City of Rockford issued the following announcement on Nov 29.
Notice of Pest Survey Activities - Balsam Woolly Adelgid
This past summer balsam woolly adelgid was found on a private property near Rockford MI. Balsam woolly adelgid is an invasive pest that kills fir trees. Beginning Dec 8, The Michigan Department of Agriculture and Rural Development will be conducting survey (inspection) near Rockford MI to determine the extent of the infestation.
Balsam Woolly Adelgid Information Sheet
Original source can be found here.