EFFECT OF TIME OF GA₃ TREATMENT ON ‘AGUA DE ARANJUEZ’ PEAR FRUIT SET

GA₃, at 10 ppm, was applied at three different stages of flower development.
All treatments induced parthenocarpic set, althoug application at balloon and anthesis resulted in a higher set than at petal fall.
The latter treatment produced fruits similar to seeded fruits, while the two previous applications gave elongated fruits.
No differences in maturity could be observed between treatments or when comparing with seeded fruits.

Ovule development at different floral stages has been histologically investigated.
GA₃ induced fruit set either with mature or immature embryo sacs.
The differences in % set may be related to the stage of development of the nucellus.

Flowering and Fruit Set in Fruit Trees

M. Herrero

https://doi.org/10.17660/ActaHortic.1984.149.25