>>> > >If you had said "a direct measurement of the mite infestation rate of a
>> >_subset_ of the_adult_ population"
> Yes, should have said : ) Although I find that there is not that much
> variation between washes from any frame from the broodnest, nor day to day.
On Thursday September 30th 2010, while on inspection duty, I found
washes of 17 and 2 in the same hive. The first (2) was taken from a
frame immediately above the brood in a strong fall double brood chamber
hive. The larger reading (17) was from off the actual brood.
As for consistency of drops, here is a little from my current project:
http://honeybeeworld.com/diary/images/2012/dropsandwashes.gif
They seem quite consistent to me.
My detailed results from last winter's drops is at
http://www.honeybeeworld.com/diary/files/drop.htm
and can be analyzed for consistency. They seem as consistent to me as
the many washes I have done and which often gave several different
results _for the same sample_ each time the jar was shaken and counted
-- often varying by as much as 50% an sometimes more.
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