we used to farm mangos, lychees, and avocados (among other crops) and
never did pound nails into the mangos - like thunder stated,
especially in a residential setting, they're inconsistent and have a
lot to do with the weather (and, recently, pest management (get all
kinds of "new" bugs around) as well as irrigation practices. on the
farm we used to flood irrigate the trees twice a year (beginning of
summer and after summer) for a day each time...trees (number 9 and
haydens) were very large and consistently produced excellent quality
and quantity of fruits annually. another thing i remember is that we
never fertilized the trees, just left whatever fruits and leaves drop
and decompose around the tree. when i moved to oahu, i had 2 trees in
my yard which were watered every couple of days with the lawn...lousy
crops as compared to the farm...and i noticed the same with my
neighbor's trees. in any case, "nailing" and/or girdling the bark of
lychee trees is a common practice and it does work on these trees.
the factors associated with this is that it shocks/forces the trees
into retaining its water and nutrients in the canopy, forcing the tree
to produce more flowers and the increased likelyhood of pollination.
whatever, but all i know is that it works on lychees. i also had 3
lychee trees in my yard that, according to neighbors, never did
fruit...i girdled and nailed the trees and the next year: bumper crop.
i don't know, never did this with the mangos, you can try, might work,
might not...what the hell....
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