Unlike native species, Hogweed can grow up to 5 metres tall and has an herbaceous stem 5 to 10 centimetres in diameter. 0000005315 00000 n Giant hogweed can grow up to 15 feet tall and produce large clusters of white flowers. The clear, watery sap of giant hogweed contains toxins that cause phytophotodermatitis. 0000003275 00000 n Gian hogweed can grow near roads and trails. Giant hogweed is a short lived herbaceous biennial that dies after flowering (monocarpic). USDA. Giant hogweed has a phototoxic sap that, when exposed to light, can cause severe burns on the skin. Grand River Conservation Authority – July 2010 GIANT HOGWEED (Heracleum mantegazzianum) FACT SHEET Habitat: Giant Hogweed is a herbaceous non-native plant originating in Asia. 0000014726 00000 n Plant Industry. <<9B8A271E3ED23E4EBDE8723E035022EE>]>> Its presence along river 0000240033 00000 n 0000013344 00000 n Virginia Tech researchers who helped identify the dangerous Giant Hogweed plants in Clarke County, Virginia, want residents to stay on the lookout for the plant with toxic sap that can cause severe burns — but also stressed that the weeds are believed to have been planted intentionally decades ago and haven’t spread in the years since. Massachusetts Introduced Pests Outreach Project. Giant Hogweed Information Sheet (PDF) With recent efforts to combat invasive plants in woodlands, Penn State Extension has released new resources to help with identification and control. Do not purchase and grow Giant hogweed plants or seeds. Giant hogweed resembles some of our native species such as Angelica, Queen Anne’s Lace, and Cow parsnip. Giant hogweed (Heracleum mantegazzianum) is a member of the carrot or parsley family, Apiaceae (Umbelliferae). 0000006264 00000 n 0000162259 00000 n Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. It is generally the species that is thought of when referring to invasive hogweeds. 0000004083 00000 n Skin coated with this sap can become sensitive to sunlight and develop painful, burning blisters. Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit. Giant hogweed (Heracleum mantegazzianum) is a VERY LARGE, invasive plant that can cause painful burns and permanent scarring. Noxious weed seed and plant quarantine U.S. Weed Information; Heracleum mantegazzianum . Giant Hogweed. University of Georgia. It develops a thick hollow stem that can grow up to 15-20’ (4.3-5.8m) tall with purple splotches and stiff bristles. PPQ. 0000008571 00000 n Site-specific control methods need to match local situations. It is a member of the Apiaceae (Umbelliferae) family of plants, commonly known as the Carrot or Parsley family. 0000007125 00000 n Invasive Species Fact Sheet - Giant Hogweed (Heracleum mantegazzianum) Where does Giant Hogweed come from? Giant hogweed sap contains toxins that causes severe dermatitis when it contacts skin in the presence of sunlight (i.e. 0000196319 00000 n phytophotodermatitis). This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. Except for its size, the plant can be mistaken for a number of native, noninvasive plants such as cow parsnip (Heracleum lanatum), Angelica (Angelica atropurpurea), and poison hemlock (Conium maculatum). Giant hogweed is an herbaceous dicotyledonous plant that is classified as having a biennial life cycle. Heracleum mantegazzianumis the most common invasive large hogweed (growing up to 5.5 m) found in both Europe and North America. 0000005127 00000 n 0000006488 00000 n [Accessed Mar 19, 2015]. 401 0 obj <>stream The .gov means it’s official. It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. Giant Hogweed — Heracleum mantegassianum An invasive perennial and a public health hazard: Contact with sap followed by sun exposure can cause painful blistering. W:Sonya/Letters/Giant hogweed fact sheet CONTROL Giant hogweed is very difficult to eradicate. Fact Sheet: Giant Hogweed (Heracleum mantegazzianum) (2014) (PDF | 334 KB) New Hampshire Department of Agriculture, Markets, and Food. Virginia Tech researchers who helped identify the dangerous Giant Hogweed plants in Clarke County, Virginia, want residents to stay on the lookout for the plant with toxic sap that can cause severe burns — but also stressed that the weeds are believed to have been planted intentionally decades ago and haven’t spread in the years since. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. It was likely introduced to North America as an ornamental garden plant. Australian Government. Pesticide product registration is renewed annually. 0000007918 00000 n (RU�}b�|{Q!�d�-����%�|,>ȝ.Ѩx99��*�TK$P�k�U��I����{uy��L��u�BJ�&.`�KXZZZGG���8����P�. 0000112979 00000 n Heracleum mantegazzianum Sommier & Levier (ITIS), Produces toxic sap that can cause skin irritation and blindness (Gucker 2009). Department of the Environment and Energy. 0000112515 00000 n Giant hogweed is a member of the parsley or carrot family and was first introduced to North America as a garden ornamental. PA Noxious Weed Alert: Giant Hogweed (PDF | 1.31 MB), Noxious, Invasive and Poisonous Plant Program Publications, Giant Hogweed: Identification and Control (Sep 2020), Weed Control in Natural Areas in the Western United States: Giant Hogweed (2013) (PDF | 218 KB), New York Sea Grant Fact Sheet - Giant Hogweed (. The main difference is the height and the fact that it can cause serious burns to the skin. Michigan Department of Agriculture and Rural Development. Alberta Invasive Species Council (Canada). Single giant hogweed plant can produce 20,000 to 100,000 seeds. It is not known to be present in Minnesota and is a prohibited noxious weed on the eradicate list . Invasive Species Council of British Columbia (Canada). 0000241861 00000 n CONCERN plants by monopolizing Giant hogweed can have negative impacts on both the environ-ment and human health. Hollow stalks and stem produce sturdy bristles. 0000121240 00000 n Gucker, C.L. This is very similar-looking to giant hogweed but is much smaller. The stem and leaf stalks are … Federal government websites always use a .gov or .mil domain. Here is a fact sheet provided by the Nova Scotia Department of Natural Resources on giant hogweed and its associated risks. If a person gets the sap on their skin and their skin is exposed to sunlight it can cause chemical burns. 0000184503 00000 n Seeds are dispersed by wind or by water. Heracleum mantegazzianum. It is 2-4” (4.8-9.6 cm) in diameter. giant hogweed. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. 0000012268 00000 n Giant Hogweed (Heracleum mantegazzianum) is a plant native to Asia. 0000010805 00000 n Giant hogweed is a massive plant; it usually only lives for 2 years but it can grow to a height of 15’ and has enormous leaves and flower clusters. Anyone who suspects they have found Giant Hogweed should take photos, check online to compare the plant to giant hogweed photos, and then contact a Virginia Cooperative Extension agent. 0000002444 00000 n 0000240283 00000 n It can grow to a height of 15 to 20 feet. See also: New Hampshire's Prohibited Invasive Plant Fact Sheets for additional invasive trees, shrubs, vines, and herbaceous plants . The large flat cluster, umbel, of small white flowers is reminiscent of Queen Anne’s Lace, but giant hogweed’s umbel is much larger, growing up to 2½â€™ in diameter. 0000241029 00000 n Google. 0000003768 00000 n Invasive Species, 2270 Old Penitentiary Road, Boise, ID, 83712, United States 0000000016 00000 n Title: Microsoft Word - Giant hogweed.doc Author: hbutalla Created Date: 2/14/2006 9:59:59 AM 0000008341 00000 n x�b```f``�f`c`PX� Ā B��,.��=*�����|IǺ�"���9}�S�5�'`�� Pennsylvania Department of Conservation and Natural Resources. Its stems aren’t blotchy like those of giant hogweed (their colour graduates smoothly from green to purple) and are ridged, hollow and hairy. Provides state, county, point and GIS data. In: Fire Effects Information System. Weed Science. Date Posted 08/31/2020. It is an invasive, alien plant that originates from the Caucasus Mountains in west central Asia where it grows in subalpine meadows and forest edges. 0000161908 00000 n 0000240771 00000 n ����W`{z��s�,2R:����LLv,����ý�-��O 0000002099 00000 n ARS. Giant Hogweed has large, flat-topped to slightly dome-shaped flower and seed head and a bumpy or bristly stem. 0000004633 00000 n 0000166692 00000 n 0000007013 00000 n 0000241388 00000 n Center for Plant Health Science and Technology; California Department of Food and Agriculture. The leaves and flowers are very similar to that of cow parsley and the identification of Giant Hogweed is often confused for it. Division of Plant Industry. New Hampshire Department of Agriculture, Markets, and Food. Giant hogweed requires disturbance to estab-lish so it is important to maintain/restore desirable vegetation in habitats suitable for invasion. %PDF-1.6 %���� It can live for several years but once it flowers and bears fruit it dies. The .gov means it’s official.Federal government websites always use a .gov or .mil domain. 0000009553 00000 n European Network on Invasive Alien Species. Ontario's Invading Species Awareness Program (Canada). 0000183080 00000 n Giant Hogweed (heracleum mantegazzianum) is an invasive species that was introduced to Britain in the 19th Century as an ornamental plant. 0000001506 00000 n It is a long term project, possibly taking 5 to 10 years, if dealing with an established growth. Ontario Ministry of Natural Resources (Canada). Invasive Species Alert Sheet Giant Hogweed. Giant hogweed's stem can range from 10-15 cm in diameter with course hairs. 0000010974 00000 n 0000013992 00000 n 0000161570 00000 n 0000010200 00000 n Giant Hogweed (Heracleum mantegazzianum) is a perennial plant and a member of the carrot family. 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