poison hemlock: References & Edit History
Article Contributors
Primary Contributors
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Melissa Petruzzello
Melissa Petruzzello (she/her) is Assistant Managing Editor and covers plants, algae, fungi, insects, spiders, renewable energy and environmental engineering. She also handles certain topics in Christianity, notably Protestant history and churches.
Other Encyclopedia Britannica Contributors
Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Add new Web site: University of Nebraska-Lincoln - Nebraska Extension in Lancaster County - Poison Hemlock. | Oct 29, 2026 | ||
| Add new Web site: Oregon State University - Solve Pest Problems - Poison Hemlock. | Feb 25, 2026 | ||
| Add new Web site: Mississippi State University Extension - Poison Hemlock. | Jan 02, 2026 | ||
| Add new Web site: North Carolina Extension Gardener Plant Toolbox - Conium maculatum. | May 23, 2025 | ||
| Add new Web site: Colorado State University - College of Veterinary Medicine and Biomedical Sciences - Guide to Poisonous Plants - Hemlock, poison hemlock. | Apr 11, 2025 | ||
| Add new Web site: Minnesota DNR - Poison hemlock (Conium maculatum). | Jan 31, 2025 | ||
| Add new Web site: National Center for Biotechnology Information - PubMed Central - Acute Intoxication with Poison Hemlock (Conium maculatum). | Dec 20, 2024 | ||
| Add new Web site: University of Maryland Extension - Poison Hemlock Identification and Management. | Nov 05, 2024 | ||
| Add new Web site: Cleveland Clinic - Poison Hemlock. | Sep 25, 2024 | ||
| Add new Web site: PennState Extension - Is it Poison Hemlock or Wild Chervil? | Aug 14, 2024 | ||
| Add new Web site: WebMD - Poison Hemlock Poisoning. | Jul 05, 2024 | ||
| Add new Web site: The Spruce - How to Identify and Remove Poison Hemlock. | May 21, 2024 | ||
| Add new Web site: University of Arkansas - Division of Agriculture Cooperative Extension Service - Poison Hemlock. | Apr 12, 2024 | ||
| Add new Web site: Go Botany - Poison-hemlock. | Feb 29, 2024 | ||
| Add new Web site: University of Minnesota Extension - Poison hemlock. | Jan 18, 2024 | ||
| Add new Web site: Michigan State University Extension - Agriculture - Poison hemlock identification and control. | Nov 17, 2023 | ||
| Add new Web site: Purdue University Extension - Poison Hemlock. | Aug 22, 2023 | ||
| Add new Web site: Washington State Noxious Weed Control Board - Poison Hemlock: Options For Control. | Jul 10, 2023 | ||
| Add new Web site: USDA Agriculture Research Service - Poison Hemlock. | May 04, 2023 | ||
| Add new Web site: University of Montana Extension - Poison hemlock. | Feb 21, 2023 | ||
| Add new Web site: UC|IPM - Poison Hemlock. | Jan 11, 2023 | ||
| Article thoroughly revised. | Mar 28, 2017 | ||
| Added new Web site: School of Veterinary Medicine at Purdue University - poison hemlock. | Apr 28, 2008 | ||
| Added new Web site: Penn Veterinary Medicine - Poison Hemlock. | Apr 28, 2008 | ||
| Added new Web site: Colorado State University Cooperative Extension - Poison Hemlock. | Apr 28, 2008 | ||
| Added new Web site: Nova Scotia Museum of Natural History - Poison Hemlock. | Apr 28, 2008 | ||
| Added new Web site: Environmental Laboratory, U.S. Army Corps of Engineers - Conium maculatum L. (Poison Hemlock). | Apr 28, 2008 | ||
| Added new Web site: Integrated Taxonomic Information System - Conium maculatum. | Apr 28, 2008 | ||
| Added new Web site: Utah State University - Poison Hemlock. | Apr 28, 2008 | ||
| Added new Web site: Utah State University - Poison Hemlock. | Apr 28, 2008 | ||
| Added new Web site: Ohio State University - Poison Hemlock. | Apr 28, 2008 | ||
| Added new Web site: Virginia Tech - College of Agriculture and Life Science - Poison Hemlock. | Apr 28, 2008 | ||
| Added new Web site: Montana State University - Poison Hemlock. | Apr 28, 2008 | ||
| Article added to new online database. | Jul 20, 1998 |
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