I have had bears tear up several tree tubes this year. I think they are going after the wasp larvae, which is why I try to spray some of my imidan and imidacloprid mixture down inside the tube when I spray the tree. Split toe, I saw quite a bit of poke berry in your picture, was any of that right by the destroyed tree and tube? I know the Bears are working the poke berries hard right now. I tried to inject the poke berry stems with 41% glyphosphate that are right next to my trees but the 16 ga needle stops up. Poke berry is a great wildlife plant when they are in the right spot, 30% protein this time of year according to Craig Harper at UT. BECAUSE OF BEARS, THE ONLY FRUIT I CAN GROW IS PERSIMMON. At least I hope I can. Does anyone know of a way to prevent bear damage to bearing pear and apple trees? I tried nasty barbed wire 6" apart spiraled around 4 6' t-posts around each tree. I tried a 3 strand electric fence around one tree last year. I haven't tried an electrified tube of 2x4" mesh welded wire around each tree, but I saw where Dr C Dahlke had used that on raccoons.