Can you kill a Chinese Pistachio tree by overpruning?

Question

My gardener pruned my Pistachio tree in December/January and it continues to look bare. Can it be that the tree was overpruned?

Answer 1

Overpruning may not kill a tree directly, but over time, the tree usually suffers from disease, weak structure, etc., and succombs. Never prune more than one-third of the canopy at one time.

These articlea may help:

https://www.gardeningknowhow.com/ornamental/trees/chinese-pistache/growing-chinese-pistache-tree.htm

http://cesolano.ucdavis.edu/files/77739.pdf

https://www.gardeningknowhow.com/ornamental/trees/tgen/damage-from-over-pruning.htm