>>I checked my colonies regularly last winter, and found that they
were almost broodless (less than 12 capped cells) around New Year.
12 capped cells is not bad since, I believe, the OA concentration
lasts for a couple of weeks.
I checked my colonies over the weekend. They had 1-2 frames of
mostly capped brood. They were broodless at this time last year.
I guess I'll be applying the OA in mid-December. :) I'll wait for a
nice day with above-freezing temps to check for broodlessness. I
would not want to check the frames in sub-zero temps since some bees
would try to fly and be lost. But I agree that, once broodlessness
is confirmed, OA can be dribbled in below 0 C weather.
Waldemar
Long Island, NY
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