I saw this on the beekeeping newsgroup and would like your thoughts
concerning it use as a varroa treatment. Anyone use it? Any truth to it.
Bill Truesdell
Bath, ME.

Quote- with some editing: get a  100 gram bottle of thymol.  Add 1/2 ounce
of menthol and 1/2 ounce of champhor.
Fill the bottle with Eucaliptus oil.  Let it stand for a day in the sun
until all is disolved.  buy a pack or two of cheap (10 for a buck)
sponges.  Cut them in half.  In a bucket or bowl with rubber gloves soak
the sponges and wring them out.  Place a sponge on the frames under the
inner cover.  Repeat a week or two later if necessary.
You will probably have to special order the thymol and eucaliptus oil.  A
jar of your best honey to the head pharmasist is a good investment.
Using this treatment every couple of years takes care of the resistance
problem.  Really makes the Apiary smell nice too! USDA in Beltsville,
Maryland developed this treatment.

Another message- quote continued:
This treatment was developed by Nick Calderone sp? when he worked at
Beltsville.  According to his talk on the subject he had somewhere around
99% kill rate.  The actual formulation of his was 75% Thymol, 16%
Eucaliptus, 4.5% Campher, and 4.5% Menthol.