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permaculture - Re: [permaculture] Using leaves from clopyralid-treated lawn?

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  • From: "paul wheaton" <paul@richsoil.com>
  • To: permaculture <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] Using leaves from clopyralid-treated lawn?
  • Date: Tue, 6 Nov 2007 15:27:31 -0700

It has a half life of 11 years.

Testing is (was) about $125 per test. The poor man's test was to grow
peas in a soil sample. No peas means clopyralid is present.

Leaves and tree branches would contain residual levels of clopyralid.
You can compost them, but use the compost only on grasses.

On 11/6/07, Paul d'Aoust <paul@heliosville.com> wrote:
> Hi there, folks. Recently I saw a discussion -- may have been on this
> list; may not have -- about the herbicide called clopyralid.
>
> http://en.wikipedia.org/wiki/Clopyralid
>
> Apparently it persists for a long time in soils, unlike a lot of other
> herbicides, and has caused problems for many large composting operations
> in the States. It's especially nasty for Asteraceae, Fabaceae, and
> Solanaceae, three of my favourite plant families.
>
> Anyway, my question is this: do you think that leaves raked from a lawn
> that you suspect has been treated with clopyralid (it was given a
> weed-and-feed spray in early summer) would cause any problems in compost
> or sheet mulch? There are so many leaves in my townhouse complex, and
> it'd be a shame to not use them.
>
> Thanks in advance,
> Paul d'Aoust
>
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