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      • Giant hogweed (Heracleum mantegazzianum) is on the federal and Ohio noxious weed lists making it unlawful to propagate, sell or transport. It has been included on these lists because of its ability to crowd out native plants and because of its potential human health hazard.
      ohioline.osu.edu/factsheet/anr-35

      Giant Hogweed (Heracleum mantegazzianum) | Ohioline

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  3. u.osu.edu › sustainability › 2018/06/19Yes, there’s giant hogweed in Ohio (in some places): What to ...

    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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  4. ohioline.osu.edu › factsheet › anr-35Giant Hogweed (Heracleum mantegazzianum) | Ohioline

    • 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...

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    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...

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    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...

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    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).

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    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.

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  6. ohiostate.pressbooks.pub › ohionoxiousweedsGiant hogweed – Identifying Noxious Weeds of Ohio

    Ohio’s Noxious Weeds. Giant hogweed. Heracleum mantegazzianum, giant hogweed. Family: Parsley, Apiaceae. Habitat: Rich, moist soils along roadside ditches, stream banks, waste ground, along tree lines and open wooded areas. Life cycle: Biennial or herbaceous plant. Growth habit: 8-15 ft tall.

    • Is giant hogweed a noxious weed in Ohio?1
    • Is giant hogweed a noxious weed in Ohio?2
    • Is giant hogweed a noxious weed in Ohio?3
    • Is giant hogweed a noxious weed in Ohio?4
    • Is giant hogweed a noxious weed in Ohio?5

  7. ocj.com › 2020 › 09The legalities of noxious weeds – Ohio Ag Net | Ohio's ...

    Sep 18, 2020 · The Ohio Department of Agriculture (ODA) is in charge of designating “prohibited noxious weeds.”. The list may change from time to time, but currently, noxious weeds include: Russian thistle (Salsola Kali var. tenuifolia). Johnsongrass (Sorghum halepense ). Wild parsnip (Pastinaca sativa).

  8. ohiostate.pressbooks.pub › ohionoxiousweeds › partOhio’s Noxious Weeds – Identifying Noxious Weeds of Ohio

    Ohio’s Noxious Weeds. Ohio currently has 21 noxious weeds:*. Apple of Peru………………………………….. Nicandra physalodes. Canada thistle……………………………………….. Cirsium arvense. Cressleaf groundsel………………………………. Senecio glabellus. Giant hogweed……………………..

  9. www.invasive.org › species › listOhio Noxious Weeds - Invasive

    Ohio Noxious Weeds. Ohio laws and rules. 2019. Prohibited noxious weeds. Ohio laws and rules. ... giant hogweed: Heracleum mantegazzianum Sommier & Levier: Apiaceae ...

  10. ohiostate.pressbooks.pub › ohionoxiousweedsIdentifying Noxious Weeds of Ohio – Open Textbook

    This identification guide provides technical descriptions and photos for Ohio’s 21 invasive and noxious weed species. These descriptions include information on habitat, life cycle, key plant characteristics, and a summary of problematic features.

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