Ari Seppälä wrote:

>But has any other heard about a study where imidacloprid was fed to the bees?  

SEE:
Toxicity of imidacloprid feedings on honeybee (Apis mellifera) colonies.
Faucon, J-P., et al.

ABSRACT:
In order to test the hypothesis
that imidacloprid is responsible for bee mortality
leading to the weakness or loss of honeybee hives
reported in France over recent years, colonies were fed
with syrup containing imidacloprid at various concentrations
over a full year. Groups of eight hives each
were fed syrup alone or imidacloprid at 0.5 or 5 ppb; a
fourth, negative control group was unfed. The colonies
were fed on 13 occasions (July-August, 3x/week, 1
L/hive) and their summer development and winter development
followed. Assessments included mortality,
colony weight, capped brood area and incidence of diseases.
Population development and capped brood area
showed a similar development in all colonies with no
statistical differences between the colonies even at the
higher dose of 5 ppb. Other parameters (e.g. mortality
colony weight, diseases) also did not show any significant
differences between the treatments.

SOURCE:

http://www.bulletinofinsectology.org/Contents/Contentsbullinsect.htm

http://tinyurl.com/2mjsqb

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