NCAT NCAT ATTRA ATTRA

What Is Sustainable Agriculture?

Master Publication List

Education

Energy Alternatives

Beginning Farmer

Field Crops

Horticultural Crops

Livestock & Pasture

Local Food Systems

Marketing, Business & Risk Management

Organic Farming

Pest Management

Soils & Compost

Water Management

Other Resources

Calendar of Events

Home Page


Contribute to NCAT

Newsletters

Newsletter sign up button

· Privacy Policy · Newsletter Archives


RSS Icon XML Feeds

RSS 2.0: Events, Breaking News, Funding Opportunties Atom: Events, Breaking News, Funding Opportunties

 

NCAT strives to make our information available to everyone who needs it. If you are a limited-access or low-income farmer and find that one of our publications is just not in your budget, please call 800-346-9140.

 

How are we doing?

 

Find Us on Facebook Follow Us on Twitter Follow us on Pinterst Visit the ATTRA Youtube Channel
Home  > Question of the Week

Question of the Week



Permalink How can I organically control weeds under my perimeter electric fence?

P.S.
Ohio

Answer: There are several alternative herbicides available from Peaceful Valley Farm and Garden Supply and other companies that have OMRI listing.

Below is a list of some articles and other sources dealing with the use of vinegar as a natural herbicide. Some practices mentioned in these resources may not be allowed by your certifying agency. As far as I can determine, OMRI allows herbicides using acetic acid as an active ingredient if they are natural source only, and are registered with EPA. If the natural acetic acid is not listed as the active ingredient (non-active ingredient or inert), then the product 1) must have natural acetic acid content of less than 8% before it is added to the formulation, 2) must have natural acetic acid contents less than 5% as a final product, and 3) must have another ingredient listed as the active ingredient.

Remember, organic production practices and materials needs to be approved by your USDA approved, certifying agency and written into your organic system plan. Each certifying agency has different interpretations on approved control methods and materials. You should also check with your certifier with any questions.

Please consider the following advice with respect to use of material inputs:

a. List every material you use or plan to use in your Organic System Plan (OSP) that you submit to your certifier as required.

b. Identify the source and/or manufacturer of every material.

c. Attach a label with a list of all ingredients including inerts.

d. If the manufacturer does not provide a complete list of ingredients for the product, check to see if it is on an approved list of Brand Name materials, such as OMRI or WSDA (see www.OMRI.org and http://agr.wa.gov/foodanimal/organic/materialslists.html)
Note: if someone says their product is OMRI listed or cites an article that states that they are, or even shows the OMRI seal on the packaging, beware. It is the producer’s responsibility to verify the truth of that statement by checking the current lists on the website. Inclusion on the list must be renewed every year. Products may be listed one year and not the next. Reformulations (common in the industry) may render a product non-compliant or possible make it compliant. In some cases, producers will be required to document which lot number of a product they used in order to verify compliance.

e. Be sure everything is in your OSP and that it is approved by your Certifier before you use it. Your certification depends on it!

f. Keep documentation of every input material purchase and application for 5 years.

Resources:

Anon. 2003. Vinegar-based and citrus-based weed killers. Fine Gardening. May-June. p. 88, 90.

Chinery, David. 2002. Using acetic acid (vinegar) as a broad-spectrum herbicide. Rensselaer Horticulture. 5 p.

Jensen, Erika. 2004. Organic inputs: distinguishing myths from realities. Organic Broadcaster. No date. p. 6.

Peaceful Valley. 2006. AllDown Green Chemistry Herbicide, Matran EC, Pest Solution Chart, and Using our products & organic certification. 7 p. www.groworganic.com

Shaffer, Bob. 2003. Vinegar coffee, grapes and ginger. 4 p.
SANET-MG@LISTS.IFAS.UFL.EDU

Williams, Greg and Pat. 2003. Commercial acid-based herbicide. HortIdeas. March. p. 1.

 Permalink

 

« What organic hay preservatives are available? :: What do I need to know about seeding turnips into corn as a forage crop? »

Question of the Week Archives
[Contact]