A December 2014 article in the Chicago Tribune about it:
http://www.chicagotribune.com/...
Another article in January this year:
http://www.chicagotribune.com/...
Gabriel, in one of these articles I read that the damage is exacerbated by hot dry weather. It's the right time when the trees were dying back.
Sue, the one with the white band wasn't chopped even though it had a green blob. They only remove the trees when the damage is 51% or more so it had a chance to survive.
