Kudzu vine was introduced in the United States in the late 19th century and promoted as an erosion control plant, but it spread rapidly throughout the southeastern states. Pennsylvania established a kudzu eradication program from 2005-2008 that treated over half the known populations in the state. Currently, kudzu is found in small scattered populations across 19 counties, managed through various control methods. Palmer amaranth, a highly invasive pigweed, was first discovered in Pennsylvania in 2013 and poses a serious threat to agriculture due to its prolific seed production and herbicide resistance. State agencies work to contain and eradicate new populations through public education and coordinated response.