Herbicide Residues in Manure, Compost, or Hay
Gopher tortoise on a sandy road. Figure 5 from publication FOR336/FR40: The Value of Private Non-Industrial Forestland for Wildlife Species Conservation. Credit: UF/IFAS.
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Organic Pest
Organic Gardening
Hay Production and Storage

How to Cite

Ferrell, Jason A., Petere J. Dittmar, Brent A. Sellers, and Pratap Devkota. 2017. “Herbicide Residues in Manure, Compost, or Hay: SS-AGR-415/AG416, 5/2017”. EDIS 2017 (3). Gainesville, FL. https://doi.org/10.32473/edis-ag416-2017.


When purchasing compost, it is important to understand that some manure-based products can contain herbicide residues that can affect the growth of certain plants. Manure from animals that have been fed forage treated with aminopyralid or other closely related herbicides, such as clopyralid or picloram, can be contaminated with these herbicides, which severely restrict the growth of legume and solanaceous crops and other broadleaf plants. This 3-page fact sheet discusses aminopyralid, compost, questions to ask when purchasing bulk compost or mulch, conducting a bioassay, aminopyralid injury symptoms, and steps to consider if contaminated manure or compost has been added to a garden or field site.

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Shaner, D. L. 2014. Herbicide Handbook. 10th ed. Lawrence, KS: Weed Science Society of America. 43-46.

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND 4.0) license.