Answer: Usually a distinct limited pattern such as that has a specific cause. You need to be a detective. Examine the tree carefully to see if there is mechanical damage to the branches (did a tall vehicle bump them?) or to the roots (was there root damage by digging on that side?) or was there possibly accidental herbicide damage, e.g. from a lawn "weed and feed" product being spread in a cyclone spreader? If the branches don't leaf out again, prune them off.
Q&A Library Searching Tips