Horseweed (Erigeron canadensis) | Triple 5 Plant Codex

# Horseweed (Erigeron canadensis) | Triple 5 Plant Codex ## Identification Block - **Accepted Scientific Name:** *Erigeron canadensis* - **Family:** Asteraceae - **Common Names:** Horseweed - **Scope Statement:** This page covers *Erigeron canadensis* in the context of the Triple 5 Plant Codex for pasture weed management in TN/KY. ## Required Page Structure ### 1. Overview Horseweed is a native species often found in pasture systems in the Mid-South. It is classified under the Asteraceae family and is categorized as a weed, pasture, invasive. ### 6. Toxicity and Animal Interaction - **Toxicity Level:** Low - **Species Affected:** livestock - **Exposure Scenarios:** Risks associated with low toxicity level, particularly for livestock. ### 11. Homestead Decision Guidance **Remove.** Decision based on low toxicity and invasive status. ### 12. Source Reference Appendix - [USDA PLANTS Profile](https://plants.usda.gov/home/search?query=Erigeron%20canadensis) - [UT Extension - Weed Management](https://utextension.tennessee.edu/) - [UK Extension - Pasture Weeds](https://forages.ca.uky.edu/) ## Structured Data - **Title:** Horseweed (Erigeron canadensis) | Triple 5 Plant Codex - **Slug:** horseweed - **Common Name:** Horseweed - **Scientific Name:** Erigeron canadensis - **Family:** Asteraceae - **Categories:** weed, pasture, invasive - **Toxicity Level:** low - **Animals Affected:** livestock - **Invasive Status:** invasive - **Native Status:** native