> Formic Acid is being used extensively in Canada where it is now
> legal
<snip>
> That is why I
> like the Nassenhof dispenser developed in Germany and available in
> the U.S. from Betterbee. It wicks the formic right in the center of
> the brood cluster and will last three weeks. It has been extensively
> tested in Germany but needs to be extensively tested in this country
<etc.>
One test to ponder is the effect on honey production.
 
Some studies have apparently shown slow release methods to have a
significant negative effect on honey production compared to quick
release ones.  Both had similar effetcs on mite levels.
 
FWIW.
Regards
 
Allen
 
W. Allen Dick, Beekeeper                                         VE6CFK
RR#1, Swalwell, Alberta  Canada T0M 1Y0
Internet:[log in to unmask] & [log in to unmask]
Honey. Bees, & Art <http://www.internode.net/~allend/>