Subject: Treatment of the varroa bee mite with formic acid

From: [email-masked] (Klaus Krack)
Date: 1 Mar 1996 08:54:34 GMT

Keywords:vorroa bee mite

In the journal Bayerisches Bienen Blatt (ISSN 0724-8557) No.1/1996 I found
the following notice from Eduard Wimmer, Spitzwegstrasse 6, D 84453 Mühldorf:
Using an evaporator which has just the size and form that it can be placed
in a frame, you can succeed to get rid of the varroa mite for 95%. The evaporator
must be filled with a clean 60% formic acid. You need about 10g per day and
frame and you have to put the evaporator at the side of the brood nest. It 
should be leaved in the beehive for about 10 to 12 days. The evaporator comes
with two different wicks (18 cmxcm  and 40 cmxcm) to be used according to
the temperature outside and in order to get a concentration of about 10 ppm of
formic acid in the whole hive. The treatment should be done when the honey has been taken out in august and a second time at the end of september.
No negativ effects are indicated.

Has anyone already experienced this method?