I planted a black mulberry in February. It was basically a "whip" with no
side branches.
I dug a 3ft planting hole long before it arrived, which was filled with good
topsoil, compost and manure. I added a bit of gtowmore and let it all
stand for six weeks.
After planting it was very slow to produce leaves - which I had been warned
to expect.
Eventually it produced half a dozen side branches.
A couple of months ago it began to die back from the tip. After it had died
back to below the first branch I cut the tip back and treated it with
arbrex.
Then the leaves on all but two branches began to die. Their branches
blackened at the joint with the trunk and dropped off.
I now have a whip with a withered tip and one healthy branch just above the
ground and a stump with a couple of deformed leaves about a foot from the
top.

Is there something I can do to save it - and if so, is it likely to produce
new leaders or will it develop as a bush?