ISHS Acta Horticulturae 800: X International Pear Symposium
EFFECT OF BIOREGULATOR APPLICATIONS ON THE FRUIT SET IN 'ABATE FETEL' PEAR TREES |
| Authors: | P. Vilardell, J.M. Pagés, L. Asín |
| Keywords: | Pyrus communis, Promalin, Regalis, fruit set, 'Abate Fetel' |
| Abstract:
The aim of the study was to increase fruit set and subsequently yield in the cultivar 'Abate Fetel'. Bioregulators NAA + NAD, GA4/7 + 6-BA, Paclobutrazol, Prohexadione-Ca and several combinations were tested. The study was carried out in three 'Abate Fetel' pear orchards during the period 2004-2006. The most effective strategy was the combination of GA4/7 + 6-BA sprays during bloom time and a Prohexadione-Ca spray 15 days after petal fall. With this strategy a 40% increase in yield and a 55% increase in the number of fruits per tree were recorded. However, single applications of Prohexadione-Ca, GA4/7 or Paclobutrazol showed important differences in yield increase which were related with weather conditions during the flowering period. The mixture ANA + NAD did not increase fruit set. | |
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