>We then immediately placed two Apistan(r) strips into each of the same
tested
>hives and inserted sticky boards with screens.  The strips and boards were
left
>in the hives a minimum of 24 hours and a maximum of about a week (see
data).

Could the length of time the strips were in some of the hives made the
Apistan tests look better? The week long applications in some hives would
have resulted in a lot more of your emerging brood contacting the strips.

I would say you have a good start to tell if the roll can give you any
useful information.