The first instar larva ("crawler") of the balsam woolly adelgid (Adelges piceae). Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

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.

Hemlock woolly adelgid target hemlock and fir trees ... that progresses to tree mortality in 4-10 years. In Wisconsin, balsam and Fraser fir are highly susceptible. Symptoms of an attack include ...