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Derris Dust

Posted: Fri Sep 08, 2006 10:38 pm
by Compo
According to this months KG Magazine Derris Dust is organic? Is this true?

Posted: Sat Sep 09, 2006 9:08 am
by bigpepperplant
that's what I've always been told

Posted: Sat Sep 09, 2006 7:57 pm
by Sue
Yup it is - active ingredient is rotenone which I believe is a plant extract from the tropics. Non-selective pesticide though, so organic but will kill your friends as well as your pests :?

Sue

Posted: Sun Sep 10, 2006 1:26 am
by Johnboy
Hi Compo,
An informative fact sheet.
www.pan-uk.org/pestnews/Actives/rotenone.htm
I know that it was on the Organic list but I read a long time ago that they were to phase it out because although it may be organically derived it is not as safe as it was once thought.
Hope this assists.
JB.

Posted: Sun Sep 10, 2006 9:42 am
by Iain
Don't know if this helps, but I remember, back when the world was young (and politically incorrect), we used liquid derris to poison the coarse fish in the loch prior to stocking it with trout. That was with scientific supervision! Memory horrifies but then it was just spectacular and fascinating.

I.

Posted: Sun Sep 10, 2006 7:17 pm
by mandylew
Iain, do you know loch rusky near Calendar? I spent all my holidays there when i was a wee lass. No coarse fish as far as I remember, brown trout.

Mandy

Posted: Sun Sep 10, 2006 11:41 pm
by Iain
Hi Mandylew, I p.m.ed you.

Iain.

Posted: Mon Sep 11, 2006 9:38 am
by Compo
Hmm having read this website, I am not so sure about it now, will stick to my plan of building brassica frame nets for the control of the cabbage white caterpillar me thinks.