Yes, very effective, the blue ones work best.
On Sun, 2 Nov 1997 20:52:10 -0800 jmortier <[log in to unmask]>
writes:
> I receintly talked to a commercial bee keeper about mite control and
>she
>suggested that I drop several Halls Mentho-lyptus cough drops into the
>top
>of the hive as a preventive measure. The bees lick the drops and the
>vapours
>effect the mites. For those who are not familiar with the drops these
>are
>the active ingredients ; Menthol (8%- 15% depending on flavour) ,
>Eucalyptus
>oil 7.2%
> Has anyone tried this method, and is it effective?
>
>  J.Mortier
>  Hicks Creek farms
>  [log in to unmask]
>  Agassiz, B.C., Canada          " If you can't mine it, you have to
>grow it."
>
>