.

Poda drástica de verão e produção de cultivares de amoreira‑preta em região subtropical

The objective of this work was to evaluate pruning managements of blackberry ( Rubus spp.) cultivars, subjected to drastic summer pruning, in subtropical regions. The experiment was carried out in a randomized complete block design, in a 7x2 (pruning x cultivars) factorial arrangement, in the municipality of Lavras, in the state of Minas Gerais, Brazil. The Comanche, Caingangue, Choctaw, Tupy, Guarani, Brazos, and Cherokee cultivars were used, receiving conventional pruning (control) and drastic summer pruning. Phenological, vegetative, and productive data were evaluated on the 2012/2013 and 2013/2014 production cycles, as well as the fruit physicochemical attributes and disease incidence in the last production cycle. Drastic summer pruning increases the production of cultivars in subtropical regions. There is no difference in the quality of fruit harvested from plants subjected to the evaluated pruning systems. Drastic summer pruning is not effective in the reduction or the control of diseases.

Enraizamento de estacas caulinares e radiculares de Rubus fruticosus tratadas com AIB

The objective of the present work was to evaluate the rizogenic potential for stems and root cuttings of Rubus fruticosus treated with indolbutyric acid. Roots and stems cuttings of this specie were collected in March, and had their basal portions treated with different concentrations of indolbutyric acid (IBA) (1000, 2000, 3000 and 4000 mg L-1) for 10 seconds. The control treatment used only water. The stem cuttings were planted with 2/3 of their length in the vertical position and the root cuttings were totally covered in the horizontal position, using vermiculite as substrate, in screenhouse with 50% of shade. After 60 days, the stem cuttings presented better results for seedling formation, without IBA.