For more information click the links below.
PA Noxious Weeds List: https://www.agriculture.pa.gov/Plants_Land_Water/PlantIndustry/NIPPP/Pages/Controlled-Plant-Noxious-Weed.aspx
Penn Watch: https://pennwatch.org/pennsylvania-phasing-in-ban-of-invasive-callery-pear-also-called-bradford-pear/