Hemlock woolly adelgid has been moving north along Lake Michigan since 2015 and is now present in Allegan, Antrim, Ottawa, Muskegon, Oceana, Mason, Benzie, Leelanau and Washtenaw counties. It is an ...

Overtime, the process can kill trees by thinning canopies and reducing growth. Without treatment, hemlock trees can die within four years. "Situations like this highlight the crucial role public ...

There are insecticide treatments available, but if left untreated, “it can be fairly devastating,” as much of the north end of the park contains the Eastern Hemlock, Derico said.