EFFECT OF GROWTH REGULATORS ON 'ANNA' APPLE FLOWERING
In an one-year-old 'Anna' apple orchard, on 'EM-2' rootstock, drip irrigated, were established the following treatments: 1) Control; 2) Promalin 25 ppm + BNOA 5 ppm; 3) Promalin 250 ppm + BNOA 50 ppm; 4) Promalin 250 ppm and, 5) GA3 200 ppm + BA 300 ppm + BNOA 50 ppm. The treatments were applied in two distinct periods: in the beginning and at full flowering, in a randomized block design with four replicates.
By statistical analysis it was shown that there was no difference between the two treatment periods. The global analysis showed that both treatments 3 and 4, with bigger fruit set (32.5 and 31.5 fruits, respectively) were different from treatment 5 and control (9.5 and 11.5 fruits, respectively). The parthenocarpic fruits showed an elongated form and ring shape near the apical region.