ISHS Acta Horticulturae 329: VII International Symposium on Plant Growth Regulators in Fruit Production
IMPROVED FRUIT SHAPE AND LESS RUSSETING OF APPLES BY USING GIBBERELLINS |
| Authors: | T. Bubán, M&a.;r. Rátz, L. Oláh |
| Abstract:
Treatments with GA 4+7 (5 to 10 ppm) at anthesis and petal fall, too, improved the shape of Starking Delicious apples in terms of their length-to-diameter i.e. L/D ratio. Percentage of elongated fruits (with L/D ratio of 0.93 or more) has also been increased in treated trees up to 71 % from 36 % in untreated ones. The same treatments carried out at petal fall and three times again in Golden Delicious orchard resulted in considerable decrease in russeting. As much as 48 % of fruits were free of russeting as against only 16 % in untreated trees. There was no influence on return bloom in trees of these cultivars, however, fruit set was reduced moderately in trees of the cv Golden Delicious. | |
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