ISHS Acta Horticulturae 149: Flowering and Fruit Set in Fruit Trees
EFFECTS OF GA 3, BA AND GROWTH RETARDANTS ON FRUIT SET IN THE PEAR CULTIVAR 'DOYENNE DU COMICE' |
| Author: | R.D. Marcelle |
| Abstract:
In the pear cultivar 'Doyenné du Comice', the problem of fruit setting after growth regulator application has been re-examined. GA 3, BA and some growth retardants have been used, alone or in combination. The experiments were done on shoots bearing a limited number of flower clusters and not on whole trees. GA 3 alone or in a mixture with BA could largely increase the initial fruit set in this pear cultivar. After June drop, however, no significant difference could be found between the treatments. The number of well developed seeds decreased after GA 3 treatment; this effect seemed to be reversed by BA in the 1983 experiment. In our experiments of two years, no significant effect of the growth retardants chlormequat and mepiquat could be demonstrated. The same absence of effect was recorded in 1983 by using a seaweed extract containing boron. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
