Neal, I have tried that and they just abandon that little area and dig a new hole a foot away. I don't think they will go far since it is winter. I decided that I will have to resort to poison and if that fails, to a professional exterminator. I can take steps to repel them in the spring, but for now I will just have to kill them in order to preserve my tree. I hate to do that, but nothing else has worked. I ordered a sort of pipe-like bait station to make sure other critters don't get into it, and a specific bait for voles...should arrive next week. Crossing my fingers it will work. If it does, I will share the method on ATP.
