The work evaluated the yield, fruiting time and harvest period of the peach and nectarine cultivars, with and without hydrogen cyanamide, in two crop cycles (2009 and 2010). The experiment was carried out in the School of Agronomical Sciences (FCA), São Paulo State University (UNESP), Botucatu Campus, SP, Brazil, located at 22º51' 55" S, 48º27' 22" W and 810m altitude. The predominant climate in the study region is described as a warm temperate climate (mesothermal), with rainy summer and dry winter. The spraying with hydrogen cyanamide and mineral oil showed in the earlier harvest dates for all cultivars evaluated. Also, there was one concentration on the yield period, decrease on the crop cycle and increase the yield productivity. The evaluation of the pruning until harvest time with free blooming showed that the earliest cultivars were: Precocinho (81.5 days) and Conserva 693 (87 days). The latest were: Turmalina (141.5 days) and CP 951 C (120 days). With the spraying with hydrogen cyanamide and mineral oil the pruning until harvest time showed the earliest cultivars: Precocinho (87.5 days) and Sun Blaze nectarine (95.5 days). The latest were: Diamante Mejorado (126.5 days) and CP 951 C (120 days). The highest yield were observed in the Turmalina (20.2 kg plant-1), Conserva 693 (20.75 kg plant-1) and Aurora 1 (15.65 kg plant-1) cultivars.
Prunus persica var. nucipersica; Prunus persica var. vulgaris; épocas; clima
