The European Viburnum Leaf Beetle is now in Michigan and chewing up Viburnums. What makes this pest such a nuisance is that it eats Viburnums in both their larval and adults stages. Viburnums are the only things they eat.
One way to control them is to cut the plant to the ground after the first killing freeze (which we have had here in Michigan). This is effective because the adults lay their eggs in holes they chew in stems and branches and seal with a bark and poop mixture.
See http://msue.anr.msu.edu/news/viburnum_leaf_beetle_now_in_michigan and http://www.hort.cornell.edu/vlb/manage.html
