Peter said:
I have been involved in extensive formic acid trials at a university over
the
past 3 years, involving hundreds of hives.

Can you comment on results and observations?

We used a fiber board pad soaked with formic, placed above the frames inside
a one inch deep rim. The cover and rim is duct taped in place to keep the
fumes from escaping.

Sounds like the Medhat N. method?  Am I correct in guessing so ?

Taping the top is OK but what did you do to prevent the fumes (heavier than
air ) from flowing out the front entrance? In my humble opinion fumes
dropping and flowing out the front entrance is one reason many times
treatments fail.

Peter said:
But it is up to the bee industry to get formic on the market. I don't know
what the status of that effort is these days.

As soon as bee equipment suppliers can figure a way to make money on sale to
beekeepers movement should happen fast.

Bob

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