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Jun 19, 2018 · Giant hogweed, the nasty invasive plant that’s currently in the news — experts discovered it for the first time in Virginia recently — has been found in scattered places in Ohio for a number of years, especially in Ashtabula County in the state’s far northeastern corner.
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Giant hogweed’s umbrella-shaped inflorescence can grow up to...
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- Identification
- Control of Giant Hogweed
- Acknowledgements
- References
- Photo Credits
Giant hogweed is an herbaceous dicotyledonous plant that is classified as having a biennial life cycle. It is a member of the Apiaceae (Umbelliferae)family of plants, commonly known as the Carrot or Parsley family. It can live for several years but once it flowers and bears fruit it dies. Giant hogweed is hardy to zone 3 and prefers full sun and mo...
Gardeners, landscapers, surveyors, nurserymen and farmers should exercise caution around this plant. As was mentioned previously, the plant juices can cause phytophotodermatitis. If the plant sap comes in contact with the skin in the presence of sunlight, a severe rash and/or blistering can occur. Therefore, extreme caution should be taken when con...
The authors would like to thank Dr. Jörg Ochsmann, Dr. Mads A. Sorensen, and the USDA-APHIS office for their photo contributions. A special thank you is extended to Settillo Codispoti for allowing OSU Extension educators to learn more about giant hogweed at his farm in Pierpont, Ohio. Reviewers of this document included: Jeff Stachler, Weed Scienti...
Neilson, C., Ravn, P., Nentwig, W., & Wade, M. (2005). The Giant Hogweed Best Practice Manual. Horsholm, Denmark: Forest & Landscape Denmark. (Online). Retrieved August 2005. researchgate.net/publi...United States Department of Agriculture, Animal & Plant Health Inspection Service (2002). Giant Hogweed.(Online). Retrieved August 2005. aphis.usda.gov/lpa/pubs/fsheet_faq_notice/fs_phhgweed.pdf (n...Mayer, L. (n.d.). Comparison of Management Techniques for Heracleum mantegazzianum in North and Central Europe.(Online). Retrieved August 2005. horticulture.coafes.umn.edu/vd/h5015/00papers/mayer.h...King County Washington (2004). Best Management Practices for Giant Hogweed.(Online). Retrieved August 2005. dnr.metrokc.gov/wlr/LANDS/Weeds/pdf/hogweed-control.pdf (no longer available online).Figures 1, 4, 5, 6, 7, 8 and 9. Photos courtesy of David Marrison, OSU Extension.Figure 2. Photo courtesy of the USDA-APHIS.Figure 3. Photo reprinted with permission from Dr. Jörg Ochsmann, Germany.Figure 10. Photo reprinted with permission from Mads A. Sorensen, Denmark.Heracleum mantegazzianum, commonly known as giant hogweed, [2] [3] [4] [5] is a monocarpic perennial herbaceous plant in the carrot family Apiaceae. H. mantegazzianum is also known as cartwheel-flower, [3] [4] [5] giant cow parsley, [6] giant cow parsnip, [7] or hogsbane.
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Jul 13, 2013 · A state survey in 2010 found giant hogweed in nine locations in northwestern Ohio with varying amounts of flowering weeds, said Dan Kenny, the Department of Agriculture’s assistant plant...
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