pest photo

Thomas B. Denholm, New Jersey Department of Agriculture, Bugwood.org
Giant hogweed
Heracleum mantegazzianum

Giant hogweed (Heracleum mantegazzianum) is an invasive plant. It is a native of Caucasus and was first detected in North America in the early 1900's.

Also known as Cow Parsley, this weed grows to 6 to 16 feet high and has a dark red stem up to 3 inches in diameter. It lives for 5 to 7 years and flowers in its final year, producing umbrella shaped clusters of small white flowers up to 31 inches in diameter. Contact to bare skin can cause photodermatitis, resulting in blisters and scars.

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08/19/2020 - Japanese Knotweed spotted on the bank of Eagley Brook
08/19/2020 - Native vs. invasive plant species: Can you spot the difference?
07/22/2020 - Beautiful but dangerous: giant hogweed found at Hadley Point
07/22/2020 - Do not touch this plant: Giant hogweed can cause severe burns ...
07/22/2020 - Giant hogweed 'mother plant' found in Derry
07/22/2020 - Giant hogweed can cause blisters and lead to blindness if touched
07/22/2020 - Giant hogweed control efforts ­ongoing in Racine
06/04/2020 - Children playing by river banks with dangerous giant hogweed
06/04/2020 - Difference between cow parsley, hogweed and giant hogweed
06/04/2020 - Fresh warnings over giant hogweed growing along Dundee's Dight...
06/04/2020 - Giant Hogweed and Wild Parsnip: Do Not Touch!
06/04/2020 - Giant hogweed plant burns: How do you treat giant hogweed burn?
06/04/2020 - Giant hogweed warning after dangerous weed spotted by Hereford...
06/04/2020 - Giant Hogweed: How to identify and get rid of the toxic plant
06/04/2020 - Giant Hogweed: map of where the dangerous plant grows in the U...
03/19/2020 - Shocking growth as giant hogweed returns early
03/04/2020 - Conveyancers Warned Flooding Helps Spread Japanese Knotweed
03/04/2020 - Japanese Knotweed, Himalayan Balsam Could Spread To UK Gardens...
11/11/2019 - Threat of Asian hornet and giant hogweed must be tackled with ...
10/01/2019 - Climate change abatement and ash dieback disease
10/01/2019 - Giant Hogweed, Himalayan Balsam and Japanese Knotweed: are clo...
09/13/2019 - Dog owner's warning for giant hogweed in Leeds after pup left ...
09/05/2019 - Youth wanted in helping combat invasive species in Vancouver
09/04/2019 - Police warning after dog is injured brushing against 'UK's mos...
08/19/2019 - Giant hogweed alert for Oban residents after four receive medi...
08/19/2019 - Giant hogweed, knotweed and butterfly bush among plants Powell...
08/19/2019 - Limerick project to control spread of Giant Hogweed
08/19/2019 - We met Edinburgh's Giant Hogweed-busters: The team working to ...
07/26/2019 - Eco Talk: What to know about giant hogweed in Cayuga County
07/26/2019 - Plants That Give You A Rash Besides Poison Ivy, Oak
07/26/2019 - Stirling branded 'hogweed capital of Scotland' by conservation...
07/23/2019 - The 15 Worst Invasive Plants in America
07/17/2019 - NY, Oregon Officials Issue Warnings After Giant Hogweed Found
07/17/2019 - Why you should not touch the giant hogweed plant
07/16/2019 - Calls for eradication plan to tackle the Giant Hogweed plant a...
07/09/2019 - 2018 Giant Hogweed Eradication Efforts Report Issued
07/09/2019 - Toxic giant hogweed plant spotted in Kidderminster
06/17/2019 - Gardener, 25, almost BLINDED and covered in burns by toxic gia...
06/14/2019 - Tunbridge Wells gardener 'nearly blinded' after giant hogweed ...
06/13/2019 - Groundskeepers at Cazenovia Park Golf Course take action again...
06/13/2019 - Invasive plants found at 308 spots on Muskoka district roads b...
06/06/2019 - Country diary: beautiful hogweed is not to be snorted at
06/03/2019 - The 18 places in Kent you're likely to get stung by dangerous ...
06/03/2019 - Warning after giant hogweed grows over Preston pavements
05/16/2019 - Help Coquitlam rid itself of invasive plant species
05/07/2019 - Giant Hogweed: what it looks like, how to treat burns and ever...
05/07/2019 - Group warns of hogweed spread | Rome Daily Sentinel
05/07/2019 - Warning Over Giant Hogweed Which Is Set To Thrive This Summer
11/16/2018 - A council is set to employ four people as part of a £300k pla...
10/14/2018 - On the trail of hogweed and other invasive plants
09/04/2018 - 15 invasive plants that could be wreaking havoc on your yard o...
07/30/2018 - Battle of the hogweed in Coquitlam
07/30/2018 - Don't touch: Invasive hogweed plant found in Central Mass.
07/30/2018 - Giant Hogweed Is the Skin-Burning, DNA-Attacking Plant of Your...
07/30/2018 - Giant Hogweed warning: Weed leaves horrifying burns and blisters
07/30/2018 - Giant hogweed's rep spreads locally, plant hasn't
07/30/2018 - Giant hogweed: How concerned should we be in upstate New York?
07/30/2018 - Health Alert: Dangerous plants
07/30/2018 - Poison ivy: Stay away from vine that can cause skin irritation
07/23/2018 - Big patch of plants that cause 3rd-degree burns found in NC ne...
07/23/2018 - Burn-causing invasive plant spotted in the Lehigh Valley
07/23/2018 - Found In Alexandria: A Poisonous Plant That Causes Burns And B...
07/23/2018 - Giant hogweed could pose danger to West Virginians
07/23/2018 - Giant hogweed deliberately planted in Clarke County
07/23/2018 - Giant hogweed, a toxic plant you need to know about in Va.
07/23/2018 - Giant hogweed, wild parsnip and other dangerous plants to avoid
07/23/2018 - Hogweed plant that causes burns, blindness found in northern V...
07/23/2018 - Hundreds of dangerous hogweed plants found in Watauga County
07/23/2018 - Invasive, Blinding Weed Spreads to Virginia
07/23/2018 - Massachusetts Steps Up to Eradicate Poisonous Plant
07/23/2018 - New concerns toxic weed that causes burns, blindness could spr...
07/23/2018 - Noxious weed alert: Giant hogweed spotted in Virginia
07/23/2018 - Plant That Causes 3rd Degree Burns, Blindness Grows In Wisconsin
07/23/2018 - Stalking giant hogweed - and other noxious weeds - in West Sea...
07/23/2018 - State working to eradicate giant hogweed plant found locally n...
07/23/2018 - This highly toxic plant causes burns and blindness - and it's ...
07/23/2018 - Toxic Plant That Can Cause Blindness Found In Pennsylvania
07/19/2018 - How to identify dangerous hogweed plant that can burn skin
07/18/2018 - Dangerous giant hogweed removed from West Seattle yard
07/18/2018 - 'Perfect summer' for hazardous giant hogweed in region
07/18/2018 - Beware the Giant Hogweed Plant
07/18/2018 - Canadian Hikers Beware: Giant Hogweed Looks Harmless, But Can ...
07/18/2018 - Dangers of hogweed
07/18/2018 - Giant hogweed is spreading across Western New York
07/18/2018 - Giant hogweed is spreading in heatwave - what you need to know...
07/18/2018 - Giant hogweed plant: don't touch
07/18/2018 - Horror Plant 'Giant Hogweed' Can Be Removed For Free In CNY
07/18/2018 - New reference guide of poisonous plants released
07/18/2018 - What to do if you see dangerous hogweed
07/18/2018 - Worse than poison ivy: How to identify, report dangerous...
07/16/2018 - Dangerous Giant hogweed confirmed in Virginia but no evidence ...
07/16/2018 - How to safely remove invasive giant hogweed plant
05/07/2018 - Britain's most dangerous plant is spotted growing in Bristol
08/11/2017 - Toxic hogweed plant spreading in Canada
08/10/2017 - Japanese knotweed threatens to invade parking lot in Bracebridge
08/07/2017 - Dangerous Hogweed Spreading Across Island
08/03/2017 - Oneida Co. health officials warn public to be on lookout for G...
08/01/2017 - To Every Weed There Is a Season
07/26/2017 - Dangerous plant warning across Dumbarton canal stretches
07/14/2016 - Giant Hogweed vs Cow Parsnip: What is the difference?
06/10/2016 - Nova Scotia woman warns of run-in with giant hogweed
09/15/2015 - Seen At 11: Invasive Giant Hogweed Plant Can Cause Burns On Sk...
08/04/2015 - Plant that can blind you found in Michigan
07/27/2015 - How hogweed is taking over the British countryside
07/22/2015 - Hogweed isn’t going anywhere
07/16/2015 - DEC Joins Hogweed Fight At Delaware County Patch
07/16/2015 - Massachusettes plant can cause serious burns
06/29/2015 - Giant hogweed and 5 other dangerous foreign plants you should ...
06/15/2015 - Municipality commits to first steps in battle against Giant Ho...
10/20/2014 - October Weed of the Month: Giant hogweed - International Falls...
09/29/2014 - Be on the Lookout for Giant Hogweed
08/19/2014 - Be on the Lookout for Giant Hogweed
08/11/2014 - Giant Hogweed Spreading Throughout New York State
06/17/2014 - Blackface Sheep Winning Giant Hogweed Battle
06/12/2014 - Giant Confusion - Giant Hogweed and Common Look-Alikes
05/07/2014 - Dundee City Council Targets Giant Hogweed Numbers
04/15/2014 - Be on the Lookout for Japanese Knotweed, Water Chestnut, More ...
02/27/2014 - Invasive Species Legislation Introduced
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Danger - Don't Touch
On Giant Hogweed and Other Invasive Plants - Audio
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