Crab apples are tough as nails but are very prone to insect damage. With wire damage, you should be able to see disruption in the cambium of the dead branching, as in a break in the bark. If you don't see that, look for small piles of frass that might indicate borers have been tunneling through the cambium under the bark. Based on this picture...
View attachment 437956... the trunk is still alive as you have new growth pushing. While I agree that the wiring isn't helping, excessive and very sloppy (you should take a picture to remind yourself how NOT to wire), taking the wire off now may damage those newly emerging buds, which may represent this tree's only future. If a branch is dry with crispy leaves, it's dead and I'd remove the wire and branch in one go. If the branch is alive with new growth, I'd leave it alone until the new growth has hardened off, then remove the wire
Crab apples are tough as nails but are very prone to insect damage. With wire damage, you should be able to see disruption in the cambium of the dead branching, as in a break in the bark. If you don't see that, look for small piles of frass that might indicate borers have been tunneling through the cambium under the bark. Based on this picture...
View attachment 437956... the trunk is still alive as you have new growth pushing. While I agree that the wiring isn't helping, excessive and very sloppy (you should take a picture to remind yourself how NOT to wire), taking the wire off now may damage those newly emerging buds, which may represent this tree's only future. If a branch is dry with crispy leaves, it's dead and I'd remove the wire and branch in one go. If the branch is alive with new growth, I'd leave it alone until the new growth has hardened off, then remove the wire.
Thank you for your reply. I have removed the wire as carefully as I can. All the branches are dark and brittle and without new growth… should i remove them all?