On Wed, Dec 22, 2010 at 1:05 PM, randy oliver <[log in to unmask]> wrote:


> >In doing research on the neonics, I came across an interesting press
> release.  Note that the active ingredient of Cruiser, thiamethooxam,
> degrades to the active ingredient clothianidin (Poncho).
>

I don't see that in what you posted in order to "note" it.

And in searching the thiamethoxam metabolism I found:

"Thiamethoxam metabolism proceeded by the formation of a urea derivative, a
nitroso product, and nitro guanidine. Both urea and nitro guanidine
metabolites further degraded in plants, and a mechanism has been proposed."

Now, it is true that clothianidin is one particular nitroguanidine
(E-1(2-Chlor-1,3-thiazol-5-ylmethyl)-3-methyl-2-nitroguanidine).  But is
that the particular nitroguanidine that thiamethoxam degrades into?

All the neonicotinoids are related, but they are quite different products
(especially looking at their half life in the soil).  So it is of some
importance if thiamethoxam actually does degrade into the particular
nitroguandine that is clothianidin.  Could you elaborate a little more
please, Randy.

Stan

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