left alone the burl sprouts will likely form a "forest" of many stems resembling a giant bush.---if that's not what you need or want, you can consider periodically pruning off the sprouts or getting rid of the tree you have and starting with a new tree. good luck.

Thanks George. Actually I gashed my hand trying to cut the sprouts below ground level. Well, I think I'm going to just let em grow and once a year shear back the sprouts to ground level. Not really looking for the large bush effect. Maybe I'll try a rooted sprout as an offset.