Carrot wood tree roots sprounting
About 4 years ago we had our mature carrot wood tree removed. Yesterday, we noticed tiny sprouts in the area where it grew, so we dug down and traced the sprouts to a huge root about 6 inches in diameter.
A large section of the root is now exposed but there is more we cannot see. Other than digging up the whole area to find and remove every root, is there anything we can do to this one to force all of them to die? Growing nearby, there's a new dwarf Navel orange and a handful of other plants I'd rather not have to move unless absolutely necessary.