large borer holes in crabapple tree trunk
I have a crabapple tree about 5 in. in diameter. There are two ~1/4 in diameter holes at the base of the trunk, about 6 in. above ground. I stuck in a length of coat hanger and the passages are nearly vertical, going toward the ground. I got the wire ~3 in. down the hole before it would not go any further.
Any ideas on what I may have here?