Photographs of my sick ash at
http://www3.sympatico.ca/gbmiller/sickash01.JPG
http://www3.sympatico.ca/gbmiller/sickash02.JPG
http://www3.sympatico.ca/gbmiller/sickash03.JPG

Last week I described the problem:

I have a fully grown, 25 year old ash tree. A few years ago some crunchy,
crab-apple type growths appeared on some of the branches. I must say I
didn't pay much attention, but last year a significant amount of the tree
was covered.

When removed, these growths crumble into small pieces. They are dark brown
in colour. The tree seems healthy otherwise.

I'm in Canada, Southern Ontario. I'd appreciate some advice on what is
happening., and what I can do about it.

Thanks,

George

Sed5555 gave me the following link which seems closest to what I'm seeing:
http://www.colostate.edu/Depts/CoopE...ests/galls.htm

I don't think it's the ash borer although I am in the affected area (1 hour
from Niagara Falls).

If it is a gall of some sort, Sed's link suggests just leving it alone, but
it dowsn't mention whether it resolves or persists. The leaves seem
unaffected.

Can anyone give me more information?

Thanks

George