ATTRA - National Sustainable Agriculture Information Service

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ATTRA - National Sustainable Agriculture Information Service
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ATTRA Question of the Week

Where can I find commercially-available natural sources of gibberellic acid-3 (GA-3)?

P.S.
Ohio

Answer: Gibberellic acid is produced by a process of fermentation wherein a pure strain of the fungus Gibberella fujikorai is cultured in vats, then extracted and purified to obtain GA-3. Several GA-3 sources are approved for organic production and listed on the OMRI Brand Name Products List (Crop Production Products; see Resources, below).

Without any further explanations or research into product sources, I alert you to the attached excerpts from the OMRI List that identifies product suppliers of GA-3.

Also of interest is the leaflet from J.L. Hudson Seedsman on GA-3. It provides interesting notes on the history and origin of GA-3, experimental design and recordkeeping, treatment methods, preparation, seed treatments, and views on its use in organic production.

Resources

OMRI
Box 11558
Eugene, OR 97440
541-343-7600
www.omri.org/

OMRI Brand Name Products List
www.omri.org/OMRI_brand_name_list.html
Gibberellic acid kits and supplies

J.L. Hudson, Seedsman
Star Route 2, Box 337,
La Honda, CA 94002
www.jlhudsonseeds.net/GibberellicAcid.htm

Posted: January 16, 2005

About the Question of the Week

Each "Question of the Week" is an actual research query submitted by a farmer or rancher and answered by an Agriculture Specialist from the USDA-funded ATTRA program, managed by the National Center for Appropriate Technology.

For more information on sustainable agriculture, visit our "Publications and Resources" pages (located in the upper-left navigation area of the page), where you will find ATTRA publications and additional Web links.

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ATTRA - National Sustainable Agriculture Information Service is managed by the National Center for Appropriate Technology (NCAT) and is funded under a grant from the United States Department of Agriculture's Rural Business-Cooperative Service. Visit the NCAT Web site for more information on our sustainable agriculture projects.

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