Antrim is now the eighth Michigan county with active hemlock woolly adelgid. The extent of this latest outbreak is still under investigation.
These small insects feed on the sap of hemlocks and can lead to fatal infections that can kill trees within four to ten years.
Rob Miller is an invasive species prevention and response specialist with the state.
He says land owners should be checking hemlock trees for infections by flipping branches over to exam their underside.
"And if a tree is infested with hemlock woolly adelgid it'll have these little tiny white, they look like little cotton balls almost right where the individual needle of the hemlock meets the branch," Miller said.
Miller says any suspected cases should be reported to the state.
