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Effects of temperature, shoot-tipping, and carbaryl on fruit set of apple trees


, : Effects of temperature, shoot-tipping, and carbaryl on fruit set of apple trees. Acta Horticulturae (80): 207-211

Young Golden Delicious apple trees grown in pots were exposed to different temperatures during 1- or 2- week periods between bloom and the end of June drop. Trees were placed in three growth rooms within a greenhouse at the following temperature levels: 12-13 deg , 16-17 deg , and 19-21 deg C. Selected flowers were hand-pollinated. Beehives were placed in the greenhouse to ensure good pollination of all flowers and a satisfactory initial fruit set was obtained.

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Related references

Vang Petersen, O., 1990: Calcium for apple trees. I. The influence of shoot tipping on the fruit content of calcium. A 4-year-trial is reported. In mid-July, all laterals were shortened by 1 cm on trees of the cultivar Cox's Orange Pippin receiving normal [unstated] and extra amounts (46.5 kg/ha) of nitrogen. No effect of shoot tipping was observed on fruit...

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