0000014726 00000 n 0000005416 00000 n 0000010947 00000 n Giant Hogweed — Heracleum mantegassianum An invasive perennial and a public health hazard: Contact with sap followed by sun exposure can cause painful blistering. Water and Land Resources Division. The .gov means it’s official.Federal government websites always use a .gov or .mil domain. Habitat Morphology 0000013344 00000 n 0000002444 00000 n Revised January 2019 Habitat and biology • Perennial plant from carrot or parsley (Apiaceae) family • Mature plants flower in May, producing up to 100,000 seeds that are viable in soil to 15 years • Reproduces by seeds, possibly vegetative (RU�}b�|{Q!�d�-����%�|,>ȝ.Ѩx99��*�TK$P�k�U��I����{uy��L��u�BJ�&.`�KXZZZGG���8����P�. Giant hogweed (Heracleum mantegazzianum) is a member of the carrot or parsley family, Apiaceae (Umbelliferae). GIANT HOGWEED The preferred method of control is integrated pest management (IPM). Washington State Noxious Weed Control Board. Department of the Environment and Energy. 0000007239 00000 n PPQ. 0000161570 00000 n Center for Plant Health Science and Technology; California Department of Food and Agriculture. Alaska Center for Conservation Science. It is 2-4” (4.8-9.6 cm) in diameter. Invasive Species Council of British Columbia (Canada). Invasive Species Alert Sheet Giant Hogweed. National Genetic Resources Program. This plant only reaches a maximum height of 2 metres (6ft 7) and the symmetrical flower heads only reach 20cm across. Denial of seed production, with appropriate site rehabilitation, for 4 to 5 years usually eradicates limited local populations. The clear, watery sap of giant hogweed contains toxins that cause phytophotodermatitis. 343 59 Giant hogweed can grow up to 15 feet tall and produce large clusters of white flowers. 0000009146 00000 n 0000241388 00000 n Giant hogweed sap contains toxins that causes severe dermatitis when it contacts skin in the presence of sunlight (i.e. Heracleum mantegazzianum. 0000008571 00000 n Maps can be downloaded and shared. Invasive Species Fact Sheet - Giant Hogweed (Heracleum mantegazzianum) Where does Giant Hogweed come from? Click on images to view full-size Title: Microsoft Word - Giant hogweed.doc Author: hbutalla Created Date: 2/14/2006 9:59:59 AM USA. It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. Google. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. Reproduction and spread: Giant hogweed plants reproduce via seed. Giant hogweed is an herbaceous dicotyledonous plant that is classified as having a biennial life cycle. 0000012957 00000 n It develops a thick hollow stem that can grow up to 15-20’ (4.3-5.8m) tall with purple splotches and stiff bristles. 0000005127 00000 n It is known to grow in freshwater wetlands, grasslands, dis-turbed areas, urban areas, and gardens. Gucker, C.L. Common Name: Giant Hogweed Scientific Name: Heracleum mantegazzianum Sommier & Levier Family: Apiaceae Description: A biennial or perennial herb in the carrot family growing to 15’ tall, with a taproot or fibrous roots. Toxic sap is found in the leaves, stems, flowers, and roots of giant hogweed. 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. 0000112979 00000 n 0000240771 00000 n Federal government websites always use a .gov or .mil domain. 0000006488 00000 n Giant hogweed is actually the common name of four species of large hogweeds that are invasive outside of their native range. Virginia Tech; Virginia State University. 2009. 0000007013 00000 n Australian Government. 0000002281 00000 n University of Georgia. This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. This is very similar-looking to giant hogweed but is much smaller. 0000184503 00000 n In: Fire Effects Information System. It was likely introduced to North America as an ornamental garden plant. Giant Hogweed Information Sheet (PDF) Giant Hogweed. Giant Hogweed (Heracleum mantegazzianum) is a perennial plant and a member of the carrot family. Hollow stalks and stem produce sturdy bristles. Grand River Conservation Authority – July 2010 GIANT HOGWEED (Heracleum mantegazzianum) FACT SHEET Habitat: Giant Hogweed is a herbaceous non-native plant originating in Asia. Seeds generally fall at the base of the parent plant but survive transport by water and this is the main means of seed dispersal. 0000004083 00000 n 0000010805 00000 n Product names and formula-tions may vary from year to year. Giant Hogweed (heracleum mantegazzianum) is an invasive species that was introduced to Britain in the 19th Century as an ornamental plant. Pesticide product registration is renewed annually. Nuisance & Invasive Species - Giant Hogweed: Do Not Touch This Plant! Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. 0000121240 00000 n The main difference is the height and the fact that it can cause serious burns to the skin. Giant hogweed, or Heracleum mantegazzianum is considered a noxious weed by the federal government. 0000241861 00000 n The stem and leaf stalks are … 0000009806 00000 n Date Posted 08/31/2020. Unlike native species, Hogweed can grow up to 5 metres tall and has an herbaceous stem 5 to 10 centimetres in diameter. 0000002099 00000 n Giant hogweed is a member of the parsley or carrot family and was first introduced to North America as a garden ornamental. Ontario's Invading Species Awareness Program (Canada). Provides state, county, point and GIS data. ����W`{z��s�,2R:����LLv,����ý�-��O 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. Purdue University Extension. giant hogweed. Heracleum mantegazzianumis the most common invasive large hogweed (growing up to 5.5 m) found in both Europe and North America. GRIN-Global. 0000009553 00000 n 0000005660 00000 n 0000166692 00000 n Giant hogweed resembles some of our native species such as Angelica, Queen Anne’s Lace, and Cow parsnip. Division of Plant Industry. Ontario Ministry of Natural Resources (Canada). 0000161838 00000 n 0000006264 00000 n Giant Hogweed (Heracleum mantegazzianum) is a plant native to Asia. A total of 14 new invasive plant fact sheets are now available. 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. Integrated Taxonomic Information System. 0000007125 00000 n 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 (. It is generally the species that is thought of when referring to invasive hogweeds. 0000003768 00000 n Connecticut Invasive Plant Working Group. EDRR Fact Sheet Randy G. Westbrooks, U.S. Geological Survey. 0000183080 00000 n x�b```f``�f`c`PX� Ā B��,.��=*�����|IǺ�"���9}�S�5�'`�� Impacts: Giant hogweed outcompetes native plant species for habitat. 0000003275 00000 n <<9B8A271E3ED23E4EBDE8723E035022EE>]>> Giant hogweed is a short lived herbaceous biennial that dies after flowering (monocarpic). startxref 0000005365 00000 n Giant Hogweed has large, flat-topped to slightly dome-shaped flower and seed head and a bumpy or bristly stem. It is a long term project, possibly taking 5 to 10 years, if dealing with an established growth. Plant Industry. 0000010974 00000 n trailer Giant hogweed seeds can survive in the soil seed bank for more than 5 years. Here is a fact sheet provided by the Nova Scotia Department of Natural Resources on giant hogweed and its associated risks. Plant Pest Risk Assessment for Giant Hogweed, Invasive Plants in Pennsylvania: Giant Hogweed (PDF | 180 KB), King County (Washington) Noxious Weed Control Program - Giant Hogweed. The leaves and flowers are very similar to that of cow parsley and the identification of Giant Hogweed is often confused for it. 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. 0000196319 00000 n Pennsylvania Department of Agriculture. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. 0000015364 00000 n Weed Research and Information Center. Heracleum mantegazzianum Sommier & Levier (ITIS), Produces toxic sap that can cause skin irritation and blindness (Gucker 2009). It can live for several years but once it flowers and bears fruit it dies. ARS. Pennsylvania Department of Conservation and Natural Resources. Giant hogweed (Heracleum mantegazzianum), also known as Giant cow parsnip is a perennial plant and a member of the carrot family. 0000162259 00000 n 0000012268 00000 n Giant hogweed's stem can range from 10-15 cm in diameter with course hairs. phytophotodermatitis). 0000012678 00000 n Michigan Department of Agriculture and Rural Development. Announcing New Invasive Plant Fact Sheets Series. 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). CONCERN plants by monopolizing Giant hogweed can have negative impacts on both the environ-ment and human health. See also: New Hampshire's Prohibited Invasive Plant Fact Sheets for additional invasive trees, shrubs, vines, and herbaceous plants . Giant hogweed has a phototoxic sap that, when exposed to light, can cause severe burns on the skin. 0000112515 00000 n Great Britain Non-Native Species Secretariat. Fact Sheets & Plant Guides: Introduced, Invasive, and Noxious Plants : Threatened & Endangered: Wetland Indicator Status ... giant hogweed, giant cow parsnip. Weed Science. Wisconsin Department of Natural Resources. If a person gets the sap on their skin and their skin is exposed to sunlight it can cause chemical burns. Noxious weed seed and plant quarantine U.S. Weed Information; Heracleum mantegazzianum . University of California. 0000175558 00000 n It is not known to be present in Minnesota and is a prohibited noxious weed on the eradicate list . Site-specific control methods need to match local situations. It invades old fields and native habitats such as open woodlands. Whiteville, North Carolina. Massachusetts Introduced Pests Outreach Project. USDA. With recent efforts to combat invasive plants in woodlands, Penn State Extension has released new resources to help with identification and control. Giant hogweed (Heracleum mantegazzianum) is a VERY LARGE, invasive plant that can cause painful burns and permanent scarring. The .gov means it’s official. 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. 401 0 obj <>stream 0000005315 00000 n Or, to display all related content view all resources for Giant Hogweed. The leaves are extremely large growing to … [Accessed Mar 19, 2015]. It is a member of the Apiaceae (Umbelliferae) family of plants, commonly known as the Carrot or Parsley family. 0000013992 00000 n The section below contains highly relevant resources for this species, organized by source. If an established growth is found, it is recommended that a contractor be hired to remove the growth. GIANT HOGWEED Heracleum mantegazzianum Sommier & Levier Native Origin: Europe- introduced as an ornamental or spice Description: Giant hogweed is a biennial or perennial herb in the carrot family (Apiaceae), growing 15 to 20 feet in height with stout dark reddish-purple stems and spotted leaf stalks. APHIS. Center for Invasive Species and Ecosystem Health. 0000240033 00000 n European and Mediterranean Plant Protection Organization. Giant hogweed has the potential to spread readily and grows along roadsides, ditches and streams. %%EOF Virginia Cooperative Extension. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. Brushing against or breaking the plant releases sap that, combined with sunlight and moisture, can cause a severe burn within 24 to 48 hours. 0000010200 00000 n 0000161908 00000 n USDA. 0000002617 00000 n Giant hogweed requires disturbance to estab-lish so it is important to maintain/restore desirable vegetation in habitats suitable for invasion. Its presence along river Gian hogweed can grow near roads and trails. 0000008341 00000 n 343 0 obj <> endobj With no known diseases or insect pests here in Canada, the plant 0 xref Giant Hogweed Heracleum mantegazzianum HABITAT Giant hogweed likes moist soil and pre-fers full sun. Skin coated with this sap can become sensitive to sunlight and develop painful, burning blisters. W:Sonya/Letters/Giant hogweed fact sheet CONTROL Giant hogweed is very difficult to eradicate. 0000001506 00000 n It's part of the carrot family, but it can grow up to 14 feet tall. Invasive Species, 2270 Old Penitentiary Road, Boise, ID, 83712, United States Its stems aren’t blotchy like those of giant hogweed (their colour graduates smoothly from green to purple) and are ridged, hollow and hairy. University of Connecticut. %PDF-1.6 %���� 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. 0000007918 00000 n Home and Garden Information Center. European Network on Invasive Alien Species. 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. It prefers moist, disturbed soil and Except ... rent as of the date of the fact sheet. National Invasive Species Information Center, Virginia Tech Scientists who Identified Dangerous Giant Hogweed in Clarke County Hopeful That it will be Contained (Jun 18, 2018), Early Detection & Distribution Mapping System (EDDMapS) - Giant Hogweed, Pest Tracker - Survey Status of Giant Hogweed, YouTube - Giant Hogweed: A Herculean Weed with Power, Factsheet - Giant Hogweed (Mar 2017) (PDF | 758 KB), Fact Sheet: Giant Hogweed (Jan 2014) (PDF | 804 KB), Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Giant Hogweed (Feb 7, 2011) (PDF | 235 KB), NOBANIS: Invasive Alien Species Fact Sheet -. Giant hogweed occurs in the following Canadian provinces: New Hampshire Department of Agriculture, Markets, and Food. 0000241029 00000 n 0000176030 00000 n New York Department of Environmental Conservation. 0000004633 00000 n 0000240283 00000 n 0000002573 00000 n It blooms in midsummer. 0000183810 00000 n Federal Noxious Weed Disseminules of the U.S. - Fact Sheet: Invasive Plant Atlas of the United States - Giant Hogweed, New York Invasive Species Information - Giant Hogweed, Non-native Species Information: Giant Hogweed, Conservation Practice Job Sheet VT-315 - Giant Hogweed (PDF | 125 KB), New Hampshire's Prohibited Invasive Plant Fact Sheets. Alberta Invasive Species Council (Canada). Fact Sheet: Giant Hogweed (Heracleum mantegazzianum) (2014) (PDF | 334 KB) New Hampshire Department of Agriculture, Markets, and Food. Heracleum mantegazzianum. Giant Hogweed was introduced to the UK in the early 19th Century. It can grow to a height of 15 to 20 feet. Effects may include welts, rashes, and blistering, followed by pigmented scarring that may persist for as long as six years. King County Department of Natural Resources (Washington). Division of Plant Industry. 0000000016 00000 n It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. University of Alaska - Anchorage. 0000011460 00000 n Seeds are dispersed by wind or by water. Single giant hogweed plant can produce 20,000 to 100,000 seeds. Grows in moist soil, especially in ditches and ravines in both sun and shade. Do not purchase and grow Giant hogweed plants or seeds. YouTube; University of Maryland Extension. Description: Giant Hogweed is a member of the parsley or carrot family (umbelliferae). , commonly known as giant cow parsnip river giant hogweed but is much smaller North. 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