VARIETY INFLUENCE ON ALTERNATE BEARING REACTIONS IN DOMESTIC PLUM
Results of many studies on different species (Apple, Pear, Prune) show that this phenomenon is due to excessive fruit formation, this excess inhibiting flower induction of following cycle. Complete removing of flowers or fruitlets increases greatly fruit bud induction in the same year. The mechanisms of this action are not yet well known.
Generally, alternate bearing is a succession of a very poor or no production year after a year of excessive production in fruit number (very small fruits).
Like in many fruit species, alternate bearing exists in domestic Plum. We have tried to precise, on this species, reproductive cycle phases concerned by this phenomenon and the possible variety habits.