By Jonesc11
United Kingdom 
Leaves on silver birch tree full of holes on June.what can I do to treat
15 Jun, 2014
By Jonesc11
United Kingdom
Leaves on silver birch tree full of holes on June.what can I do to treat
15 Jun, 2014
Nothing, without knowing what's caused the holes, and whether the pest is still present. If you can find a pest on the tree (sawfly larvae or similar) then you can treat for that. Otherwise, posting a photo of the damage might help.
15 Jun, 2014