May 31, 2011
June 1, 2011
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Trees sucker more when they are under stress Without knowing more about your trees, I cannot give a specific reason why it might be stressed, but common reasons are under-watering, pest infestation and root constriction. If you reduce the stress on the tree, the suckers will lessen.
Our quaking aspens have developed a coated fungus looking stuff on the bark, then they get the branch completely full of this. It is a grey looking matter, then the leaves die and they fall off. It has spread to the other aspens around it. Is there any treatment for this, or do they need to be cut down?
Aspen catkins, which emerge before leaves appear, are cylindrical in shape and fuzzy, with feather-like tufts of hair adorning numerous tiny seeds.
Sounds like a normal spring tree event.
The first image is a Quaking Aspen Tree.
The 2nd image I can't see clearly enough to make any id for you.
This article has information on the Aspen Tree.