The 'Granada' peach presents, in most years, low fruit set in the main producing regions of southern Brazil. Among the factors that can act negatively about this peach variety production detaches the lack of hibernal cold for buds dormancy liberation, as well as the occurrence of nutritional deficiencies. So, this work aimed to evaluate the effect of different concentrations and times of application of hydrogen Cyanamid (CH) + mineral oil (OM) and boron on the phenology and production of peach trees, cv. Granada. The experiment was carried in Charqueadas city, in the Central Depression region of Rio Grande do Sul State, Brazil. It has been evaluated the phenology, the floral bud dropping and the intensity of blooming, the fruit setting and the physic-chemistry quality of the fruits. The application of 0.4 % CH + 1.0 % OM on dormant buds stimulated the flowering and sprout, but reduced the production of plants. Spraying buds and flowers with 220 mg.L-1 of boron increased the production of the plants. Simultaneous applications of 0.25 % CH + 0.8 % OM at the beginning of swelling buds and 0.2% of 340 mg.L-1 of boron at full blooming increased the production of plants. Isolated application of 0.25 % CH + OM at the beginning of swelling buds reduced the total soluble solids level and when applied simultaneously with boron, in the full blooming, reduced the fruit acidity.
Prunus persica (L.) Batsch; Dormex®; fruit set; yield
