On 25 Sep 2001, at 0:20, Neon Rosell wrote:
> Has anyone experimented on temperature control for varroa?
> The reason I ask is that my hives that are situated in a
> shady area are attacked by varroa much more than the ones
> that are exposed to the sun whole day.
See http://www.apis.admin.ch/english/host/pdf/alternativ/OstingyAVC.pdf
for a study that seems to back up your conclusions.