I've tried a lot of things to protect my gardens and fruit trees from squirrels. So far the only thing that's worked is catching them in Havahart traps and relocating them. Putting chicken/aviary wire cylinders around vegetables in containers, that also works...but trying something similar on fruit trees (metal cages around clusters of fruit) has only resulted in the cages (and fruit and branch/spur) being yanked off the tree and left on the ground. I've even tried dusting chile powder on some peaches...squirrels are supposed to hate it, and also don't like to walk on it. Didn't work for my squirrels.

I'm also about to order a small electric fence (battery operated) kit and will try to electrify individual trees at their bases (most of my trees are young and small). I'm planning to circle the tree with a low (24 inches or so) chicken wire fence and run an electric wire just above it. I'll ground the chicken wire and when the squirrel climbs up the chicken wire and reaches to the electric wire...he'll get the message. I've read that their tails will spin like a propeller when so stimulated.

Last year on one young peach tree with the fruit wrapped a plastic netting bags, there were zero peaches left for me. When the tree next to it ripened it's fruit, it had two Havahart traps at it's base...in two weeks I caught eight squirrels and had every peach to myself.