[permaculture] Using leaves from clopyralid-treated lawn?

Kate Halstead rockyprairie at earthlink.net
Tue Nov 6 17:10:54 EST 2007


I'd be wary at the very least. Chances are you won't be able to help raking some grass as well as the leaves. If you are putting the resulting compost on a sensitive crop, it might not be a good idea.

Here's a list of studies done on the effects of clopryalid in Washington state. http://www.puyallup.wsu.edu/soilmgmt/Clopyralid.htm

Kate

-----Original Message-----
>From: Paul d'Aoust <paul at heliosville.com>
>Sent: Nov 6, 2007 1:18 PM
>To: permaculture at lists.ibiblio.org
>Subject: [permaculture] Using leaves from clopyralid-treated lawn?
>
>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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