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Noxious, Invasive and Poisonous Plant Program

The Pennsylvania Department of Agriculture administers the Noxious Weed Control Law and Noxious Weed Control List and implements federal and state eradication and control programs when a noxious weed of limited distribution in the commonwealth is targeted by federal or state funding for suppression, control or eradication.

Poisonous plant identification and information is also provided by the Department and the Department houses and maintains the State Herbarium.  Poisonous Plants of Pennsylvania Publications are available

Articles and additional information to identify the 13 Pennsylvania Noxious Weeds on the Control List are available under the publications section of this program.  The weeds are listed by their common names and also the scientific names.

Bull Thistle or Spear Thistle - Cirsium Vulgare
Canada Thistle - Cirsium Arvense
Giant Hogweed - Heracleum Mantegazzianum (Active Field Program)
Goatsrue - Galega Officinalis (Active Field Program)
Jimsonweed - Datura Stramonium
Johnson Grass - Sorghum Halepense
Kudzu-Vine - Pueraria Lobata (Active Field Program)
Marijuana - Cannabis Sativa
Mile-a-Minute - Polygonum Perfoliatum
Multiflora Rose - Rosa Multiflora
Musk Thistle or Nodding Thistle - Carduus Nutans
Purple Loosestrife - Lythrum Salicaria
Shattercane - Sorghum Bicolor

Questions regarding the control programs should be directed to the contact listed below or the nearest PDA Regional Office.

For additional information on invasive species of concern in Pennsylvania, please visit the Pennsylvania Invasive Species Council (PISC).Palmer.pdfPalmer.pdf