>we do six hives in a yard and if any one of them shakes more than 6 
>mites...

How many hives are in a yard? I have seen conflicting advice on how many 
hives to sample. I believe Curry suggess 10%; our provincial bee health 
advisor suggests 25%. I used the 25% suggestion this year and was very 
surprised by how often there would be just one sample with a lage number of 
mites, the rest showing low infestation. I would think a 10% sampling rate 
would miss a lot of these situations.

Tom Cosman 

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