The author of the paper gave a good explanation for his choice of
concentrations:

"The doses were chosen to cause low, but not 0 mortality in a 24-48 time
period. This was an acute mortality assay so not necessarily meant to mimic
field exposure.  I was most interested in assessing the mechanisms, and
will need to see if lower doses over longer periods have the same effects."

Mortality is a clear and simple metric--dead or alive, easy to count!  So I
feel that his use of those concentrations was indeed justified.  What we
need to be careful with, is wildly extrapolating the findings until they've
been replicated at field-realistic doses.

One thing that we've learned in this discussion, though, is that you sure
don't want to feed your bees canned tomato paste!

-- 
> Randy Oliver
> Grass Valley, CA
> www.ScientificBeekeeping.com
>
>


-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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