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Invasive Species

October 16, 2019 12:00 AM
By: DCNR

Pennsylvania's state tree, the eastern hemlock, is seriously threatened by the invasive hemlock woolly adelgid.


March 01, 2019 12:00 AM
By: DCNR

New invasive species are expected to move into the commonwealth, and those already here could increase due to changing climate.


February 27, 2019 12:00 AM
By: Rebecca Bowen, Ecological Services Section Chief, DCNR's Bureau of Forestry

We're always on the lookout for invasive plant species that are up-and-coming threats. Check out these emerging species of concern.