Help with a tree?

leave it be

If the bark has been incised the entire circumference of the tree it will die. If the damaged area is less than 25 percent of the circumference of the trunk, the wound should gradually heal over and no permanent injury should result. If the damage involves more than 50 percent of the circumference, the tree may be seriously reduced in vigor. It may lose branches and become quite unsightly.

Bruised and peeled bark should be treated to promote rapid healing. Trim around the wound to sound tissue on each side. Use a sharp knife and do cut any deeper than necessary. The top and bottom should be rounded instead of forming a sharp point. This will facilitate movement of moisture and nutrients around the damage area. When done properly, healing will occur completely around the wound.

There are a number of products out there to 'seal' wounds like this. In general however, their use is a bad idea, as it promotes fungal growth, and rot. The best thing to do, unfortunately is keep a close eye on it...make sure grass surrounding the tree base doesn't get too tall (crowding the base with moisture)...

And obviously be careful when using a mower or line-trimmer.

Eventually the tree will cover the wound. It might be helpful to see WHAT animal did this...Deer are hard to deter without serious fencing.

I think everyone else covered how to fix.

To prevent this from happening again you may want to pick up some fox urine. You can usually find this at sporting goods stores. It deters deer and other creatures from eating your plants. Sprinkle this around the perimeter of your beds or planting areas.

use chicken wire .to fix the wound check out bark tracing.to hard to explain here.a picture is worth a thousand words.

They sell bark wrap in retail stores. You can use burlap and duct tap. Apparently it is a sweet tree, that attracks them.

as long as it's not in a circumference, all is good