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RE: Miraculous insecticidal chalk

thanks Katherine
the active ingredient is indeed very effective at 
stopping ants or any insects from proceeding further
Synthetic pyrethrums as a whole have this effect on insects
and are quite toxic to people.  Being bound into the chalk
probably helps it to last a little longer as well as these pesticides
tend
to have a fairly short half-life (breakdown quickly) especially in
sunlight.

rod
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Rod Randall
Weed Risk Assessment
Weed Science Group, Agriculture Western Australia

                 "I weed..." 

Weed Risk Assessment Home Page:
http://www.agric.wa.gov.au/progserv/plants/weeds/Weedsci.htm

Weed Activity Calender
http://www.agric.wa.gov.au/progserv/plants/weeds/calendar.htm

WeedBusters Home page:
http://www.agric.wa.gov.au/progserv/plants/weeds/buster/buster.htm

Plant Protection Society & Western Weeds Homepage
http://www.wantree.com.au/~weeds/

 ph: 08 9368 3443
fax: 08 9474 3814
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> ----------
> From: 	Katherine Pyle
> Reply To: 	kathpyle@ix.netcom.com
> Sent: 	Thursday, 10 September 1998 10:46 AM
> To: 	medit-plants@ucdavis.edu
> Subject: 	Re: Miraculous insecticidal chalk
> 
> >Anyone know anything about " Miraculous Insecticidal Chalk" from
> China?
> 
> The Bio-integral Resources people have tested it and had a half-page
> article on it in one of their newsletters. I have not seen the article
> but
> a friend of mine has a copy (lost somewhere in her piles of paper). 
> 
> The article said the active ingredient is a synthetic pyrethrum  --
> "delta-rethrine" (My spelling may not be correct as I am going on my
> friend's pronunciation from memory.)  
> 
> It is not a registered in the US, so is considered illegal for use as
> an
> insecticide. But believe me, it is incredibly effective. A tiny line
> is
> enough,... much less of a line than you tend to put down at first. I
> have a
> few permenant tiny chalk lines in place at key points in the kitchen
> and
> bathroom ...and my ant problems are a thing of the past.
> 
> Apparently it in the class of things that are relatiavely non-toxic,
> but
> you wouldn't want to eat a whole stick of it...and you wouldn't want
> to
> leave it lying around for a child to get into.
> 
> For more information, try contacting:
> 
>    BIRC (Bio-Integral Resource Center) 
>    PO Box 7414 
>    Berkeley, CA 94707 
> 
> 
> 
> Katherine Pyle
> Berkeley, California
> 
>
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