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Date: | Tue, 9 Mar 2021 17:49:23 -0800 |
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> Austrian yearly colony loss surveys find a correlation between
better winter survival and altitude above a certain threshold.
Likely due to the longer duration of the broodless period.
>So at this point I am wondering: how big a problem/factor is drift?
Big.
>Is drift a big factor in mite treatment efficacy variation?
Yes.
>Is it worth investing more in drift prevention?
Yes.
>Are there strategies in your operation that you can recommend for that?
I don't make recommendations, but in our operation, we find that performing
a mite wash on each and every one of our 1500 hives in June more than pays
for itself in savings from unneeded treatments, and the elimination of the
high-mite "diffuser" colonies that spread mites throughout the operation.
The other things that help are doing everything we can to prevent swarming
(because the mites in them later come back to bite you), and helping any
neighboring beekeepers to control mites in their hives.
Randy Oliver
Grass Valley, CA
530 277 4450
ScientificBeekeeping.com
>
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