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Invasive hemlock woolly adelgid found in northern Benzie County
The Michigan Department of Agriculture and Rural Development recently verified a new detection of invasive hemlock woolly adelgid at the Sleeping Bear Dunes National Lakeshore in northern Benzie County. To date, a survey of the surrounding area has found just one infested tree in the Platte River Campground, a popular destination within the National Lakeshore.
Hemlock woolly adelgids are small insects that use their long, siphoning mouthparts to extract sap from hemlock trees. Their feeding weakens needles, shoots and branches. Over time, tree growth slows, and trees take on a grayish-green appearance. Without treatment, infested trees die within four to 10 years.