pest photo

Steve Dewey, Utah State University, Bugwood.org
Poison hemlock
Conium maculatum

Poison hemlock (Conium maculatum) is an invasive plant. It is a native of Europe, Asia and Africa and was first detected in West Virginia in 1939.

Poison hemlock is a tall biennial. It has leaves and white flowerheads resembling those of parsnips, carrots, and water hemlock. All parts of poison hemlock are poisonous. Poison hemlock commonly occurs in sizable stands of dense, rank growth along roadsides, field margins, ditchbanks and in low-lying waste areas. Once it is firmly established under such conditions, hemlock can preclude most other vegetation and established pastures.

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News

08/04/2020 - Invasive poison hemlock takes root in Macomb County
08/04/2020 - LIVESTOCK PRODUCERS URGED TO KEEP AN EYE OUT FOR POISON HEMLOCK
08/04/2020 - Poison hemlock and wild parsnip, A couple of bad actors
08/04/2020 - Time is now to eradicate hemlock
08/04/2020 - Watch for poison hemlock
08/04/2020 - Watch Out for Poisonous Weeds in Hay and Pasture
05/01/2020 - Poison Hemlock
03/04/2020 - Livestock producers should watch for poison hemlock
01/21/2020 - Poison hemlock confirmed in two Minnesota counties
01/15/2020 - Two noxious weeds spread to Rice County
01/03/2020 - Warning over poisonous hemlock as dog is put down
12/04/2019 - Nature News: Brew up some Eastern hemlock tea to warm up
09/17/2019 - AmeriCorps plays central role in controlling noxious weeds
09/05/2019 - Two Non-Native Weeds Threaten Root River Through SE MN
07/11/2019 - Invasive poison hemlock a growing concern on Vancouver Island
07/09/2019 - Poison hemlock and wild parsnip thriving in southern Ohio
07/09/2019 - Poison hemlock, a toxic, invasive plant, is popping up more an...
07/09/2019 - Poisonous plant found along the Greenbelt trail
07/09/2019 - Wild Parsnip, Poison Hemlock on the rise in Ohio: What to watc...
06/20/2019 - Got noxious weeds? In Seattle metro, there's an app for that
06/19/2019 - Weeds taking over landscape
06/17/2019 - Local experts talk about invasive species
06/07/2019 - Poison hemlock may look harmless, but it's actually deadly: Wh...
06/06/2019 - Poison hemlock in peak bloom, spreading throughout Pennsylvania
06/06/2019 - Tips to stay safe as poison hemlock blooms in Central PA
06/05/2019 - Help for gardeners: What to do with hemlock?
06/05/2019 - Poison hemlock in peak bloom, spreading throughout Pennsylvania
06/03/2019 - Poison Hemlock now present in Idaho
05/15/2019 - Deadly poison hemlock found growing near Killian sports fields
05/08/2019 - Noxious weeds continue to spread across Minnesota
05/08/2019 - Super bloom coincides with super invasive species boom
05/08/2019 - Volunteers pull 80 pounds of poison hemlock from Fuji Park, se...
11/30/2018 - 6 Plants In Idaho That Want To Kill You
09/20/2018 - Watch out for poison hemlock
08/23/2018 - Poison lurks beneath the petals of some Shuswap plants
07/30/2018 - Officials urge control, prevention of poison hemlock, spotted ...
07/23/2018 - Giant hogweed, wild parsnip and other dangerous plants to avoid
07/23/2018 - What you need to know about poison hemlock
05/03/2018 - Beware of poison hemlock
08/10/2017 - Japanese knotweed threatens to invade parking lot in Bracebridge
08/03/2017 - It was Socrates' undoing, and it's all over the coast
08/01/2017 - To Every Weed There Is a Season
03/01/2016 - Late winter scouting can help battle a poisonous weed - Farm a...
06/09/2015 - Poison hemlock exploding across Lancaster County - LancasterOn...
05/29/2015 - Spring is poison-hemlock danger time in Western Washington - C...
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