Help for my magnolia pease!?

I planted a Magnolia soulangia in my garden a few years ago. Every year something eats large holes in the leaves and sometimes leaves them that they are almost just a skeleton. I can see no sign on bugs or caterpillars or snails on the tree so not sure how to treat it. Have any of you had a similar problem and do you have any suggestions what I should do?

Help for my magnolia pease!?
I had the same problem.I lost nearly all the leaves on my magnolia's last spring. At first i couldn't see any pest, but on closer inspection I found bright green mini caterpillars. I used a white oil spray and they were gone almost straight away. You may need to re-apply though.
Reply:It could be grasshoppers.Use NOLO bait in June. It seems to be the only thing that works.You should have already fed the tree in Sept. Keep it uniformly watered. Feed after it blooms%26amp; again in June.Holes in leaves won't kill the tree; it is just unsightly.
Reply:this would moore that likely be a slug, mostly they come out at night. you can buy slug pellets or sprinkly some salt around the plant, not on it . and this should keep them at bay.
Reply:It could be Capsid Bug, they are quite hard to see, but will leave the leaves like skeletons, I find if I give the shrub a shake some usually fall to the ground. If it is this bug, you will need to spray with a general bug killer.