Richard,
You mention that Imidacloprid is used to control Varroa by sub- lethal
doses of the molecule being applied to the bees.

Would you be as kind as to expand on the subject.

Dick Rogers - Entomologist\ IPM specialist is under taking research into
possible effect of Imidacloprid on Honey bees in Prince Edward Island,
Canada at the moment.
www.wildwoodlabs.com

This is a very delicate subject for many reasons - mainly legal. This is
maybe a reason why you have had little response to your question.

Also, there is possibly the fear by responsible individuals -
departments not wishing to get mixed up in such a problematic topic.
Others have just given up - worn down by the tactics used to limit
information.

People used to to be dusted with DDT because it worked! - and it has
taken years to get certain facts admitted by the relevant authorities
concerned companies that this was not the complete story. Lack of
evidence at the appropriate time didn't help matters - but neither did
the refusal to accept further research conclusions.

Material that is used in the public domain should to my way of thinking
have all facts relating to it also in the public domain. Research that
is undertaken by Government departments should not be able to retreat
away from inquiry using the excuse that the research was paid for by a
third party.
and...
and...........

Regards
Peter