[Arid_gardener] Bark Split Problem

[ginny jamieson]

      I have a chitalpa tree that overnight developed a very large bark 
split that measures about 3 feet by 3-4 inches.  The tree was planted 
about a year ago as a 36 inch box and grown into at least a 48 inch 
size by now.  Now that the bark is split, what treatment is suggested, 
especially since it is no longer recommended to use a tree paint or 
filler in the cracked area?  Is there a way to help the bark adhere to 
the tree so there is not an opening at the edge of the bark?  Would 
tracing the bark around the split with a sharp knife help?   What about 
wrapping the tree?  Currently, the cambium looks good and strong, but 
is exposed to the elements.  What are the chances of bacteria or fungi 
using the opening to attack the tree?
      Also, there is the question of why this happened.  Various reasons 
have been given:  rapid growth, a tendency for this hybrid to split, 
damage from a strong wind storm that occurred that night, being in an 
area where the winter lawn that had been seeded was  receiving multiple 
waterings daily, and a disease process.  Has anyone had experience with 
bark splits, especially in chitalpas?
      Thank you so much for your help.  Ginny