The graft is the union of the scion wood (the tree-part of the tree) with rootstock (the root-part of the tree).

Grafts are easier to spot on younger trees:

than older ones:

Some are practically seamless and only detectable by the obvious contrast in wood colour and/or texture (thanks Kim for this photo!):

Take the time to find the graft on your tree. It may be high up the trunk or low and closer to the ground. In most cases the plant tag will be above it, but this isn’t always guaranteed.

Once you have identified the graft, look for any shoots growing near it, and pay especial attention to any shoots growing on the rootstock part of the graft itself:

If on the rootstock part of the graft, then these are rootstock shoots and must be removed to reduce the chance of the rootstock overtaking the entire tree: