SOME EFFECTS OF AMINOETHOXYVINYLGLYCINE, 6-BENZYLAMINO PURINE AND GIBBERELLINS ON FRUIT SET AND VEGETATIVE GROWTH OF APPLE
Aminoethoxyvinylglycine (AVG) applied as a foliar spray increased the set of self- and open- pollinated 'Delicious', and open pollinated 'Golden Delicious' flowers. Applying 6-benzylamino purine (BA) and gibberellins A4+A7 (GA4+A7) with the AVG also increased set of 'Delicious' as compared to AVG or the other growth regulators alone. AVG increased fruit set on 'Golden Delicious' when applied from 7 to 23 days post bloom, and counteracted the thinning action of high rates of GA4+A7 on this cultivar. GA4+A7 applied at various post bloom concentrations and timings either had no effect on set, increased set, or reduced set. Several interactions and effects of AVG and GA4+A7 were found on 'Golden Delicious' set, seed content and yield depending on concentration and time of post bloom application. AVG at low concentration increased lateral growth and total shoot growth on apple seedlings and two cultivars in the nursery. The addition of BA and GA4+A7 or gibberellic acid significantly increased lateral extension and total growth. High concentrations of AVG reduced total growth.
Edgerton, L.J. (1981). SOME EFFECTS OF AMINOETHOXYVINYLGLYCINE, 6-BENZYLAMINO PURINE AND GIBBERELLINS ON FRUIT SET AND VEGETATIVE GROWTH OF APPLE. Acta Hortic. 120, 125-130