Well the polar express has come and gone; hopefully there
will be no recurrences for the remainder of the winter. By my count we have now had 9 below zero F
nights this winter; the worst being -30F.
On the positive side the amount
of daylight has increased more than an hour since the winter solstice back in
December.
They say healthy, well fed, bees can survive extreme low
temperatures. I’ve worked hard at both
aspects with a strong varroa control program, fall feeding and adding emergency
food stores to all hives. Just prior to
those two nights of -30F temperatures I went out and surveyed my hives. At that point I was still holding at the 97%
survival level. But it was with more than
a little trepidation that I went out today, February 1st, to check
on my hives again. We can
say that these extremely cold temperatures are acting to biologically winnow
the weak from the strong. I guess the survivors can be truly called
survivor stock.
The three amigos shared their varroa control programs from
last summer during our December club meeting.
All three programs were shown to be effective based on Randy Oliver’s
varroa model. The results we are seeing
this winter seem to agree.
So here are my results.
Over the past 9 below zero nights I lost NO hives. To date 97% of my
hives are still surviving! So far, I am
a happy beekeeper. At this time last
year my survival was only 60%. Even all
12 nucs are still alive, which totally surprised me. Beekeeper Gerard reported yesterday that all
of his home hives are still alive. He
also reported -36F. Wow! Beekeeper Jon has reported that 94% of his
home hives are alive. So, the increased
focus on mite control by all of us appears to be improving winter survival and also confirms the prediction of Randy Oliver’s varroa model.
After a brief early
February thaw, I see the weather forecast has another short bout of below zero
nights about a week from now, but this time for only three days and only down
to -4F. There are still 2 months of winter to go, so
tomorrow we will all be checking the emergency food supply in our hives.
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