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Insect that kills hemlocks detected in NW Michigan county
February 21, 2021 GMT
HONOR, Mich. (AP) A small insect that can kill hemlock trees by feeding on their sap has been detected at the Sleeping Bear Dunes National Lakeshore in northwestern Michigan.
Earlier this month, surveyors found round, white ovisacs characteristic of the hemlock woolly adelgid on one tree in the Platte River Campground in Honor, Michigan’s Department of Agriculture and Rural Development said.
The popular campground is in northern Benzie County, southwest of Traverse City.
The insects’ feeding weakens needles, shoots and branches of the trees. Over time, tree growth slows and trees take on a grayish-green appearance.
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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.
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9 & 10 News
February 19, 2021
It is an insect that can devastate forests of trees.
Invasive species specialist, Robert Miller says, “Hemlock woolly adelgid is a small aphid like insect that uses its long siphoning mouth parts to extract sap from Hemlock trees, ultimately damaging and killing the trees.”
Over the last few years, Miller says new discoveries have led to more investigations.
“Unfortunately Hemlock woolly adelgid has become established in Allegan, Ottawa, Muskegon, Oceana, and Mason County and we’re working to respond to those infestations,” said Miller.
Most recently, they found a case at Sleeping Bear Dunes National Lakeshore.
“It was found at the Platte River Campground. So far, just in one tree. Our [vegetation] crew has been doing surveys as recommended by Michigan DNR in a radius around the original location,” said Vince Cavalieri, wildlife biologist for the park.
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