5 trees in my yard have been decimated by whatever is doing this. All within the last two weeks. I have never seen any insects on the trees. I just come out to find the treet totally mutilated. I've also seen large trails of ants marching up this tree. I took care of the ant problem, but clearly the ants didn't do this. I suspect the ants were going after aphid honeydew, but my googling doesn't lead to this being aphid damage. Please help. What is doing this and what do I need to do to slaughter them?