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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.

    • Ohioline

      Giant hogweed (Heracleum mantegazzianum) is on the federal...

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      August 24 2021 August 23, 2021 Elena Irwin, pictured, CFAES...

    • On The Farm

      Titled “If You Listen Carefully, It Sounds Like Love,” the...

  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

    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. Leaves: Are lobed, deeply incised and up to 5 ft. across.

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  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. www.transportation.ohio.gov › 02-noxious-weedProhibited Noxious Weeds | Ohio Department of Transportation

    Giant hogweed is not prevalent in Ohio but has been located in isolated stands in eastern Ohio and neighboring states. Giant hogweed prefers moist soil around waterways and is tolerant of shade but can also grow in full sun in dry soils around ditches.

  9. 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……………………..

  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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