Jean-Pierre
The method you describe has been called the "Kramer plate" in Germany.
Ingemar Fries has used it in Sweden as well. It is well described in
"Living with Varroa" p 42 - 45.
The formic acid gel strips I have been using in trials are a similar
approach to achieving an extended release of the acid.
For Varroa, I think it may be preferable to apply at least part of the
material on the bottom board. When varroa drop from the cluster, they
would then encounter the stronger fumes at the bottom board level,
reducing reinfestation.
The French translation of the label is on it's way to you by fax.
Kerry Clark, Apiculture Specialist
B.C. Ministry of Agriculture
1201 103 Ave
Dawson Creek B.C.
V1G 4J2 CANADA Tel (604) 784-2225 fax (604) 784-2299
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