Acro's tissue loss

[palyam]

I'm experiencing this problem on two of my acro's.

The recession is in the middle of one of the branches, and when I used turkey buster to remove it more tissue came of.

parameters are stable, rest of the acro's doing fine without any signs

what shoudl I do?.. I tried to look for bugs but didn't see any

 

[Ranchero]

Try and remove as much of the healthy pieces as you can or it will spread and kill off the whole colony.