James,
Welcome to the wonderful world of the Imidacloprid(e) saga!!

The formulations containing this particular molecule pass under 
different guises - maybe "Gaucho" is familiar to you?

There is a wealth of information from many sources relating to how 
industry, researchers, beekeepers have viewed its mode of action in the 
"field".

Be warned, there are many conflicting attitudes, reports and positions.

Much time and cash has been spent trying to sort out the situation, 
reaching to European Union / National government levels. Legal contests 
have resulted in detail not being released to the general public.

Since its original introduction on to the market - details relating to 
its mode of action in the environment has changed. This being due to 
re-testing and improved techniques in residue/metabolite analysis 
amongst others.

The molecule has been removed/limited from several original crop 
applications.

Happy hunting!

Peter

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