Conium maculatum - Apiaceae Family - Biennial
Prevention (Prev) Monitor and destroy new plants before seed production.
Mechanical (Mech) Hand pulling, digging, cutting, mowing and tilling.
Cultural (Cult) Biological control agents, livestock grazing, and revegetation practices.
Chemical (Chem) Selective herbicides based on the plant and the specific location. Check our weed fact sheets for specific control information.
Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
Jan Samanek, State Phytosanitary Administration, Bugwood.org
Richard Old, XID Services, Inc., Bugwood.org
Drewitz, J. IPCW plant report: Conium maculatum.
Retrieved from https://www.cal-ipc.org/resources/library/publications/ipcw/report32/
& Rathfon, R. (2012, July). Poison
hemlock [PDF file]. Retrieved from https://www.extension.purdue.edu/extmedia/fnr/fnr-437-w.pdf
(2010). Exotic species: poison hemlock.
Retrieved from https://www.nps.gov/articles/poison-hemlock.htm
States Department of Agriculture. (2015, February). Field guide for managing poison hemlock in the Southwest [PDF
file]. Retrieved from https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5410121.pdf
States Department of Agriculture: Agricultural Research Service. (2018, June
26). Poison hemlock (conium maculatum). Retrieved
of California Statewide Integrated Pest Management Program. (2013, January). Poison hemlock. Retrieved from http://ipm.ucanr.edu/PMG/PESTNOTES/pn74162.html