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Date: | Sun, 13 Apr 2008 11:02:25 EDT |
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Peter
CCD colonies are not necessarily completely dead - remember, we usually see
a queen and a small cluster of young bees. Typically, in a given bee yard,
we see a few strong colonies, some moderate colonies - both of which
visually
look to be ok. Then we see failing CCD colonies - a queen, mostly young
bees, an excess of brood (at the time of year when queen's are laying -
often
2-4 frames with some beew). We also see some collapsed colonies (queen and
small retinue of very young bees - barely cover 1/2 of one frame), and a
few
empty boxes. Over a period of a few weeks, we usually see more failing and
collapsed colonies in a yard, with CCD sometimes taking out every colony,
but
more often, taking out 50-80% of the colonies within a beeyard or holding
yard.
In large holding yards, we've seen it start at one end and roll through to
the other end like a wave.
This past fall/winter/spring, we've seen a higher percentage of empty boxes
(even the queen is gone). Remember also, I don't necessarily think Nosema
and CCD are the same. The one case that I saw that looks like the classic
Nosema ceranae kills reported by the Spanish had dead bees with lots of
Nosema in
them.
Jerry
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