> I guess me being slow!

Me too.  I still don't get it.

> It is calculated after the three treatments of Hopguard. Then we
> applied Apivar as a finishing treatment. All collected mites were
> then counted and calculated based on the relative efficacy to Apivar.
> The efficacy was 40% relative to Apivar.

So, if I have this right, You treated on group of hives three times then
dropped the remaining mites with Apivar.

You also had controls which were not treated during the test, but got
the same Apivar treatment as you used for finishing the test hives.

You assumed that you dropped essentially all the mites with Apivar and
compared the drop from the test hives to the control count and found the
Hopguard hives had 60% as many mites and reported this as a 40% efficacy?

Is that right?

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