elm tree - why are the leaves yellowing? (bandwidth warning)

[kj]

Where the heck did you pull that one from, BL! It says in the article that other environmental conditions can cause leaf scorch (excess salt, drought, root damage), so maybe it isn't bacterial. For some reason, I'd rather it not be bacterial ;-). We used to have a lot of elms here, but almost all are gone from dutch elm disease. Other types of trees are apparently favored now, at least here. kj.