Two more Michigan counties have been added to the list of places under quarantine for a bug that can kill hemlock trees, state officials said Friday. The Michigan Department of Agriculture and ...

ANN ARBOR, MI — An invasive pest that’s killing hemlock trees along Lake Michigan has been discovered at a University of Michigan arboretum in Ann Arbor. The Michigan Department of Agriculture ...

Rhode Island is mobilizing a small army of "tiny but mighty" bugs to help save its majestic hemlock trees. Brought into the Ocean State from Virginia, the predator beetles named Laricobius ...

After seven counties report detections in west and northwest Michigan, an invasive insect is found in Washtenaw County.

Hemlock Woolly Adelgid The hemlock woolly adelgid is a tiny sap-sucking bug that can kill needles, shoots, and branches of hemlock trees, resulting in the tree’s death.

Pennsylvania's state tree is the eastern hemlock. Its scientific name is "Tsuga canadensis."The eastern hemlock was named the state tree in 1931.These trees are slow-growing and long-lived, taking ...

Antrim County becomes latest to be found with hemlock woolly agelid. Infested trees turn gray-green and, without treatment, can die in four to 10 years.

The hemlock woolly adelgid has invaded two more Michigan counties, threatening trees in 11 counties total.

Hemlock woolly adelgid are small bugs that attach themselves to the branches of hemlock trees and siphon sap. Overtime, the process can kill trees by thinning canopies and reducing growth.

Cold winters are key to curbing an invasive pest that’s depleted Eastern hemlock trees for decades in Connecticut. Warm winters, fueled in part by climate change, allow these insects to spread ...

The insects are not native to Michigan and can cause significant harm to Michigan’s hemlock trees. There are an estimated 170 million hemlock trees in the state.