Answer: Avocado trees are vigorous growers and can be pruned to maintain a lower, wider canopy than would usually develop. It sounds as though your tree has formed two leaders rather than one central leader. You can prune off one of the upright shoots at its point of origin and then shorten the other one so that it is just barely above the level of the rest of the canopy. If your tree already has a well defined central leader and these two upright shoots are emerging from a horizontal (or nearly horizontal) branch then they are not competing leaders but watershoots instead. If this is the case, cut them both off flush with the horizontal branch. Watershoots are vigorous upright growths that are rarely productive so losing them won't affect the ability of your avocado tree to bear fruit.
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