> By dissolving the menthol in vegetable oil the surface area is
> greatly increased...

A method popular in Saskatchewan is to use corrugated cardboard smeared with a
Crisco/menthol mix.  The sheet is placed on the bottom board.  I've never used
it.

> Best time to treat with menthol is spring though not fall but this
> treatment will work earlier in the spring at cooler temperatures.
> Note timing is determined by tracheal mite life cycle ...

Does anyone know, offhand how effective menthol is compared to formic -- and
vice versa?  Is there much difference in the recommended timing of treatments?

allen
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