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  • From: Mark <mpludwig@facstaff.wisc.edu>
  • To: midwestpermaculture@yahoogroups.com, permaculture@lists.ibiblio.org
  • Subject: [permaculture] Fwd: [grazersedge] Info on vinegar as a weed killer
  • Date: Fri, 31 May 2002 09:54:43 -0500

Date: Thu, 30 May 2002 12:35:11 -0500
From: "James, Roger L DATCP" <Roger.James@datcp.state.wi.us>
Subject: [grazersedge] Info on vinegar as a weed killer
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Thought this might be of interest to some.

SOME SOUTH DAKOTA FARMERS WAGE WAR ON WEEDS -- WITH VINEGAR
May 27, 2002
Knight-Ridder Tribune
David Dickey
Vinegar is, according to this story, quickly becoming a popular product in
the war on weeds.
Gary Cwach, a farmer in Yankton, was quoted as saying, "I started using it
three years ago. I was having a lot of trouble with Canada thistle, and
nothing I tried worked. I finally tried using vinegar, and it worked well.
Using it and getting the calcium level in the soil where it belongs have
been the key."
Cwach was further cited as saying that vinegar is not only cheaper than
chemical herbicides, it's also a safer and more natural way to get rid of
weeds. He buys 55-gallon drums of vinegar for $300 each. Cwach dispenses the
vinegar by putting it into a 15-gallon spray tank that he attaches to an
all-terrain vehicle. The vinegar, which is fully biodegradable, is released
through a 14-foot-long boom. He said he usually makes two passes over areas
in need of spraying. On average, he uses about five gallons of vinegar an
acre.
The story says that ARS researchers Jay Radhakrishnan, John R. Teasdale and
Ben Coffman began a scientific study of vinegar as a weed killer about two
years ago. The study is credited as being the first of its kind.
So far, the researchers have tested vinegar on the most common weeds,
including common lamb's quarters, giant foxtail, velvetleaf, smooth pigweed
and Canada thistle. The tests have been done in a greenhouse and in the
field.
The weeds' leaves were sprayed uniformly with various solutions of vinegar
made from fruits and grains, and the researchers determined that 5- and
10-percent concentrations killed the weeds during their first two weeks of
life. A bottle of household vinegar is about a 5-percent concentration.
Older plants required higher concentrations of vinegar to kill them. At the
higher concentrations, vinegar had an 85- to 100-percent kill rate at all
growth stages.


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Mark P. Ludwig
Poultry Research Lab
University of Wisconsin -Madison
608-262-1730 WK
608-846-7125 HM




  • [permaculture] Fwd: [grazersedge] Info on vinegar as a weed killer, Mark, 05/31/2002

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