Reply #62

In order to remain certified, organic farms cannot use traditional chemical herbicides. Organic herbicides rely on ingredients like vinegar and citric acid.

All Down Organic Grass and Weed Killer
Source: SummerSet Products, Inc. Bloomington, MN
Active Ingredients: Citric Acid - 5.0%, Garlic - .2%,
Other Ingredients: Acetic Acid, Yucca Extracts and water – 94.8%
Ground Force Organic Herbicide
Source: Abby Laboratories, Inc., Ramsey, MN
Active Ingredients: Citric acid - 10.0%, Garlic extract - 0.2%
Inactive Ingredients: Vinegar, yucca extract and water - 89.8%
Burn Out II - Weed and Grass Killer
Source: St. Gabriel Laboratories, Orange, Virginia
Active Ingredients: Clove Oil - 4.0%, Sodium Lauryl Sulfate - 3.0%
Other Ingredients: Vinegar, Lecithin, Citric Acid, Mineral Oil and water - 93%
Everything Must Go!TM
Source: Farm Extracts, Inc., St. Paul, MN
Active Ingredients: Citric Acid - 10.0%, Garlic Oil - 5.0%, Lauryl sulfate - 1.0%
Inert Ingredients: Acetic Acid and water - 84%

http://www.extension.umn.edu/yardandgarden/YGLNews/YGLN-Mar0106.html

Organic Herbicides

Organic Herbicides Ingredients include concentrated d- limonene, clove oil, cinnamon oil, vinegar, and citric acid. These herbicides are non-selective and non-systemic, meaning any plant sprayed will be affected, and they kill the above surface foliage of plants.

Non-Selective Synthetic herbicides can "select" which types of plants the chemicals will effect. Organic herbicides cannot do this and so are "non-selective."

Non-Systemic Synthetic herbicides go into the system of plants, organic herbicides do not, and so are "non-systemic."

Note to Certified Organic Farmers: While we do our best to stay current with product OMRI listings, be sure to check with your certifying organization for a current list of approved (or banned) products.
http://www.groworganic.com/weed-pest-control/organic-weed-control/organic-herbicide.html