>I saw the inch of dead bees after the double >MAQS treatment around the
first of September, >2015.  I had about 7% queen loss, lots of small
>colonies afterward that.  I combined the small >ones at the time, so went
from 400 to 300 in >the fall.


What were the mite levels prior to treatment?  This sounds a lot to me like
what happens when mite levels exceed 9 or 10% in the fall.  At that point
mortality during treatment is high and colonies tend to rapidly dwindle.  I
have tried both MAQS and OAV in this scenario and the end result was
similar.  About 30+% of colonies are too small to winter and have to be
combined  with others.  I find that might levels are above treatment
threshold in early August and have been treating with at least a single
strip of MAQS and sometimes two at that time.  They then usually need a
September follow up.


Adam

Barrie, ON

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