11/07/2018    205    8    3,90    289    0    0,00    100,0
18/07/2018    173    5    2,89    312    0    0,00    100,0
24/07/2018    450    5    1,11    330    6    1,82    45,5
07/08/2018    307    34    11,07    450    6    1,33    85,0
22/08/2018    237    14    5,91    429    8    1,86    63,6
11/09/2018    465    75    16,13    459    0    0,00    100,0

This is really interesting data.  In my email the column headers are corrupted for spacing.  If others have the same issue here are the headers for the eight columns (I hope):
Date
Number of brood nymphs counted
Number of Varroa observed
% infestation with Varroa
Number of bees in wash
Number of Varroa
% infestation of bees  (This is the usual wash number we talk about)
% of total Varroa found in brood

Note: date is given in European style of Day/month/year

What this data says is up to 100% of the mites can be in the brood at times!  Can this in part explain why at times suddenly mite % on a wash increases like crazy?  We have been blaming this type of sudden increase on robbing bringing home lots of mites.  Perhaps it is just mites coming out of brood.   Perhaps due to a decrease in brood rearing?

Dick

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